+ of 2000 circuitos de eletrônica encontrados na web

sendo alarmes e circuitos relacionados com segurança, amplificadores de potência de áudio, circuitos relacionados com vídeo, tranmissores de fm tv e circuitos de rf em geral, grande coleção de circuitos transmissores de rf seja em am fm radioamador ou tv, circuitos usando microcontroladores intel 8051, microchip pic, avr, motorola e outros circuitos de programadores de diversos microcontroladores e memórias eprom, o esquema que você procura pode estar aqui.

Alarmes e circuitos relacionados com segurança
Amplificadores de potência de áudio e RF
Aquisição de dados e circuitos lógicos
Automotivo e circuitos relacionados com carros
Energia solar
circuitos de Filtro de áudio e rf
Fontes de alimentação fixas e ajustáveis
Games e diversão (circuitos)
Iluminação circuitos de controle
Instrumentos de bancada teste e medição
Infravermelho circuitos relacionados
Laser transmissão e fontes de alimentação
LED circuitos relacionados
Médico e saúde instrumentos
Microcontroladores circuitos, gravadores e placas de desenvolvimento
Miscelânea de circuitos
Miscelânea de circuitos de áudio
Modelismo e controle remoto
Motor e controles em geral
Música circuitos relacionados
PC e periféricos
PDA interfaces
Pré-amplificadores de áudio
Radiofreqüência (veja também transmissores)
Telefonia e intercomunicação
Temporizadores, osciladores etc.
Transmissores FM, AM, radioamadores, etc.
Vídeo circuitos relacionados
Links direto aos circuitos, problemas com links quebrado nos avise! Boa sorte.
Alarmes e circuitos relacionados com segurança


  1. A Combination Lock
  2.  Residential Alarm
  3. Proximity alarm
  4. Enhanced 4 Digit Alarm Keypad
  5. Modular Burglar Alarm
  6. Electronic lock
  7. Electronic door codelock (PIC16F84)
  8. Moisture alarm
  9. Fridge door alarm
  10. Ultrasonic remote control & alarm system
  11. Sun - Up Alarm
  12. Wire loop alarm
  13. Digital entry lock
  14. Proximity switch
  15. Toxic Gas Detector
  16. LEVEL CROSSING
  17. Door knob alarm (PDF)
  18. Water seepage alarm (PDF)
  19. Micro-power over temperature alarm (PDF)
  20. Personal silent alarm system
  21. Active IR motion detector
  22. A Basic RF Transmitter for PIR Sensors
  23. PIR motion detector
  24. Simple alarm system
  25. Automatic door opener using PIC12C508
  26. Home security project
  27. 5 Zone alarm circuit
  28. Miniature loop alarm
  29. Novel Buzzer
  30. Gate alarm circuit
  31. Modular Burglar Alarm
  32. Motorcycle alarm
  33. Enhanced 5 Digit Alarm Keypad
  34. Enhanced 4 Digit Alarm Keypad
  35. RF Alarm
  36. Single Zone Alarm
  37. Water Activated Alarm
  38. Water level alarm
  39. Perimeter monitor
  40. Digital combination lock
  41. Alarm control keypad
  42. Almost Ultrasonic Motion Sensor
  43. Touch activated alarm system
  44. Combination Lock (PIC16F84)
  45. Low power RFID transponder


  46. Voltar para o Topo
    Amplificadores de potência de áudio e RF
  47. amplificador de 100w rms com o tda7294
  48. 70...100w_dmos_audio_amplifier_with_mute&st-by
  49. 70w-pwr-amp
  50. ampli-lm1875-18w
  51. TDA7294
  52. Amplificador de 60 Watts com tip3055 e 2955
  53. Two transistor audio amplifier
  54. amplificador de 22000 w rms
  55. amplificador stereo de 100w com stk4231
  56. amplificador a mosfet de 100w
  57. Personal stereo audio amp
  58. Headphone amplifier
  59. Amplificador com o tda8571
  60. 1.5W Audio amplifier
  61. Low-level audio amp
  62. 10W amplifier
  63. 80W amplifier
  64. amplificador de Audio com o tda2030
  65. LM383 12V Amplifier
  66. Amplificador de 100w rms com  tip 142 e 147
  67. 100W Amplifier
  68. 18W Audio amplifier
  69. 25W MOSFET amplifier
  70. Headphone amplifier
  71. Portable headphone amplifier
  72. amplificador de three way de 300w
  73. amplificador de 70w rms
  74. amplificador de 310w rms
  75. 2W amplifier
  76. 4W amplifier
  77. 8 watt audio amp
  78. amplificador de 100 e 200w em brigid
  79. 20W Amplifier
  80. 50W Amplifier
  81. amplificador de 120W mosfet irf9540 540
  82. 100W Audio amplifier
  83. 100W RMS Amplifier
  84. 2-Channel Power Amplifier
  85. Push-Pull Class A Amp using type 5687 dual triodes
  86. amplificador com o tda7386
  87. Push-Pull Class A 2A3 Stereo Amp
  88. Single Ended Class A2 SV811-10 Stereo Amp
  89. Audio amplifier output relay delay
  90. Spatial Distortion Reduction Headphone Amp
  91. amplificador de 380w rms
  92. HeadBanger Headphone Amp
  93. 2W Amplifier
  94. TDA2030 8 Watt amplifier
  95. Amplificador Linear de RF
  96. Headphone distribution amp
  97. Headphone monitor amp
  98. 50W audio power amplifier
  99. amplificador de 10w com o tda2003
  100. Bi-Directional 2.4 GHz One Watt Amplifier
  101. Bi-Directional 900Mhz One Watt Amplifier
  102. 20 Watt GaAaFET Power on 2.3 GHz
  103. 1 Watt 2.3 GHz RF Amplifier Using a MRF2001
  104. Subwoofer ativo
  105. 2.3 GHz Power Amplifiers
  106. 2304 and 3456 MHz Power Amplifiers
  107. High quality exponential VCA
  108. 16 Watt amplifier
  109. 8 Watt amplifier
  110. Power amp schematic (PDF)
  111. amplificador de 100w rms
  112. 20 Watt Class-A Power Amplifier
  113. El-Cheapo - A Really Simple Power Amplifier
  114. Single Chip 50 Watt / 8 Ohm Power Amplifier
  115. Hi-Fi Headphone Amplifier
  116. amplificador stereo de 25w com stk4141
  117. 100W Guitar Amplifier
  118. Death of Zen (DoZ) - A New Class-A Power Amp
  119. Soft-Start Circuit For Power Amps
  120. Thermo-Fan To Keep Your Amp Cool
  121. amplificador de áudio stéreo de 600w rms
  122. Audio Amp Output Power Limiter
  123. 55W (Originally 75W) Power Amplifier
  124. 300W Subwoofer Power Amplifier
  125. 20 Watt / Channel Stereo Power Amplifier
  126. Mini bench amplifier (LM386)
  127. 12 Watt Valve Guitar Amp
  128. amplificador de 300w
  129. amplificador de 400w
  130. amplificador de 110w rms com o 2n3055

  131. Voltar para o Topo
    Pré amplificadores de áudio
  132. pré-amplificador com lm741 ou ca3140
  133. sistema de loudnes com pré-amplificador
  134. Microphone amplifier
  135. mesa de som stereo de 3 canais
  136. RIAA phono amplifier
  137. pré-amplificador de microfone
  138. Low impedance microphone amplifier
  139. Dynamic microphone preamplifier
  140. buffer para cd player
  141. Phono preamp
  142. Masthead preamp
  143. tonal ativos com controles dos graves
  144. Preamplifier for microphone or guitar use
  145. Simple microphone preamplifier
  146. crossover ativo
  147. Tube microphone preamp
  148. Simple Stereo Electret Microphone Preamplifier
  149. Simple Stereo Electret Microphone Preamplifier
  150. chave digital de áudio
  151. Phono Preamp
  152. Simple microphone preamplifier
  153. ECM Mic preamp
  154. pré-amplificador com agudos
  155. Hi Fi preamp
  156. Balanced microphone preamp
  157. Audio preamp
  158. pré-amplificador para microfone de eletreto
  159. Electret mic amplifier
  160. Audio preamplifier
  161. pré-amplificador de alta qualidade
  162. Vacuum Tube Microphone Preamp
  163. FET Preamp Cable
  164. Audio preamp
  165. pré-amplificador para mic de eletreto
  166. pré-amplificador de audio
  167. pré-amplificador para captador
  168. pré-amplificador com realimentação híbrida
  169. sistema de loudnes com pré-amplificador
    Voltar para o Topo
    Automotivo, circuitos para carros e motos
  170. Electronic auto stethoscope
  171. Turn signal alarm
  172. Motorcycle turn-signal system
  173. Cigarette lighter 9V adaptor
  174. Analog Tachometer for Gasoline Engines
  175. Headlight On reminder with Light
  176. Adaptive Windscreen Wiper Control
  177. Car clock
  178. Car message display
  179. Car interval wiper
  180. Safety indicator light
  181. Speed limit alert
  182. Grand Cherokee Off-Highway Lights
  183. Engine control unit schematics
  184. Portable CD Player Adapter For Car
  185. Car battery charger
  186. Wireless Auto Tachometer
  187. Alternator Signal Detector
  188. Automotive alarm system
  189. Road ice alarm
  190. Automotive Anti-Lock Brake Control Driver
  191. Headlight reminder
  192. Breath Alcohol Tester controlling a car ignition system
  193. Simple car battery charger
  194. Parking sonar
  195. Fuel injector pulse width monitor
  196. BMW R Series Motorcycle Regulator Schematic
  197. 80188XL Engine Tachometer
  198. Integrate Fuel Pump Wire Security Cut Off with a Turbo Timer
  199. Simple Car Preamplifier and Artificial Earth
  200. FCD (Fuel Cut Defencer)
  201. Interface between GM's 5 Volt 8192 baud ALDL data stream and a PC serial port
  202. 5301 wideband fuel mixture display
  203. Wide Band Fuel Mixture Display
  204. 3rd brake light
  205. 12V to 9V car coverter
  206. Car Nicad charger
  207. Combination lock for car liftgate
  208. BMW motorcycle side stand protection mod

    Voltar para o Topo
    circuitos de aquisição de dados e lógica
  209. Air flow detector
  210. Air flow detector
  211. Strain gauge sensor
  212. Digital Water Wave/Tide/Level Meter (PIC16F876)
  213. Self made data-logger V2.5 (second edition)
  214. Magnetometer
  215. Analog input section based on AD9220
  216. uModem 4+4/8 channel A/D board
  217. ADXL202 accelerometer to CV output
  218. Light direction sensor
  219. 12-Bit ADC interface
  220. Digital thermometer
  221. Universal flight controllers / datalogger
  222. Rain detector
  223. Home Brew Compass Sensor
  224. Using 555 Timer as an A/D converter
  225. ADC0804LCN 8-bit A/D converter
  226. Web-based thermometer project
  227. Low Flow-Rate Thermal Flowmeter
  228. Geiger counter
  229. Differential Capacitance Measurement for Tilt Meter
  230. Honey Bee counter (PDF)
  231. Capacitance type liquid level measurement (PDF)
  232. Thermostat node schematic
  233. Digital PC Oscilloscope
  234. Ultrasonic Range & Imager
  235. Precision Digital Altimeter
  236. Digital compass schematic
  237. Temperature datalogger
  238. Serial Port A/D-converter
  239. Centronics port D/A converters and low-pass filter
  240. LCD Thermometer
  241. Acceleration monitor using Analog Devices ADXL202
  242. Optical sensor using PIC12C508
  243. Wireless Liquid Level Sensing for Restaurant Applications
  244. Accelerometer Schematic
  245. Pressure Sensor-Based Altimeter Circuit
  246. Ultrasonic range finder circuit
  247. 1-wire barometer
  248. Water-level sensor
  249. Addressable ADC
  250. Electronic altimeter using PIC16F877
  251. Wireless weater station

    Voltar para o Topo
    Filtros de rf e para circuitos audio
  252. Galaxy Noise Filter
  253. Low-pass active filter
  254. Filter Circuit for the Earthworm Seismic Data Acquisition System
  255. Active 2nd Order Filters
  256. RC Notch Filter (Twin T)
  257. Multiple Feedback Bandpass Filter
  258. CW filters
  259. Self-tune filter
  260. SSB AF filter
  261. Helical Resonator Notch Filter
  262. 3KHz low-pass filter plus audio amp (PDF)
  263. Active bandpass filters
  264. Bandpass filters
  265. Butterworth filters
  266. Narrow band audio bandpass filter
  267. Inversal notch and bandpass filter
  268. DC Accurate, Active RC Lowpass Filter
  269. Chebyshev Bandpass Filter
  270. Bandpass filters
  271. Chebyshev / Butterworth filters
  272. Biquad Active Bandpass Filter Schematic
  273. "A" Weighting Filter For Audio Measurements
  274. Multiple Feedback Bandpass Filter
  275. Digital signal processor (DSP) for radio communications
  276. 29.85 MHZ bandpass filter schematic
  277. 29.85 MHZ notch filter schematic
  278. LC filter design

  279. Voltar para o Topo
    Jogos e diversão (circuitos)
  280. Visor cradle serial interface
  281. Electronic coin tosser
  282. Electronic craps game
  283. First response monitor
  284. VCR ping pong game
  285. Video ping pong game
  286. MBC5/CPLD for the GameBoy
  287. GameBoy Camera Parallel Port Interface
  288. Mobile robot (PDF)
  289. PSX controler to PC MIDI converter
  290. Dreamcast PC serial adapter
  291. GameBoy Cart Programmer
  292. Memory game
  293. 32 Kb x 8 emulator for the GameBoy
  294. Project: NES to Atari 2600 controller interface
  295. Battery Meter for Pinball Machines
  296. SRX1 (Stephane's Robotic eXperiment 1)
  297. Pine Racecar Victory Judge
  298. Interfacing Sony control stick to Empeg
  299. Electronic Nicad glow plug driver
  300. April Fools LEDs
  301. Pinewood Derby logic
  302. Quiz Master
  303. GameBoy Schematic
  304. GameBoy LCD schematic
  305. GameBoy Power & Cartridge schematic
  306. GameBoy ROM+RAM+MBC1 Cart Schematic
  307. GameBoy MBC1 circuit equivalent
  308. Super GameBoy schematic
  309. Quiz show indicator
  310. Dreamcast interface
  311. Bingo!!! (on your tv)
  312. Slot car TV cronograph
  313. Furby reverse-engineered circuit
  314. Sanyo 20EZ monitor Arcade Game (300k ZIP)
  315. Burger Time Arcade Game (500k ZIP)
  316. Dig Dug Arcade Game (800k ZIP)
  317. Frogger Arcade Game (500k ZIP)
  318. Galaga Arcade Game (542k ZIP)
  319. Gyrus Arcade Game (800k ZIP)
  320. Junior Pacman Arcade Game (400k)
  321. Ladybug Arcade Game (335k ZIP)
  322. Mappy Arcade Game (470k ZIP)
  323. Moon Cresta Arcade Game (300k ZIP)
  324. Mr.Do Arcade Game (554k ZIP)
  325. PacLand Arcade Game (316k ZIP)
  326. Pengo Arcade Game (313k ZIP)
  327. Q*Bert Arcade Game (600k ZIP)
  328. Qix Arcade Game (476k ZIP)
  329. Scramble Arcade Game (600k ZIP)
  330. Time Pilot'84 Arcade Game (870k ZIP)
  331. Xevious Arcade Game (450k ZIP)
  332. Magic Wand Conjuring Trick
  333. Quiz game circuit
  334. E.S.P. Conjuring Trick
  335. Video game system using PIC18F252 (direct video generation)
  336. Video game system using SX28 (direct video generation)
  337. DIT shutterglasses controller
  338. Tic-tac-toe game using PIC16F628
  339. Archery timer
  340. PIC micro Tetris game
  341. Magic lamp, IR remote control jammer and other fun circuits (PDF)
  342. Lego Mindstorms Double Rotation Sensor


  343. Voltar para o Topo
    circuitos usando infra vermelho em controles remotos e outras aplicações
  344. IR detector
  345. Infrared body heat detector
  346. Stereo IR audio receiver
  347. General purpose IR receiver
  348. Wireless IR headphone transmitter
  349. Wireless IR headphone receiver
  350. Infrared remote control shutter release system
  351. Infrared transmitter for locomotives
  352. Infrared gate for door
  353. Infrared circuits for remote control
  354. Serial port controller infrared transmitter (PIC16F628)
  355. IR Receiver (Amplitude Modulated IR)
  356. IR Transmitter for Audio (Amplitude Modulated IR)
  357. Digibox interface
  358. IR remote control
  359. Long Range Infrared Remote
  360. iRDA to TTL interface
  361. 40KHz light receiver (PDF)
  362. 40KHz TV-VCR repeater (PDF)
  363. Micro based PIR to IR remote converter
  364. IR-related ASCII Schematics V1.00
  365. Infrared remote transponder
  366. Build an Infrared night scope
  367. Decoding IR Remote Controls
  368. IR detector
  369. PC IR Remote Control Hardware
  370. PC IR Remote Control
  371. An Ambient-Light-Ignoring Infrared Active Motion Detector
  372. Infrared Transmitter and Receiver schematic diagrams
  373. Pyroelectric Infrared Sensor
  374. Minimal Infrared transmitter for PC
  375. Simple IR transmitter circuit
  376. Simple infra-red detector
  377. AVR (AT90S2313) serial port infrared receiver
  378. Infra Red Switch
  379. IR remote control extender
  380. IR Remote Control Extender Circuit (Mark 2)
  381. IR Remote Control Extender Circuit (Mark 3)
  382. IR Link
  383. IR remote control tester
  384. 40khz IR Tester
  385. 555 timer 40khz IR Oscillator
  386. IR detector / emitter
  387. Fire-Stick infrared remote control
  388. Simple infrared remote control
  389. Infrared / Ultrasonic beacon
  390. Implementing Infrared Object Detection
  391. IR detector for robotics
  392. Computerized Infrared Remote

  393. Voltar para o Topo
    Laser transmissores e fontes de aliemntaçõ para equipqmentos laser
  394. Light beam receiver for laser pistols
  395. 12V supply for He-Ne laser
  396. Laser diode transmitter
  397. Laser power supply
  398. Laser transmitter/receiver
  399. Laser harp
  400. Laser Telephone Receiver Circuit
  401. Fiber Optic Voice Communications
  402. Efficient Laser Supply
  403. 20MHz VCSEL 3mW laser test circuit (PDF)
  404. 10MHz to 20MHz laser light detector (PDF)
  405. Micro-power 40KHz burst laser diode driver (PDF)
  406. 40KHz laser burst detector (PDF)
  407. Modulated laser diode tester (PDF)
  408. Ar/Kr Ion Laser Power Supply
  409. Laser diode power supply circuits
  410. RS-232 Laser Transceiver
  411. HeNe laser power supply
  412. OPT201 Laser receiver
  413. OPT301 Laser receiver
  414. Laser transmitter schematics
  415. Diode Laser Power Supplies
  416. Laser bug circuit
  417. RS-232 Laser Transceiver
  418. Experimental laser data link
  419. Ar/Kr Ion Laser Power Supply Design
  420. Simple laser communicator

  421. Voltar para o Topo
    Circuitos de iluminação e circuitos usando leds
  422. Big 7-segment LED display board with SPI interface
  423. LED Flasher
  424. LED pulser with audible output
  425. IR Illuminator
  426. Flashing Christmas LED display
  427. ICL7660 LED flasher
  428. LM3909 replacement using discrete components
  429. Color fade
  430. LEDs shimmer randomly as though on fire
  431. LED power supplies for AA cells
  432. 1.5 Volt LED Flashers
  433. AC Line Powered LEDs
  434. Astable Multivibrator
  435. 9 Second Digital Readout Timer
  436. 9 Second LED Relay Timer
  437. 16 Stage Bi-Directional LED Sequencer, other sequencer and flaser circuits
  438. 10 Stage LED Sequencer
  439. 28 LED Clock Timer
  440. Fading Red Eyes
  441. Two Transistor LED Flasher
  442. 16 Stage Bi-Directional LED Sequencer
  443. Expandable 16 Stage LED Sequencer
  444. LED Photo Sensor Circuit
  445. LED chaser
  446. 7 Segment LED Counter
  447. 7 by 10 LED Moving Sign ( 27C512 EPROM)
  448. Sequencial LED Flasher with Reversable Direction
  449. Tri Color LED Controller with Serial Interface
  450. 1.5V LED flasher B (PDF)
  451. Low current LED flasher (PDF)
  452. 1.5V LED flasher A (PDF)
  453. Flashing LED advertising badge (PDF)
  454. Flashing LED advertising badge (PDF)
  455. Pulsed LED test circuit (PDF)
  456. Low battery voltage flasher (PDF)
  457. Adjustable flashing LED
  458. PWM white LED drivers
  459. Heart of LEDs
  460. Christmas Star
  461. Christmas tree
  462. LED Counter
  463. PIC16F84 LED chaser
  464. PIC16F84 LED signboard
  465. PIC16F84 LED signboard 2
  466. White LED circuits
  467. Assorted LED circuits
  468. LED Mood Light
  469. LED Audio VU Meter
  470. Robot Beacon rotating light using PIC12C508
  471. LM3909 LED flasher
  472. Animated LED signboard (PIC16C84)
  473. Picxie 2 - 8x8 Animated LED Signboard

    Voltar para o Topo
    Circuitos relacionados com iluminação e controle
  474. Dimmer AC
  475. Garden light switch
  476. DMX lighting and special effects
  477. Microcontroller Multichannel Light Dimmer
  478. Digital timer light switch
  479. Hand clap lamp control
  480. Radio controlled light switch
  481. Disco style Strobe Light
  482. Varying Brightness AC Lamp
  483. 12 Volt Lamp Dimmer
  484. 120VAC Lamp Chaser Using Solid State Relays
  485. Flashing Neons (NE-51 / NE-2)
  486. Sequencing Neons (NE-51 / NE-2)
  487. Touch Activated Lamp
  488. 220V Flashing lights
  489. Coutesy lamp
  490. Bedside lamp timer
  491. TRIAC light dimmer
  492. 12VDC Fluorescent Lamp Driver
  493. Strobe light
  494. Adjustable Strobe Light
  495. RHINO8 EL Sequencer
  496. Light Sequenced Candelabra
  497. Light timer
  498. 5W Fluorescent light intensity modulator (PDF)
  499. 1W Fluorescent lamp night light (PDF)
  500. Low-voltage light dimmer
  501. Light chaser
  502. 4-channel dimmer rack
  503. PIC16F873 light controller
  504. Disco light controller
  505. Neon desklamp
  506. Electronic night light
  507. Neon lamp dimmer
  508. LED Mood Light
  509. LX-800 Lighting system
  510. Xenon Strobe Light
  511. Lamp flasher/dimmer

  512. Voltar para o Topo
    Saúde e circuitos relacionados com hospital
  513. Snore alarm electronic device
  514. Heartbeat transducer
  515. ECG Amplifier
  516. EKG/EEG circuit
  517. Radiation Dosage-Rate Meter
  518. Heartbeat monitor
  519. Cranial Electrotherapy Stimulator
  520. Automated crib lights
  521. Jogging timer
  522. Tan timer
  523. Muscular Bio-stimulator
  524. Pedometer
  525. Simple lie detector
  526. EEG preamp, anti alias filter and isolation circuit
  527. Self Contained Electromyograph (EMG)
  528. Cardiac monitor
  529. Galvanic Skin Response (GSR) Schematic
  530. Brain-Wave Machine
  531. Lie detector
  532. Simple lie detector
  533. ECG project page
  534. The ESP SIM (Sound Impairment Monitor)
  535. Respiration system

    Voltar para o Topo
    Microcontroladores circuitos, programadores e placa de desenvolvimento para microchip pic, 8051, avr, motorola, basic step e outros
  536. CURSO BÁSICO DE PIC
  537. Microcontroladores PIC E-book gratuito do Pic16f84
  538. 3dip8 programador e Microchip forum
  539. ART2003 Pic programador
  540. Ecopic Programador
  541. GTP-04 e GTP-07  programador
  542. GTP-Lite Programador
  543. GTP-USB-#0 e #1
  544. GTP-USB-#F1
  545. GTP-USB-232
  546. JDM programmer
  547. Pablin
  548. Paraprog
  549. PG3B
  550. Pic800
  551. Picburner
  552. PP2
  553. Propic2
  554. Gravador de PIC PROGPIC II Revista mecatrônica fácil
  555. RCD Programmer
  556. Gravador JDM com fonte externa (recomendável)
  557. PROGRAMADOR DE MICROCONTROLADORES PIC POR PUERTO USB
  558. PIC based packet radio encoder (PDF)
  559. Atmelprog
  560. Avr2313mod1
  561. Avr8515_eval-board_node13_gpl2
  562. Avr_zigbee_802.15.4_reva01
  563. avrmp3
  564. Evaluationboard_at89xx
  565. ICD2-2
  566. ICD2
  567. PIC18f452
  568. Wineprom
  569. RS485-Version of the SAB80C535-Microcontrollerboard
  570. PC IR receiver based on PIC16F84
  571. Record and play fast 1-bit sound on a PIC micro
  572. AT89C2051/4051scanning 7-segment display and keypad
  573. AT89C2051/4051 Driving dot LED
  574. AT89C2051/4051stepper motor interface
  575. AT89C2051/4051connecting dumb terminal
  576. Motorola 68K SBC (single board computer)
  577. 8051 SBC (single board computer)
  578. Simple RS232C Level Converter using Transistors
  579. Motorola 68HC11 evaluation board
  580. C-52 EVB Robot Controller
  581. Mains clock controller using AT89C2051
  582. AT89C2051/4051 Easy-Downloader
  583. AT89C51/52/55 Easy-Downloader
  584. PIC16F84 programmer
  585. PIC16F84 miniature real-time controller
  586. Isolated RS232 for PIC16F84
  587. PIC16F84 debugging terminal
  588. MiniLOGGER V1.0
  589. Analog datalogger based on T89C51RD2
  590. Atmel 89C Series Flash Microcontroller Programmer
  591. Atmel 89C2051 prototype board
  592. AT89C2051 real-time controller
  593. PIC12C508 Night-light saver
  594. AT89C2051 Night light saver
  595. Atmel 8051 Flash Based-Microcontroller Programmer
  596. AT89C2051 Digital thermometer and clock
  597. 4-Channel Timer using Atmel 89C4051 and MAX7219 display driver
  598. PIC16F84 CW decoder (PDF)
  599. 12C508 Smart Lock
  600. 80C31 stepper motor controller
  601. Build a PIC controlled DDS VFO, 0 to 6 MHz
  602. PIC controlled DDS VFO, 0 to 6 MHz
  603. Basic Stamp Lightning Activity Monitor
  604. Parallel AVR programmer
  605. PIC16F84 line following robot
  606. PIC16C505 IR / wireless remote control
  607. Automatic door opener with PIC12C508
  608. RS485-like multi-drop bus with half duplex serial protocol
  609. WWWpic2 - A web server in a PIC
  610. PIC16F84 web server
  611. 50 MHz frequency counter, voltage meter & SWR/PWR indicator
  612. Microcontroller board using the Atmel AVR AT90S8535
  613. Programmer PIC16F84,12C50x and EEPROM 24Cxx
  614. RDS Encoder - digital part
  615. PIC programmer for serial port
  616. Fully functional PS/2 mouse based on the PIC16F84
  617. PIC 18 programmer (PIC18F458, PIC18F452, PIC18C252, PIC16C745, PIC18F6620, PIC18F6720)
  618. Foreign vocabulary recollector
  619. Illuminate holiday destinations on a world map
  620. Embedded system to send e-mails (small TCP/IP stack)
  621. Speaking clock using PIC & ISD device
  622. Speaking doorbell using PIC & ISD device
  623. Whistle detector using 8-pin PIC
  624. PIXpand
  625. PIC16F877 to IDE interface
  626. 68HC11 stepper motor control
  627. 90S2313 AVR Robot Board
  628. POCSAG encoder/decoder
  629. Network Time Protocol AVR Clock
  630. DS1820 Temperature Sensor Readout Unit
  631. Rotating Sprocket Wheel Generator (PIC16F84)
  632. Talking PIC - based on SP0256
  633. Serial to parallel converter using the AT89C2051
  634. AT89C2051 serial COMs to LED driver
  635. PIC16F877 Programmer And Development System
  636. DS1820 Arbiter V2.00 Schematic
  637. Microchip PIC ICSP implementation
  638. 101 AT Keyboard to ASCII Decoder using 68HC705J1A MCU
  639. LCD Serial Terminal
  640. Propellor clock (PIC16F84)
  641. Optical sensor using PIC12C508
  642. Interfacing S-7800A to PIC16F877
  643. A Scenix (and PIC) Programmer
  644. MMC to PIC16F876 circuit diagram
  645. 8088 maximum mode SBC
  646. EZ80 single board computer schematic (Z80)
  647. 8051 Development System Circuit Board
  648. Voice recording and message retrieval system
  649. Interfacing a GPS to an LCD using a Microcontroller
  650. Long-period watchdog timer
  651. PIC16F84 Range Finder Project
  652. Generate video signals in real-time using a PIC16F84
  653. PIC ICD
  654. PIC Project #1 - RS232 to I2C Interface
  655. Galvanic decoupling of I2C bus
  656. Programmer PIC16F84,12C50x and EEPROM 24Cxx
  657. Dual PIC16C84 prototype board
  658. Graphic LCD interface
  659. FSK modem with PIC16C84
  660. Talking YODA project (PIC16C84)
  661. PIC16F84/PIC16F87x-In-System-Programmer
  662. Microcontroller interface for 5KW microwave oven
  663. Using an I2C Serial EEPROM with a Basic Stamp 2
  664. PIC16F84 Based Morse Code Reader
  665. AVR-Based Serial Port IR Receiver
  666. Interfacing piezo elements to a microcontroller
  667. Victoria TAFE programmer (based on AT89C2051)
  668. JDM programmer
  669. PIC micro programmer
  670. Speech recognition using HM2007
  671. PIC microcontroller servo motor interface
  672. PIC micro multiple servo motor interface
  673. PIC16F84 countdown timer
  674. PIC16F873 ultrasonic range meter
  675. PIC16F873 Digital clock
  676. PIC16F873 remote display
  677. PIC16F84 stepper motor controller
  678. Way small web server
  679. PICADC - a free, PIC based "intelligent" A/D converter
  680. 8051 development system circuit board
  681. 8088 maximum mode single board computer (SBC)
  682. Basic 89C2051 / 89C4051 circuit diagram
  683. Debugging dump terminal for 89C2051 designs
  684. Easy debugging terminal
  685. Galvanic decoupling of I2C bus
  686. Circuits interfacing piezo elements to a microcontroller
  687. Driving a TRIAC using a PIC12C508
  688. Isolated RS232C for PIC16F84
  689. Microchip ICD (in-circuit debugger) circuit diagram
  690. Microchip PIC ICSP implementation circuit diagram
  691. Interfacing NMEA GPS to LCD using PIC16F84
  692. PIC ICD (in-circuit debugger)
  693. PIC16C71 morse code callsign generator
  694. PIC16F84 to LCD interface
  695. PIC16F84 I/O expander with PicBasic
  696. Scanning 7-Segment & Keypad
  697. 10-key serial keypad encoder
  698. Simple RS232C Level Converter using Transistors
  699. Talking PIC microcontroller using SP0256
  700. PIC-Programmer 2
  701. Connecting PIC12C508 8 to 93AA46 serial eprom
  702. KD7LMO Micro Beacon (PIC18F252)
  703. GPS LCD Display Project
  704. PIC16F84 LED chaser
  705. PIC micro LED projects
  706. PS/2 keyboard keystroke logger based on Atmel 89C2051
  707. Electronic distance meter based on Motorola 68HC908QY4
  708. Fan timer based on Motorola 68HC908QT2
  709. Atmel AVR and 8051 series ISP programmer
  710. AT89C2051 line-follower robot
  711. Night light saver (PIC12C508)
  712. USB and GLCD expansion board for 8051 SBC
  713. Basic stamp interface circuits
  714. Microcontroller sensor and actuator interfaces
  715. Giant money counter (PIC16F876)
  716. PIC12C509 logic gate replacement for nitrogen filler
  717. PIC demo board
  718. PIC12C509 Gym Timer
  719. PIC LCD and Keypad driver
  720. PIC12C508 Phase Controller for 2kW heater
  721. PIC16F84 TRIAC / IGBT brightness phase controller
  722. PIC16F84 pulse monitor with date/time output (ZIP)
  723. Programmer for the 68HC705C8 MicroController
  724. 27c801 EPROM Programmer Project
  725. LCD to PIC16C54 schematic
  726. 68HC11 based RDS decoder
  727. Acceleration monitor using ADXL202 and AVR
  728. 40+ MHz 5-digit frequency counter with an AVR 2313
  729. Interfacing DRAM to AT90S8515
  730. Temperature monitor/controller: AVR 2313 / DS1621
  731. PIC micro to ISA bus interface
  732. PIC16C84 VT-52 Emulator for Linux
  733. Microchip PIC ICD (in-circuit debugger)
  734. Tony Nixons Pocket Programmer (PIC)
  735. PicoWeb V5.1 (AT90S8515) tiny web server
  736. Atmel 89C2051 In-Circuit Programmer Schematic
  737. 8051 Development System Circuit Board
  738. 8051 Development System Circuit Board
  739. Microprocessor using Xilinx FPGA
  740. Temperature controlled based on AT89CX051
  741. I2C LCD interface
  742. AFSK 1200 Modem based on PIC16C620
  743. PicCon - Hidden Radio Transmitter Controller
  744. PIC16F84 tone generator with source code
  745. PIC16F84 tone generator
  746. PIC16F84 tone generator (6-Bit)
  747. AVR Beacon Super Keyer
  748. AVR Frequency Counter
  749. AVR Digital Voltmeter
  750. AVR Signal Generator
  751. Ser-Key 10-Key Serial Keypad Encoder
  752. 2-wire LCD interface using PIC16CF84
  753. PIC16F84 Serial I/O-expander with PicBasic
  754. RS 485-RPT Schematic
  755. Camera remote control system using Basic Stamp
  756. Low cost Atmel in-system programmer
  757. Ultra low-cost programmer for AT90S family
  758. AVR to USB interface
  759. Programable LCD counter with memory backup based on Atmel AT90S1200A
  760. Connecting AT90S2313 with LCD display 2x16 char and 4x4 keypad
  761. Atmel AVR RCEN fuse bit programmer
  762. Electronic safety lock based on ATtiny26
  763. GSM SMS remote control using AVR microcontroller
  764. 128x64 LCD Driver for AT90S2313 (ZIP file)
  765. Connecting LED to PIC Micro I/O pins (PDF)
  766. Microprocessor RS-232 Reset
  767. AT90S8515 experimenter board
  768. Multi-chip programmer for PIC microcontrollers
  769. Buffered PIC chip interface
  770. A PIC-Based Keyboard Emulator
  771. PIC-based robot
  772. ScanMate audio activated recorded
  773. PIC vacuum fluorescent display interface
  774. PIC18F252 bootloader schematics
  775. PIC16F876 Datalogger
  776. GPS Repeater
  777. Kodak DC-20 camera interface (PIC12C509)
  778. Kodak DC-20 camera interface (PIC16F84)
  779. PIC ICD in-circuit debugger circuit diagram
  780. PIC programmers for parallel port
  781. Wisp628 ISP Microchip PIC Programmer
  782. WLoader - PIC16F877 application loader / bootloader
  783. Nixie clock (PIC16F876)
  784. Zilog Z80 thermostat embedded web server
  785. Picxie 2 - 8x8 Animated LED Signboard (PIC16F84) Picxie 2 - 8x8 Animated LED Signboard
  786. 10 tricks for interfacing to the PIC16C508
  787. Interfacing the PIC16C508
  788. PIC 5x7 display
  789. Analog to digital conversion notes
  790. Multi-chip programmer

    Voltar para o Topo
    Vários circuitos de áudio
  791. Electronic siren
  792. Two-tone siren
  793. Underwater microphone
  794. Code practice oscillator
  795. Noise generator
  796. Electronic whistle
  797. Twin-T Audio Sine Wave Oscillator
  798. 1.5V Audio Amplifier
  799. Low Power Op-Amp - Audio Amp (Intercom)
  800. 555 Tone Generator (8 Ohm Speaker)
  801. 3 Transistor Audio Amp (50 milliwatt)
  802. Low Frequency Sinewave Generator
  803. Automatic Charger for Battery Operated Hi-Fi Preamps
  804. Audio level indicator
  805. Room noise detector
  806. Amplifier timer
  807. Bell ring generator
  808. Amplified ear
  809. Precision audio millivoltmeter
  810. Six-channel Mixer and Amplifier
  811. Audio Signal Source
  812. Analog VU meter
  813. Voltage controlled amplifier
  814. Audio graphic equaliser
  815. Intercom preamp
  816. FET audio mixer
  817. Microphone mixer
  818. Tone control
  819. Digital volume control
  820. Sound level meter
  821. CMOS IC audio oscillator
  822. Three band Active Tone Control
  823. Automatic gain control (AGC) circuits
  824. Audio frequency meter
  825. Bull Horn
  826. Sound Mixer/Amplifier
  827. Very loud beeper (PDF)
  828. Digital noise generator (PDF)
  829. Tone display system
  830. Tube amplifier
  831. Condenser microphone hookup
  832. Phase shifter
  833. Paradoxical Sound Syntheizer
  834. Various tube crossover circuits
  835. Bias circuits
  836. Audio line isolator
  837. Dynamic microphone to electret microphone input
  838. Line level signal to microphone input adapter
  839. Simple two line output combiner
  840. Electret microphone powering circuits
  841. Use amplifier phono input as line level input
  842. Speaker signals to line level inputs
  843. Spring reverb unit
  844. Sine wave generator
  845. Simple amplifier
  846. 3-Band equalizer
  847. 6-Input mixer
  848. Doorphone intercom
  849. Stereo line driver
  850. Audio notch filer
  851. Peak reading audio level meter
  852. Tone control
  853. Speaker Microphone Circuit
  854. Electronic canary
  855. Electronic siren
  856. Microphone phantom power supply
  857. Voltage Controlled Mixer w/Modulator
  858. Dual Voltage Controlled Oscillator w/Modulator
  859. Dual Voltage Controlled Filter w/Modulator
  860. Stereo Ducker
  861. MS Stereo Decoder
  862. MS Stereo Microphone
  863. RIAA Equalized Stereo Phono Preamp
  864. Tube active crossover
  865. Improved PL tone decoder
  866. Magnetic cartridge amplifier
  867. LM358 preamp
  868. Sound detector
  869. Tone detector
  870. Tone generator
  871. Warbler
  872. Voltage Controlled Panner
  873. Low Noise Microphone Preamplifier
  874. Bridging Adapter For Power Amplifiers
  875. Simple Surround Sound Decoder
  876. Simplest Ever Amplifier Bridging
  877. Stereo Width Controllers
  878. Power Amplifier Clipping Indicator
  879. Phono Preamps For All
  880. Digital Delay Unit For Surround Sound
  881. Parametric And Sub-Woofer Equaliser
  882. High Quality Sound Mixer
  883. Loudspeaker Protection and Muting
  884. Direct Injection Box for Recording & PA Systems
  885. Minimalist Discrete Hi-Fi Preamp
  886. Signal Detecting Auto Power-On Unit
  887. Load Sensing Automatic Switch
  888. Amplifier thermal protection
  889. Active Sub-Woofer and Controller
  890. Balanced Line Driver & Receiver
  891. VU And PPM Audio Metering
  892. Variable Amplifier Impedance
  893. Linkwitz Cosine Burst Generator
  894. Low Noise Balanced Microphone Preamp
  895. Fast Audio Peak Limiter
  896. Subwoofer Equaliser
  897. Surround Sound Decoder Mk2
  898. Audio mixer

  899. Voltar para o Topo
    Miscelânea (vários circuitos)
  900. Ultrasonic radar
  901. Mobile APRS / GPS tracking system
  902. Electronic fish lure
  903. Ultrasonic sound receiver
  904. Experimental data transmitter for fiber optics
  905. Experimental fiber optic receiver
  906. Ion detector
  907. Darkness monitor
  908. Electroscope
  909. Simple event counter
  910. Geiger counter
  911. Light detector
  912. Short-circuit beeper
  913. LM 1800 FM stereo decoder
  914. Glitch detector
  915. MAX924 bar-graph level gauge
  916. Ultrasonic generator
  917. Negative ion generator
  918. ELF Monitor
  919. Chaos generator
  920. Simple BFO metal detector
  921. Voltage Comparator Information And Circuits
  922. Build Your Own Digital Setting Circles For Your Astronomical Telescope
  923. PL tone generator (NE567)
  924. Bat detector
  925. Bat detector microphone pre-amplifiers
  926. Full-duplex doorphone with 3 wires connection
  927. G Strain energy absorber
  928. RDS Encoder
  929. Toggle Switch Debounced Pushbutton
  930. Discrete Set/Reset Flip Flop
  931. Monostable Flip Flops (one shot)
  932. Discrete Bistable Flip Flop
  933. Talking Morse Code Practice Computer
  934. Plant watering watcher
  935. Capacitance sensor
  936. Whistle responder
  937. Nocturnal animals whisker
  938. 12V DC electronic door chime
  939. Biasing Op-Amps into Class A
  940. Parasite zapper
  941. Bleeper box for time reference
  942. Analog computer
  943. BayComm packet modem
  944. Morse monitor
  945. HamComm modem interface
  946. Morse paddle keyer
  947. UV light box
  948. Hardware Random Bit Generator
  949. Random noise generator
  950. Analog pulse counter
  951. Analog opto-isolator
  952. Pulse width modulators (PWM)
  953. Pulse width to voltage converter
  954. Fantastic Atom Expander
  955. Black Light
  956. Computerize Your Room/Home
  957. Flash slave trigger
  958. Suddent ionospheric disturbance (SID) receiver
  959. A Visual CW Zero Beating Aid
  960. A two-way Morse practice set
  961. Magnetic levitation device
  962. Tesla power receiver
  963. Lazer Tag Equipment Modifications
  964. Garmin GPS data interconnect
  965. Inexpensive APRS Weather Station
  966. Walking robot
  967. Basic op-amp circuits
  968. Power line FM intercom
  969. Intercom circuit
  970. Lightning Storm Detector
  971. Large LCD Display Buffering Driver
  972. Text to speech converter
  973. Ion detector
  974. 1uS light pulse descriminator plus F to V converter (PDF)
  975. Broadband 2MHz optical fiber receiver (PDF)
  976. Modulated light received (PDF)
  977. 1uS light pulse receiver plus post amp (MISC)
  978. Broadband 5MHz optical fiber receiver (PDF)
  979. High-speed light receiver (PDF)
  980. Basement doorbell beeper (PDF)
  981. Time to dust indicator (PDF)
  982. Low-power optical interrupter (PDF)
  983. Simple nitrogen spark generator (PDF)
  984. Ultrasonic transducer oscillator circuit
  985. Build logic gates using discrete parts
  986. Jacob's Ladder
  987. Sudden Ionospheric Disturbance (SID) Receiver
  988. A selection of robotics projects
  989. Bat detector (new)
  990. Vat detector (old)
  991. Variety of quick designs
  992. Gold wafer (smartcard) programmer
  993. Making a FRED photopopper
  994. GPS receiver support kit
  995. Griffith Observatory Tesla Coil
  996. Fogger smoke machine
  997. Dinsmore 1490 digital compass
  998. Geiger counter
  999. Electric field disturbance monitor
  1000. Inexpensive seismometer project
  1001. Digital dial
  1002. Speech recognition using HM2007
  1003. GPS receiver interface
  1004. Doorbell for the Deaf
  1005. Electromagnetic field detector
  1006. Insect Repellant
  1007. High Quality Intercom
  1008. Magnetic Gun.
  1009. Metal detector
  1010. Static Electricity / Negative Ion Detector
  1011. Ultrasonic dog whistle
  1012. Popular Electronics Ultrasound Detector
  1013. An Inexpensive X-ray Machine
  1014. Navigator 555A radio direction finder (RDF) circuit diagram
  1015. Magnetic levitation circuit
  1016. PE3342 Programmer Schematic
  1017. u-Blox GPS receiver board
  1018. Assorted digital circuits
  1019. Basic electronic circuits
  1020. Miscellaneous simple circuits
  1021. Digital Call Sign Annunciator
  1022. Monitor output from Motorola Oncore GPS engine in HP Z3801A in GPS Disciplined Oscillator
  1023. Ultrasonic switch
  1024. Sound finding cricket with phase detector
  1025. Sound finding cricket
  1026. APRS GPS tracker schematic (PIC16C73)
  1027. Common Ground for Older VPW Circuit
  1028. Very basic circuits
  1029. Bat detector
  1030. FCTS Project
  1031. Smooth Tone Clickless CW Sidetone Generator
  1032. Morse Code Beacon Keyer
  1033. Lightning Activated Camera Shutter Trigger
  1034. Simple metal detector electronic circuit
  1035. Three Power Supplies for the Garmin GPS-20 Sensor Board
  1036. Driving N-channel FETs from TTL
  1037. Miniature Self-Powered Autonomous Robot
  1038. Morse Code Practice Keyer 1
  1039. Morse Code Practice Keyer 2
  1040. 741 Light Sensor
  1041. Fluid level detector
  1042. The Aisin-Seiki GPS-Receiver (The "US$20 GPS")
  1043. Morse code display
  1044. Intercom schematic
  1045. Scaling ADXL50 accelerometer output

  1046. Voltar para o Topo
    Modelismo e controle remoto
  1047. Snake throat muscle controller
  1048. Handy cricket for robotic applications
  1049. Incline Railway Control Circuit
  1050. A Receive Signal Decoder
  1051. 27Mhz toy car receiver
  1052. 27Mhz toy car transmitter
  1053. One ounce rocket ejection timer
  1054. LED traffic lights
  1055. Two-tone siren
  1056. Proportional radio remote control
  1057. Alf: The Robotic Matchbox car
  1058. Seaplane schematic
  1059. Model Rocket with Video Camera
  1060. Signal breaking module
  1061. RF serial link for robot
  1062. PIC based rocket altimeter
  1063. Robot with PIC16F84 brain & InfraRed eyes
  1064. 0-10V control for RC servos
  1065. Robotic microcontroller board
  1066. Multi Rocket Launcher
  1067. Model rocket launch controller
  1068. Pad launch controller for model rockets
  1069. Simple flashing light circuit
  1070. Simple flashing light circuit
  1071. A dual alternating flashing light circuit
  1072. Simple flashing light circuit
  1073. A dual tandem flashing light circuit powered by a 9 volt battery
  1074. Simulate the Gyralite (dual flashing headlights).
  1075. Simple train detector using ambient light and a photocell
  1076. Simple charge rate monitor
  1077. Deluxe charge rate monitor
  1078. "CLONEPAC" memory module for Futaba 8UAF/8UAP
  1079. Battery pack discharger
  1080. Plane locator
  1081. Plane locator 2
  1082. Battery low voltage alarm
  1083. Battery low voltage alarm 2
  1084. Ultimate battery low voltage alarm
  1085. R/C digital camera controller
  1086. R/C helicopter camera
  1087. Building an RF Remote Control System
  1088. Motor walker circuit
  1089. 250-amp Speed Controller for RC cars
  1090. Spider robot electronic project page
  1091. Two tone train horn
  1092. R/C Emergency locator alarm
  1093. Remote switch for radio-control aircraft accessories
  1094. Radio Control Battery Backup
  1095. Glow Plug driver for model engines

  1096. Voltar para o Topo
    Motor e circuitos de controle
  1097. Bridge head
  1098. PWM motor controller
  1099. Transistor relay driver
  1100. Latching relay driver
  1101. Relay delay circuit
  1102. Touch switch
  1103. Low voltage DC motor speed controller
  1104. Flashing neon christmas lights
  1105. Three input first response monitor
  1106. Switch-on delay circuit
  1107. Electronic thermostat
  1108. LM3911 temperature controller
  1109. Programmable light-activated relay
  1110. Simple 10 Stage Control Box
  1111. One component stepper motor driver
  1112. Dual Stepping motor drivers using UDN2540
  1113. PWM DC motor control with SG3525
  1114. Stepper Motor Driver using TEA3718/3717
  1115. Microstepping with PBM3960 and TEA3718
  1116. DC Motor Driver with L6203
  1117. Stepper Motor Driver using L298 and L297
  1118. Several stepper motorol control circuits
  1119. Wireless RF PWM dual motor controller
  1120. H Bridge Motor Control Circuits
  1121. Motor speed controllers
  1122. Ceiling fan speed control
  1123. Delayed off light switch
  1124. Deoderizer fan timer
  1125. Electronic Thermostat Relay Circuit
  1126. Interfacing 5 volt CMOS to 12 volt loads
  1127. Light Activated Relay
  1128. CMOS Toggle Flip Flop With Relay(CD4013)
  1129. 555 Timer Monostable Circuit Using Pushbutton
  1130. Dual Channel Servo Pulse to H-Bridge Interface
  1131. Current loop interface
  1132. Switching solenoid driver
  1133. Modular relay system
  1134. Light/dark detector
  1135. Pulse Width Modulation DC Motor Control
  1136. Stepper motor controller
  1137. Touch switch
  1138. Pump controller
  1139. H-Bridge motor controller (5 amps, 100 watts)
  1140. Dual Channel Servo Pulse to H-Bridge Interface
  1141. Servo pulse to PWM converter
  1142. 12V Sump Pump Control
  1143. Rolling code 4-channel UHF remote control
  1144. DC Motor Speed Controller
  1145. 3 Phase Brushless DC Motor Xtal Based Controller
  1146. DC motor controller
  1147. Garden moisture controller
  1148. Overload Voltage Protection with Automatic Reset
  1149. Pulse Width Modulator
  1150. Pulse Width Modulator Motor Speed Control
  1151. Pushbutton one-shot and latch (PDF)
  1152. Charge coupled bi-directional power MOSFET relay (PDF)
  1153. Finger touch activated switch (PDF)
  1154. Machine vibration triggers hour meter (PDF)
  1155. Solid state relay (PDF)
  1156. Line-powered Xenon flash transmitter (PDF)
  1157. 9V Xenon photoflash controller (PDF)
  1158. AC switching with TRIAC from TTL
  1159. Control 120VAC relay with TTL
  1160. Driving a relay with a CPU
  1161. Power-line Appliance Controller
  1162. Simple Switched Servo Driver
  1163. Combination-controlled, fully customizable RF remote control
  1164. Thermoelectic controller (scriptable thermometer)
  1165. Stepper motor positioner
  1166. Stepper motor driver
  1167. Thermostat
  1168. Frequency switch
  1169. PIC16F84 RF remote controller
  1170. Stepper motor controller
  1171. H-Bridge shematic
  1172. DS1821 programmable thermostat
  1173. Hot Water Tank Indicator
  1174. Temperature monitor
  1175. Cold activated switch
  1176. Voltage comparator switch
  1177. Dark activated switch
  1178. DC Push Button Motor Control Circuit
  1179. Light detector
  1180. DC Motor Reversing Circuit
  1181. Sound operated switch
  1182. LDR light/dark activated relay switch
  1183. Touch Switches
  1184. 6090 digital decoder schematics
  1185. Assorted relay control circuits
  1186. Adjustable Voltage motor controller
  1187. Serial servo controller
  1188. DC Motor-Driver H-Bridge Circuit
  1189. PWM Motor Speed Controller / DC Light Dimmer
  1190. Constant Temperature Circuit
  1191. PWM DC Motor Speed Control
  1192. Solenoid starter
  1193. CO2 controller for planted tanks
  1194. Light activated relay
  1195. Delayed shutter control for Kodak DC-20
  1196. Gasoline generator automatic throttle controller
  1197. Block power switching module
  1198. MOSFET H-BRIDGE schematic and theory

    Voltar para o Topo
    Music and audio related circuits
  1199. Audible metronome
  1200. Visual metronome
  1201. Peak-reading meters
  1202. Octave screamer
  1203. Amiga MIDI interface
  1204. Apple Mac to MIDI synthesizer interface cable
  1205. Apple Macintosh MIDI interface schematic (basic version)
  1206. Apple Macintosh MIDI interface schematic (deluxe version)
  1207. Standard MIDI to MIDI interface cable diagram
  1208. Simple MIDI switcher
  1209. MIDI interface / cable tester
  1210. MIDI keyboard
  1211. MIDI merger schematic
  1212. 25-pin PC serial port to MIDI synthesizer interface cable
  1213. 9-pin PC serial port to MIDI synthesizer interface cable
  1214. Serial MIDI interface
  1215. Microcontroller MIDI interface
  1216. MIDI keyboard circuit
  1217. Spring reverb unit
  1218. Colour organ light
  1219. MP3 Player
  1220. Metronome and pitch generator
  1221. Mini metronome
  1222. Compact Flash / IDE MP3 Player MKI
  1223. Simple colour organ
  1224. Guitar fuzz effect
  1225. 8 note tune player
  1226. Colour (Sound) Organ
  1227. Transisor organ
  1228. BookPC Car MP3 Player
  1229. Yet Another Mobile MP3 Player
  1230. Wave Multiplier for music synthesizers
  1231. Vibrato Circuit for Guitar, Steel, Bass, Etc.
  1232. MIDI status indicator
  1233. Zonk Machine and Treble Booster
  1234. Simple line mixer
  1235. Simple MIDI tester
  1236. MIDI Controller Footpedal
  1237. DIY Serial MIDI Interface (80C51/80C31 Version)
  1238. Electronic metronome
  1239. Sound Effects Generator
  1240. Sound Effects Generator 2
  1241. Digital Guitar Tuner
  1242. Drum tone oscillators
  1243. Analog MIDI synthesizer
  1244. Spring reverb
  1245. MIDI to CV interface
  1246. Dual phantom power pre-amp
  1247. Four channel fuzz box
  1248. Theremin controller
  1249. Vocal zapper
  1250. MIDI drum machine project
  1251. MIDI Drum Machine Analog Input Schematic
  1252. Guitar Reverb Pedal
  1253. Guitar Tremolo Unit
  1254. Spring Reverb Unit For Guitar
  1255. Ultra Simple Bass Guitar Compressor
  1256. Vox AC30 Guitar Amplifier Simulator
  1257. Guitar Vibrato Unit
  1258. Musical Instrument (Expandable) Graphic Equaliser
  1259. Midibox 64

  1260. Voltar para o Topo
    Pcs and peripheral ideas and circuits
  1261. Fonte 13.7 Volts pc atx power suply based
  1262. PC IR Remote Control Signals
  1263. Plotter caseira
  1264. I2C printer port adaptor
  1265. RS232C Level Converter
  1266. PC electrically isolated RS422 interface using SN75176B or MAX485
  1267. PC electrically isolated RS485 interface using MAX487 or SN75176B
  1268. Short circuit protected power supply from PC 12V supply
  1269. Isolated Full Duplex RS232C Interface
  1270. RS232 DB-9 switch to flip between two serial ports
  1271. DB-9 Connector to DB-25 (both RS-232)
  1272. Mac Serial Port (RS-422 DIN-8) to RS-232 DB-25
  1273. Modem Rockwell RCV336/ACF model V1433VQR ext.
  1274. Genius Mouse schematics
  1275. EEPROM programmer
  1276. Commodore 64 24-bit parallel port interface with 8255
  1277. Sound Card Interface with Tone Keyer
  1278. RGB oo Monochrome converter - Matches impedance of PC to CCTV monitor
  1279. Ericsson phone to PC serial port interface
  1280. PC serial port receiver
  1281. Parallel port relay interface
  1282. ISA 48 I/O digital card
  1283. PC infrared iRDA interface using TFDS 4500
  1284. Jupiter card programmer
  1285. USB to RS232 Dongle
  1286. Parallel (Printer) Port Interface
  1287. RS-232 line monitor and loopback cables
  1288. The KD2BD Pacsat Modem
  1289. A Serial Infrared Remote Controller
  1290. PC Serial and Parallel Port Software and Interfaces
  1291. Interfacing 16x2 character :LCD to parallel port
  1292. RS-232 Protocol Analyser
  1293. Interface cable for Casio QV-200 digital camera
  1294. Radio clock for PC's
  1295. A PC-Based LowFER Frequency Synthesizer
  1296. General purpose 48-bit ISA parallel I/O card
  1297. Power from RS-232 port
  1298. PCI to ISA converter
  1299. WatchDog for ISA Bus
  1300. 4-channel 8-bit analog-to-digital converter for PC
  1301. Printer port ADC
  1302. Parallel port ADC based on MAX147
  1303. Analog Signal Acquisition for PC Printer Port
  1304. More accurate PC/AT clock
  1305. Getting power from RS-232 interface
  1306. Barcode scanner
  1307. Build your own iRDA SIR Transceiver (Dongle) using MCP2120
  1308. PC thermometer
  1309. Dive computer interface
  1310. Parallel port servo controller
  1311. GPS receiver (Gamin, Eagle etc) to PC interface cables
  1312. Connect two CD-ROM drives to one soundcard
  1313. Headphone driving circuit for soundcards
  1314. Get power out of PC parallel port
  1315. Null Printer Adapter
  1316. PC speaker volume control circuit
  1317. How to get power from PC to your circuits
  1318. RS-232 surge protection
  1319. Simple RS-232 serial port buffer circuit
  1320. Get power out of PC RS-232 port
  1321. Sound Blaster Microphone Preamplifier
  1322. Sega 3D glass interfacing circuits
  1323. Convert Atari-style joystick to PC joystick port
  1324. Fake Joystick circuit
  1325. Using the joystick port as general purpose input
  1326. Connect other circuits to PC joystick port
  1327. Schematic of a standard PC joystick
  1328. Simple PC SmartCard reader
  1329. Fax to modem interface
  1330. Analog to Digital Conversion (ADC) and Communicating with a PC
  1331. Temperature sensor for PC
  1332. Interfacing to an IBM PC/AT keyboard
  1333. PC interface for point controller
  1334. Linux Infra-red Remote Control (LIRC)
  1335. Homebuilt RS232 LCD Interface
  1336. Compter microphone
  1337. CCD linear image sensor to PC parallel interface
  1338. Laptop Computer Serial Port Power Booster
  1339. Assorted computer interface circuits
  1340. HamComm Interface
  1341. Apple II/II+/IIe IDE Drive Interface
  1342. Basic Stamp I & PC Relay Controller
  1343. RS-232 to TTL cable
  1344. Hi-Fi PC Speaker System
  1345. IDE hard-disk interface for Amiga 500
  1346. How to construct Garmin GPS receiver interface cables
  1347. iRDA printer adapter
  1348. 160 Baud ALDL Hardware Interface
  1349. AT PC Power Supply 1
  1350. AT PC Power Supply 2
  1351. AT PC Power Supply 3
  1352. AT PC Power Supply 4
  1353. AT PC Power Supply 5
  1354. iLINK Interface
  1355. Digital Signals Decoding Interfaces
  1356. 9-pin null modem cable
  1357. RS232 - Lowe HF-225 interface
  1358. RS232 to IrDA convertor using Vishay TOIM3232
  1359. Interfacing PC sound card to SSB rig
  1360. Supply Derives Power From 3-Wire RS-232 Port
  1361. 24-line PC digital interface (PDF)

    Voltar para o Topo
    PDA interfaces
  1362. Casio interface circuits
  1363. SHARP palm-top/hand-held to RS232 serial converter
  1364. Interfacing ultrasonic range finder to BrainStem
  1365. Hamamatsu UVTron Interface to a BrainStem
  1366. Casio interface cable
  1367. Casio organiser hardware
  1368. MIDI interface for Palm computers
  1369. MIDI interface for Palm cradle
  1370. MIDI interface for Visor USB
  1371. MIDI-USB Cradle for Visor (Deluxe, Platinum)
  1372. MIDI interface for Visor
  1373. Casio datalogger
  1374. Interfacing ADXL202 accelerometer to PalmPilot
  1375. PalmPilot audio interface
  1376. PalmPilot cradle to modem adapter
  1377. PalmPilot connector pinouts
  1378. PalmPilot serial port interface
  1379. PalmPilot memory schematics
  1380. Aladin interface
  1381. PalmPilot turbo boost guage interface
  1382. IBM PC keyboard to PalmPilot interface
  1383. Aladin interface using op-amp
  1384. Wireless local network for PalmPilot (large PDF)

    Voltar para o Topo>
    Fontes de alimentação  fixas e ajustáveis
  1385. Fonte 1.5 a 30 volts
  1386. Fonte 1.5 a 30 volts
  1387. Fonte 13.7 Volts pc based
  1388. Carregador com lm317T - Carregador para bateria de carro
  1389. Power supply provides +5VDC regulated, +10VDC unregulated and 7.5VAC
  1390. 13.5KV power supply
  1391. Kirlian device supply
  1392. LM317 adjustable power supply
  1393. LTC1265 Nicad charger
  1394. Single cell lithium battery charger
  1395. Smart battery charger
  1396. Battery charge indicator
  1397. Lead acid trickle charger
  1398. 12B Battery condition indicator
  1399. Alkaline battery charger
  1400. Alternative power source for Magellan GPS receivers
  1401. Power Tool Torque Control
  1402. Generating Negative 5 Volts from 9 Volt Battery
  1403. LED Battery Condition Indicator
  1404. LM317 Variable Voltage Regulator
  1405. LM317 Regulator With Pass Transistor
  1406. High Current Regulated Power Supply
  1407. Simple Variable Voltage Source
  1408. Various switching power supplies
  1409. Variable 3 - 24 Volt / 3 Amp Power Supply
  1410. 2 watt switching power supply
  1411. Variable Voltage and Current Power Supply
  1412. Low Power DC to DC Converter
  1413. Constant Current Battery Charger
  1414. Intelligent NiMH/NiCd switched mode fast charger
  1415. Variable DC power supply
  1416. Nicad battery charger
  1417. Simple power supply
  1418. Voltage converter
  1419. Bench power supply
  1420. Easy power supply
  1421. Valve power supply
  1422. 6V to 12V Converter
  1423. Tesla coil / HV generator
  1424. High Current Power Supply
  1425. Dual Polarity Power Supply
  1426. High Voltage High Current Power Supply
  1427. Transformerless Power Supply
  1428. Fixed Voltage Power Supply
  1429. Voltage Inverter
  1430. Voltage Inverter
  1431. Dual power supply
  1432. 1A Variable Regulated Power Supply
  1433. Negative voltage generator
  1434. 12V battery capacity tester
  1435. NE555 Low Voltage Battery Disconnect Circuit
  1436. 33 Volt DC To DC Converter
  1437. Automatic AC voltage (110/240) selector
  1438. Variable 0-5A Current Source
  1439. Ground Fault Interupter
  1440. Intelligent battery charger
  1441. 12 Volt DC Load Control and Battery Protection
  1442. Low battery indicator
  1443. Variable power supply
  1444. Switching Power Supply
  1445. Low Power DC Quadrupler
  1446. Surge protector
  1447. Ultimate power supply
  1448. Variable Regulated Power Supply
  1449. Power reminder beeper (PDF)
  1450. Unplugged power cord alarm
  1451. Machine power loss beepter (PDF)
  1452. Low-dropout 12V regulator (LM324)
  1453. HV supply: 12VDC in, 12KV out
  1454. Generating -5VDC from +5VDC
  1455. Filtering PC bus POWER
  1456. Bidirectionall power inverter
  1457. Nagative voltage generation using 555 timer
  1458. High current regulated power supply
  1459. One 9V battery gives +18, +25, +33V
  1460. +9V *and* -9V from one battery
  1461. Battery charger
  1462. Adjustable power supply using LM317
  1463. Simple +5V power supply circuit
  1464. 12 Vdc - 120 Vac Inverter Schematic
  1465. +12V/-12V Power supply unit
  1466. +/-12V -> +/-5V Power unit
  1467. +5V Switching regulator (1)
  1468. Switching regulator (2)
  1469. Electric power controller
  1470. +30V power supply with +5V
  1471. +30V DC-DC converter
  1472. DC/AC inverter (2)
  1473. DC/AC inverter (1)
  1474. PIC16F873 DC motor speed controller
  1475. 12V 30A power supply
  1476. Dual regulated power supply
  1477. Fuse blown indicator
  1478. Gyrator circuit
  1479. Variable power supply
  1480. LM317 Regulator Circuit
  1481. Nicad battery charger
  1482. Regulated 12V supply
  1483. Unregulated power supply
  1484. Snowmobile GPS power adapter
  1485. Simple switching power supply
  1486. Assorted power source and control circuits
  1487. 12 volt battery monitor
  1488. 12 volt power supply
  1489. 5 volt power supply
  1490. Battery voltage monitor
  1491. LM3914 battery monitor
  1492. Multiple voltage power supply
  1493. Voltage doubler
  1494. Voltage inverter
  1495. PWM Motor Speed Controller / DC Light Dimmer
  1496. PWM Motor/Light Controller
  1497. Low Power LED Voltmeter
  1498. PWM Motor/Light Controller
  1499. PWM Motor/Light Controller variants
  1500. Low Power LED Voltmeter
  1501. Temperature Controlled NICD Charger
  1502. Simple Capacitance Multiplier Power Supply For Class-A Amplifiers
  1503. Simple DC Adapter Power Supply
  1504. Variable Dual Lab Power Supply
  1505. Battery Charger Ideas
  1506. Power control for arc welders and other inductive loads
  1507. Charger for gel lead acid batteries
  1508. Nicad battery cycler
  1509. Battery Characterizer
  1510. Nicad Battery Discharger/Capacity Indicator
  1511. 200 Watt Modified PC Power Supply 13.5 Volt 14 Amp

  1512. Voltar para o Topo
    Radiofrequency circuits and antennas
  1513. Amplificador de sinais de tv uhf vhf (booster)
  1514. 45-70 MHz aerials for TV DX
  1515. A71 VHF antennas for CW/SSB
  1516. F6ITV, ALL HF BAND ANTENNA - 22m
  1517. Super Antena ARTESANAL para telefonía celular
  1518. 9 dB, 70cm, Collinear Antenna
  1519. 802.11b Homebrew WiFi Antenna
  1520. How To Build A Tin Can Waveguide WiFi Antenna
  1521. 80/40m Vertical
  1522. Antena de 7 MHz de alta ganancia
  1523. Antena para Cacerías de Zorro en 144 MHz
  1524. Antena de tamanho reduzido para 10/15/40/80 e 20m
  1525. A compact 2 element beam for 10M
  1526. Antennae for the Low Bands..80 and 160m
  1527. Antena para VHF
  1528. ANTENA YAGI A PARTIR DE UNA LATA DE PATATAS PRINGLES
  1529. DIRECIONAMENTO DE ANTENA PARABÓLICA UNIVERSAL
  1530. TV Signal Amplifier
  1531. 15dB UHF TV Antenna Booster
  1532. VCO 20MHz
  1533. UHF oscillator
  1534. Economoy short-wave radio
  1535. Linearized RF detector
  1536. Two-band radio
  1537. Shortwave conveter for scanners
  1538. FM Bug
  1539. AM Radio
  1540. Toroidal coil RF shortwave receiver
  1541. Crystal radio
  1542. CW RECEIVER 40/80 meter CW receiver
  1543. TRF AM Receiver circuit
  1544. WLW 500KW Transmitter Schematic
  1545. AM-Receiver for Aircraft communication (118.250MHz)
  1546. AM receiver for aircraft communications
  1547. 45-860MHz Radio receiver based on UV916-tuner
  1548. 80 Meter CW ARDF receiver
  1549. Four channel RF remote control
  1550. CW zero beat indicator (PDF)
  1551. Build your own VLF Receiver
  1552. Receiver building blocks
  1553. Simple wireless radio data link
  1554. RX3302 receiver module schematic
  1555. Superregenerative 27MHz receiver
  1556. 49MHz walkie-talkie
  1557. Convert 2m VHF FM PMR transceiver Motorola Radius M110 into an amateur radio
  1558. Vibrating pocket bug detector
  1559. 2MHz RF Oscillator
  1560. 50-150MHz Overtone Oscillator
  1561. Simple Op-Amp Radio
  1562. UHF - 100W Transistorized amplifier
  1563. 50MHz Converter
  1564. RF front-end for triple conversion GPS receiver
  1565. 2M - 20M transverter
  1566. Improved CMOS RF PLL sythesizer
  1567. Harmonic oscillator
  1568. Direction finder system
  1569. One transistor regenerative receiver
  1570. Synthesized HF receiver
  1571. TBA120 narrowband FM receiver
  1572. TDA7000 receiver
  1573. ZN414 receivers
  1574. 10W HF linear amplifier
  1575. 500W HF linear amplifier
  1576. 3W HF QRP linear amplifier
  1577. Phasing SSB exciter
  1578. 500mW HF linear amplifier
  1579. Generic VHF power amplifier
  1580. 10.7MHz FM detector
  1581. RTTY terminal unit
  1582. Q-multiplier
  1583. CMOS RF PLL sythesizer
  1584. 3W FM Transmitter
  1585. Crystal radio
  1586. Op-Amp Radio
  1587. Car radio tunes the Amateur Bands
  1588. Crystal set that requires no antenna
  1589. 80m Direct Conversion Receiver
  1590. A compact L-match ATU for portable use
  1591. Morse Adaptor for your VHF/UHF FM rig
  1592. An end-fed antenna, L-match coupler and resistive bridge for HF
  1593. AM Broadcast Band Regenerative Receiver
  1594. 50 MHz to 146 MHz Converter
  1595. Hear Amateurs on your Shortwave Radio!
  1596. Compact 20 14 MHz direct conversion receiver
  1597. Hear Amateurs on your FM Radio!
  1598. RF actuated CW monitor
  1599. LF to HF Converter
  1600. Super 80 ultra-simple SSB receiver for 3.5 MHz
  1601. Class B series modulator
  1602. L-Band PHEMT LNA for GPS, Inmarsat etc
  1603. Advanced VHF power meter
  1604. The MRX-40 Mini Receiver
  1605. 23cm Data Transceiver
  1606. External antenna for the GPS-38, Magellan 2000, or Eagle Explorer GPS receivers
  1607. AM Broadcast Band Active Antenna
  1608. Active antenna with gain
  1609. Ham Band VFO
  1610. HF Signal generator
  1611. Simple AM Radio Receiver & Amplifier
  1612. Bug detector
  1613. 175KHz inductive pulse receiver (PDF)
  1614. 200-400 MHz voltage controlled oscillator
  1615. AM/FM/SW active antenna
  1616. RF Sniffer <.5 to >500 MHz
  1617. Demodulator Schematic/Design
  1618. AM BCB radio receiver
  1619. Regenerative shortwave receiver
  1620. 7MHz SSB Transceiver
  1621. DSBSC (Double Side Band Supressed Carrier)
  1622. Frequency Synthesizer
  1623. Digital Automatic Gain Control (AGC)
  1624. Four Channel Wireless Transmitter and Receiver
  1625. Talking receiver
  1626. PLL synthesizing oscillator (1)
  1627. PLL synthesizing oscillator (2)
  1628. PLL synthesizing oscillator (3)
  1629. 2N2222 40 Meter CW/DSB Transceiver
  1630. Yaesu FT-736R doppler compensation
  1631. Phased lock loop schematic
  1632. 30M PSK31 Transceiver
  1633. SOP receiver (PDF)
  1634. SOP direct conversion receiver
  1635. Receiver
  1636. 30m direct conversion receiver
  1637. Popcorn direct conversion receiver
  1638. 40m direct conversion receiver
  1639. 80m direct conversion receiver
  1640. Huge LED Antenna Direction Display (part 1)
  1641. Huge LED Antenna Direction Display (part 2)
  1642. 136 kHz direct conversion receiver
  1643. One Watt 2.45 GHz Linear Amplifier
  1644. 222 MHz Transverter
  1645. VFO from 2001 ARRL Handbook, page 17.74
  1646. VFO from 2001 ARRL Handbook, page 14.20
  1647. Assorted RF circuits
  1648. 14MHz SSB 10mW Transceiver
  1649. Building a Simple LF Exciter
  1650. Yaesu band decoder schematic
  1651. 23cm Wide-Band FM data transceiver for high-speed packet-radio
  1652. VLF radio receiver schematic
  1653. 5 watt, 80 meter QRP CW Transceiver
  1654. How to Build a 300MHz AM, RF Remote Control System
  1655. RF Modem Robotics Project
  1656. PLL FM transmitter
  1657. ICOM CI-V interface with RS232 RTS to PTT
  1658. Improved FM Stereo Modulator
  1659. Smooth Tone Clickless CW Sidetone Generator
  1660. Variety of receiver converter projects
  1661. One transistor FM receiver
  1662. 42 Mc Band to 88 Mc Band (retrofit converter) Project
  1663. Crystal radio circuits including diode performance comparison
  1664. 50MHz Assistant (Preamp & Power Amp.)
  1665. Bug detector
  1666. Basic RF oscillator
  1667. Radio Control Electric Switch
  1668. 56K RF Modem
  1669. 80M ARDF direction finder

    Voltar para o Topo
    Solar energy circuits and ideas for alternative energy for save the planet
  1670. Sun tracking circuit for solar arrays
  1671. Solar power recharger
  1672. Solar power supply
  1673. Solar charge controller
  1674. Solar robots
  1675. Solar Tracker
  1676. 1381 solar engine
  1677. D1 solar engine
  1678. FLED solar engine
  1679. PM1 solar engine
  1680. Solar car array controller schematic
  1681. Solar car battery monitor schematic
  1682. Solar car brake controller schematic
  1683. Solar car main controller schematic
  1684. Solar car display controller schematic
  1685. Solar car electrical design and circuit index
  1686. Portable solar battery charger
  1687. Sensor Electronic Tracker with H-Bridge Drive
  1688. Sensor Electronic Tracker with Simple Solar Charge Controller
  1689. Solar tracking control system
  1690. LED7 solar tracker
  1691. Solar step-down regulator
  1692. Zener-based solar engine
  1693. AA battery solar charger
  1694. AA battery solar charger
  1695. Solar Panel Charge Controller / Low Voltage Disconnect Circuit
  1696. Solar Panel Current Meter
  1697. SCC2 10 Amp Solar Charge Controller
  1698. Solar Charged LED Flashlight
  1699. AA battery solar charger
  1700. Solar Panel Charge Controller / Low Voltage Disconnect Circuit
  1701. Solar Panel Current Meter
  1702. Solar cell Nicad charger
  1703. Solar powered dock lamp flasher
    Voltar para o Topo
    Telephony and intercoms circuits
  1704. Telephone recording circuit
  1705. Infinity Transmitter Schematic and Plans
  1706. Digisound ring modulator
  1707. Incoming call indicator
  1708. Telephone Ring Generator Using 60Hz Power Transformer
  1709. Telephone Ring Generator Using Switching Power Supply
  1710. Telephone In-Use LED Indicator
  1711. Telephone In-Use Relay Circuit
  1712. Telephone Audio Interface
  1713. Telephone interfacing / caller ID using a PIC microcontroller
  1714. Home made PBX / PABX
  1715. Ringing Phone Light Flasher
  1716. Phone Busy Indicator
  1717. FM Telephone Bug
  1718. Cut Phone Line Detector
  1719. Simple Phone Tap
  1720. Telephone Hold Button
  1721. Telephone Recorder
  1722. 300 baud modem circuit schematic
  1723. DTMF Generator/Decoder
  1724. Interface cables for various cell phones
  1725. Telephone music on hold box
  1726. Telephone ring controlled relay
  1727. 1-line telephone status indicator (PDF)
  1728. Line in use indicator (PDF)
  1729. 4-line telephone status indicator (PDF)
  1730. Caller ID decoder
  1731. Telephone in use light
  1732. Detecting a telephone RING
  1733. Phone In-Use Light
  1734. Phone to audio interface
  1735. Phone Off-Hook Indicator
  1736. 'phone rang' indicator light
  1737. Phone Line to Audio
  1738. Phone in-use
  1739. Telephone Line Monitor
  1740. Use old phones as an intercom
  1741. Phone-In-Use indicator
  1742. Hold function for Telephone
  1743. Digital/Standard Phone Line Tester
  1744. Caller ID decoder part 1
  1745. Caller ID decoder part 2
  1746. DTMF decoder / logger
  1747. FM telephone bug
  1748. Universal telephone hold
  1749. Talking phone dial monitor
  1750. Telephone line simulator
  1751. Telephone privacy adapter
  1752. Telephone ringing circuits
  1753. Simple circuit to connect telephone equipment to audio mixer
  1754. NCDS Interface Schematic for Nokia 3110, 8110, 8110i
  1755. Assorted telephone circuits
  1756. Greek telecard reader
  1757. Phone ring circuit schematic
  1758. Cut phone line detector
  1759. Telephone autodialler
  1760. Taxi phone automatic dialler

    Voltar para o Topo
    Instruments of bench test and measurement
  1761. Lc meter com pic 16f84
  1762. Indutímetro para multiteste
  1763. Digital Capacitance Meter
  1764. CAPACÍMETRO DIGITAL para frequencimetro
  1765. CapPic
  1766. A Surprisingly Accurate Digital LC Meter
  1767. LC meter Polish
  1768. Lc meter Russian
  1769. Lc metre france
  1770. Lc meter german
  1771. LC meter
  1772. Lc meter Turkish
  1773. Frequency Counter
  1774. Frequencimetro até 2GHz
  1775. Frequency counter with a PIC and minimum hardware
  1776. Frequêncimetro com PIC
  1777. frequency counter with the 16F628
  1778. PRESCALER para frequencímetro com Ds8629
  1779. The 2002 DFD Digital Frequency meter
  1780. Generador de funciones completo
  1781. Wattmeter ROE
  1782. AMP Hourmeter project
  1783. Testador de Flyback
  1784. Lâmpadas série
  1785. PIC frequency meter by OM3CPH
  1786. Progamador de Eprom Willen +   software
  1787. Desmagnetizador de TRC
  1788. Sonda para medición de Alto Voltaje
  1789. LC METER Inductance and Capacitance meter
  1790. Audible continuity tester
  1791. Wire tracer
  1792. Signal generator for signal tracer
  1793. Electronic level
  1794. Digital volt meter
  1795. Adjustable continuity tested
  1796. Frequency counter
  1797. Tri-Waveform Generator
  1798. 220V live wire-in-wall scanner
  1799. Owens Bridge Inductance Measurement Device
  1800. ESR Meter
  1801. Line Output / Flyback transformer tester
  1802. PC-Based Digital Storage Oscilloscope (DSOA)
  1803. PC Based Digital Storage Oscilloscope Mk3
  1804. Simple 6-Digit 40MHz Frequency Counter Module
  1805. Automatic stud detector
  1806. Capacitance meter
  1807. Capacitance meter
  1808. AC Line Current Detector
  1809. Triangle and Squarewave Generator
  1810. Signal tracer / injector
  1811. Voltage probe
  1812. Live line detector
  1813. Grid dip meter
  1814. PCB VSWR bridge
  1815. Electric field & leakage detector
  1816. Simple polarity detector
  1817. RCM710 Electronic Scale
  1818. 3 - 12 MHz Signal Generator
  1819. Some simple test equipment to build
  1820. RF Power Meter for the QRPer
  1821. Dip Oscillator for HF
  1822. Two Tone Audio Oscillator (use for SSB tests)
  1823. Simple pH meter
  1824. Temperature compensated pH meter
  1825. pH meter with calibration
  1826. Four Channel Oscilloscope Adapter
  1827. Arbitrary Waveform Generator
  1828. Digital Pressure Gauge
  1829. Remote Field Strength Meter
  1830. Digital frequency counter
  1831. Function generator
  1832. High / Low indicator
  1833. AC/DC LED Indicator
  1834. Micro ohm meter
  1835. Micro volt probe
  1836. MOSFET tester
  1837. Power factor meter
  1838. Ramp generator
  1839. LASER/LED light output intensity meter (PDF)
  1840. Frequency and capacitance meter
  1841. Resistor decade box
  1842. Simple light sensor adapter for oscilloscope
  1843. Time Domain Reflectometer (TDR)
  1844. 40MHz frequency counter using Atemel AVR 2312 microcontroller
  1845. pH Meter
  1846. Multi Wire Cable Tester
  1847. Connection tester
  1848. EMF field probe
  1849. Function generator
  1850. Logic probe
  1851. Zener diode tester
  1852. Mini DDS (direct digital synthesizer)
  1853. LCD frequency counter (PIC16F84)
  1854. Pulse Reading Logic Probe
  1855. Pink Noise Generator for Audio Testing
  1856. Audio Millivoltmeter
  1857. Audio Test Oscillator
  1858. Full Featured Transistor Tester
  1859. Opamp Design and Test Board
  1860. Microphone Circuit Test Oscillator
  1861. Distortion Analyser
  1862. Self Oscillating Amplifier for Distortion Testing
  1863. 120MHz frequency counter
  1864. Capacitance meter that connects to multimeter
  1865. Transistor tester and signal injector
  1866. Continuity tester
  1867. Square wave oscillator (555)
  1868. Build a Magnetic Field Immunity Tester
  1869. 555 Timer IC Tester
  1870. 555 go / no-go tester
  1871. 12V Lead-Acid Battery Monitor
  1872. Continuity tester 2
  1873. Continuity tester
  1874. Logic probe
  1875. 4-channel DSO for oscilloscope
  1876. Field strength meter for the 137 kHz band
  1877. In-circuit electrolytic tester
  1878. PIC logic probe with pulser

  1879. Voltar para o Topo Timers and oscillators
  1880. Budget timer
  1881. Long period timer
  1882. 555 time delay circuit
  1883. Low frequency clock
  1884. Countdown timer with relay
  1885. DDS using AD9835
  1886. 1 Second Time Base From Crystal Osc.
  1887. Power-On Time Delay Relay Circuit
  1888. Low Voltage , High Current Time Delay Circuit
  1889. Power-Off Time Delay Relay Circuit
  1890. Generating a Delayed Pulse With a dual 555 Timer
  1891. 1KHz Sinewave generator
  1892. Timed beeper
  1893. GPS receiver clock circuit
  1894. Time Delay Relay
  1895. Time Delay Relay
  1896. Wide-swing Variable Crystal Oscillator
  1897. Circuit that momentarily closes a pair of contacts at long intervals
  1898. Onboard Fogger Timer
  1899. Colpitts 1 to 20 MHz Crystal Oscillator
  1900. Divide By 1-1/2 Circuit
  1901. Simple sinewave generator
  1902. Two Transistor Sine Wave Oscillator
  1903. 10 Hz to 10 Khz VCO with Square and Triangle wave
  1904. Line powered 60Hz clock generator (PDF)
  1905. Micro-power pulse generator (PDF)
  1906. Darkroom camera shutter timer
  1907. Divide by 1.5 counter (PFD)
  1908. High-output square wave generator (PDF)
  1909. D Flip-flot one-shot circuits (PDF)
  1910. Clock divider
  1911. Clock doubler
  1912. CMOS oscillator
  1913. Crystal 32.768KHz CMOS Oscillator
  1914. Crystal oscillator
  1915. Cheap 40KHz clock
  1916. Stable 40KHz clock
  1917. 'Rounding Off' a square wave
  1918. Switch debounce using 555
  1919. Square wave to sine wave converter
  1920. Day / Night / 24 Hour Select Sensor
  1921. One transistor timer
  1922. Variable timer
  1923. Micropower pulse generator (PDF)
  1924. Square wave oscillator
  1925. Triangle wave oscillator
  1926. Sawtooth wave oscillator
  1927. Sine/Cosine wave oscillator
  1928. 555 timer
  1929. 555 oscillator
  1930. Stable multivibrator (IC)
  1931. Stable multivibrator (Transistor)
  1932. Timer based on Microchip PIC16F628
  1933. Push Button Switch Debouncer
  1934. Square wave oscillator
  1935. 5 to 30 Minute Timer
  1936. NE555 Basic Monostable
  1937. Mini DDS (Direct Digital Synthesis)
  1938. Astable Multivibrator
  1939. High Precision GPS/TV controlled Reference Oscillator
  1940. TV based Receiver for a Standard Frequency Generator
  1941. AD9852 DDS schematic
  1942. A GPS receiver based frequency standard
  1943. Monostable multivibrator
  1944. Clock generator
  1945. 555 Timer Tutorial + Circuits
  1946. Versatile electronic timer


  1947. Voltar para o Topo Transmitters FM, AM, TV

  1948. Transmissor potente de FM com 2n2218
  1949. Transmissor de tv1
  1950. Transmissor de TV com lm1889n
  1951. Micro Transmissor de fm para espionagem
  1952. FM Stereo Transmitter
  1953. gerador de FM para a faixa de 88 a 108 MHz
  1954. The stereo FM Micromitter
  1955. VHF video trasnmitter
  1956. Transmisor de televisión
  1957. Emissor Parcial de TVA
  1958. Li'l 7 AM Transmitter Schematic
  1959. Wireless microphone
  1960. XTAL locked tone transmitter
  1961. AM oscillator for wireless microphones
  1962. Wireless microphone
  1963. 1W CW Transmitter
  1964. 433MHz transmitter using SAW resonator
  1965. A 3m (100 MHz) small bug
  1966. Basic FM Transmitter
  1967. Micro Power AM Broadcast Transmitter
  1968. FM Beacon Transmitter (88-108 MHz)
  1969. 1 valve CW transmitter
  1970. 250mW HF CW transmitter
  1971. 2 valve CW transmitter
  1972. Transmitter using LM317
  1973. 5 Watt HF CW transmitter
  1974. Simple FM microphone
  1975. FM bug
  1976. High power FM bug
  1977. 27MHz AM/CW transmitter
  1978. Easy 2-meter transmitter
  1979. QRP HF transmitter
  1980. Spark gap transmitter
  1981. QRP SSB transmitter
  1982. Crystal controlled FM transmitter
  1983. 150mW FM transmitter
  1984. FM transmitter
  1985. Two Valve 40m CW Transmitter
  1986. Frequency agile 80m CW QRP transmitter
  1987. 80 metre DSB transmitter
  1988. One Valve CW transmitter
  1989. Simple Low FER Transmitter
  1990. 7Mhz AM/CW Amateur Radio Transmitter
  1991. VHF FM transmitter
  1992. Simple FM transmitter
  1993. Wireless microphone
  1994. Shortwave radio transmitter
  1995. 175KHz inductive pulse transmitter (PDF)
  1996. 7MHz QRP transmitter
  1997. Small Radio Transmitter
  1998. FM Telephone Transmitter
  1999. Tracking transmitter
  2000. 5W PLL Transmitter
  2001. Miniature FM transmitter
  2002. Sensitive FM transmitter
  2003. Simple RF transmitter
  2004. 1.5 volt tracking transmitter
  2005. Tracking transmitter
  2006. Micro Power FM Broadcasting Circuits
  2007. Low Power FM Transmitter
  2008. RF/SS Handie Hopper Transmitter Schematic
  2009. 30-Meter QRP Transmitter for Morse Code
  2010. Miniature FM Transmitter #1
  2011. Miniature FM Transmitter #2
  2012. Miniature FM Transmitter #3
  2013. Light sensing RF transmitter
  2014. Micro-Spy with FETs
  2015. Micro-Spy with USW
  2016. Micro-Spy with TTL

    Voltar para o Topo
    Video related circuits and transmiters
  2017. Transmissor de tv1
  2018. Transmissor de tv com lm1889n
  2019. Amplificador / Inversor de Vídeo
  2020. Video Clock Superimposer
  2021. Video clock superimposer using PIC16C711
  2022. Simple AV (audio / video) wireless transmitter
  2023. Audio / video distribution amplifier
  2024. 10GHz video link
  2025. Experimental macrovision remover
  2026. 8 x 8 Audio-video switch
  2027. VHF/UHF TV modulator
  2028. LH0032 video amplifier
  2029. LM359N video amplifier
  2030. Macrovision code remover
  2031. Driver for multiple VGA monitors
  2032. CCD (charge coupled device) support board
  2033. Closed-Caption Decoder
  2034. PIC-Tock video clock
  2035. Video/Audio Wireless Transmitter
  2036. Video signal amplifier
  2037. RGB video digitizer
  2038. Color Bar Generator
  2039. Microcontroller test pattern generator
  2040. NTSC Video Distribution Amplifier
  2041. Commodore RF modulator
  2042. Video signal edge enhancement
  2043. Video amplifier
  2044. Video/Audio Wireless Transmitter
  2045. 4 Stage 555 Timer for Video Cam Control
  2046. Digital volt meter with video output
  2047. TV/Radio antenna cable galvanic isolator
  2048. S-video to composite video adapter
  2049. VGA converter for video projectors and fixed frequency monitors
  2050. VGA to TV converter
  2051. VGA to PAL and NTSC converter
  2052. PIC micro frame grabber (TDA8708)
  2053. Low cost audio/video modulator and transmitter
  2054. Many video amplifier circuits includiing transmission over UTP (PDF)
  2055. Commodore 64 Video Modulator 251025 Schematics
  2056. Commodore 64 Video Modulator 251696 Schematics
  2057. TV RGB signal output from a SVGA graphics card
  2058. Macrovision removal
  2059. AVR (AT90S2313) composite PAL colour bar generator
  2060. Homebuilt video digitizer Mark I
  2061. Homebuilt video digitizer Mark II
  2062. TV transmitter>


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Atualização maio 2008 Adicionado + 50 links

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