 | Electronic door codelock (PIC16F84)
|
| Ultrasonic remote control & alarm system
|
| Digital entry lock
|
| Proximity switch
|
| Toxic Gas Detector
|
| Door knob alarm (PDF)
|
| Water seepage alarm (PDF)
|
| Micro-power over temperature alarm (PDF)
|
| Personal silent alarm system
|
| Active IR motion detector
|
| A Basic RF Transmitter for PIR Sensors
|
| PIR motion detector
|
| Simple alarm system
|
| Automatic door opener using PIC12C508
|
| Home security project
|
| 5 Zone alarm circuit
|
| Miniature loop alarm
|
| Novel Buzzer
|
| Gate alarm circuit
|
| Modular Burglar Alarm
|
| Motorcycle alarm
|
| Enhanced 5 Digit Alarm Keypad
|
| Enhanced 4 Digit Alarm Keypad
|
| RF Alarm
|
| Single Zone Alarm
|
| Water Activated Alarm
|
| Water level alarm
|
| Perimeter monitor
|
| Digital combination lock
|
| Alarm control keypad
|
| Almost Ultrasonic Motion Sensor
|
| Touch activated alarm system
|
| Combination Lock (PIC16F84)
|
| Low power RFID transponder
Visit our ebay
store ad for details
on this 100 mW FM stereo transmitter!
Audio power amplifier schematics
|
| Two transistor audio amplifier
|
| Personal stereo audio amp
|
| Headphone amplifier
|
| 1.5W Audio amplifier
|
| Low-level audio amp
|
| 10W amplifier
|
| 80W amplifier
|
| LM383 12V Amplifier
|
| 100W Amplifier
|
| 18W Audio amplifier
|
| 25W MOSFET amplifier
|
| Headphone amplifier
|
| Portable headphone amplifier
|
| 2W amplifier
|
| 4W amplifier
|
| 8 watt audio amp
|
| 20W Amplifier
|
| 50W Amplifier
|
| 100W Audio amplifier
|
| 100W RMS Amplifier
|
| 2-Channel Power Amplifier
|
| Push-Pull Class A Amp using type 5687 dual triodes
|
| Push-Pull Class A 2A3 Stereo Amp
|
| Single Ended Class A2 SV811-10 Stereo Amp
|
| Audio amplifier output relay delay
|
| Spatial Distortion Reduction Headphone Amp
|
| HeadBanger Headphone Amp
|
| 2W Amplifier
|
| TDA2030 8 Watt amplifier
|
| Headphone distribution amp
|
| Headphone monitor amp
|
| 50W audio power amplifier
|
| Bi-Directional 2.4 GHz One Watt Amplifier
|
| Bi-Directional 900Mhz One Watt Amplifier
|
| 20 Watt GaAaFET Power on 2.3 GHz
|
| 1 Watt 2.3 GHz RF Amplifier Using a MRF2001
|
| 2.3 GHz Power Amplifiers
|
| 2304 and 3456 MHz Power Amplifiers
|
| High quality exponential VCA
|
| 16 Watt amplifier
|
| 8 Watt amplifier
|
| Power amp schematic (PDF)
|
| 20 Watt Class-A Power Amplifier
|
| El-Cheapo - A Really Simple Power Amplifier
|
| Single Chip 50 Watt / 8 Ohm Power Amplifier
|
| Hi-Fi Headphone Amplifier
|
| 100W Guitar Amplifier
|
| Death of Zen (DoZ) - A New Class-A Power Amp
|
| Soft-Start Circuit For Power Amps
|
| Thermo-Fan To Keep Your Amp Cool
|
| Audio Amp Output Power Limiter
|
| 55W (Originally 75W) Power Amplifier
|
| 300W Subwoofer Power Amplifier
|
| 20 Watt / Channel Stereo Power Amplifier
|
| Mini bench amplifier (LM386)
|
| 12 Watt Valve Guitar Amp
Visit our ebay
store ad for details
on this 3 watt FM transmitter board!
Audio preamp circuits
|
| Microphone amplifier
|
| RIAA phono amplifier
|
| Low impedance microphone amplifier
|
| Dynamic microphone preamplifier
|
| Phono preamp
|
| Masthead preamp
|
| Preamplifier for microphone or guitar use
|
| Simple microphone preamplifier
|
| Tube microphone preamp
|
| Simple Stereo Electret Microphone Preamplifier
|
| Simple Stereo Electret Microphone Preamplifier
|
| Phono Preamp
|
| Simple microphone preamplifier
|
| ECM Mic preamp
|
| Hi Fi preamp
|
| Balanced microphone preamp
|
| Audio preamp
|
| Electret mic amplifier
|
| Audio preamplifier
|
| Vacuum Tube Microphone Preamp
|
| FET Preamp Cable
|
| Audio preamp
Automative, car and motorcycle schematics
|
| Electronic auto stethoscope
|
| Turn signal alarm
|
| Motorcycle turn-signal system
|
| Cigarette lighter 9V adaptor
|
| Analog Tachometer for Gasoline Engines
|
| Headlight On reminder with Light
|
| Adaptive Windscreen Wiper Control
|
| Car clock
|
| Car message display
|
| Car interval wiper
|
| Safety indicator light
|
| Speed limit alert
|
| Grand Cherokee Off-Highway Lights
|
| Engine control unit schematics
|
| Portable CD Player Adapter For Car
|
| Car battery charger
|
| Wireless Auto Tachometer
|
| Alternator Signal Detector
|
| Automotive alarm system
|
| Road ice alarm
|
| Automotive Anti-Lock Brake Control Driver
|
| Headlight reminder
|
| Breath Alcohol Tester controlling a car ignition system
|
| Simple car battery charger
|
| Parking sonar
|
| Fuel injector pulse width monitor
|
| BMW R Series Motorcycle Regulator Schematic
|
| 80188XL Engine Tachometer
|
| Integrate Fuel Pump Wire Security Cut Off with a Turbo Timer
|
| Simple Car Preamplifier and Artificial Earth
|
| FCD (Fuel Cut Defencer)
|
| Interface between GM's 5 Volt 8192 baud ALDL data stream and a PC serial port
|
| 5301 wideband fuel mixture display
|
| Wide Band Fuel Mixture Display
|
| 3rd brake light
|
| 12V to 9V car coverter
|
| Car Nicad charger
|
| Combination lock for car liftgate
|
| BMW motorcycle side stand protection mod
Data acquisition and data logging schematics
|
| Air flow detector
|
| Air flow detector
|
| Strain gauge sensor
|
| Digital Water Wave/Tide/Level Meter (PIC16F876)
|
| Self made data-logger V2.5 (second edition)
|
| Magnetometer
|
| Analog input section based on AD9220
|
| uModem 4+4/8 channel A/D board
|
| ADXL202 accelerometer to CV output
|
| Light direction sensor
|
| 12-Bit ADC interface
|
| Digital thermometer
|
| Universal flight controllers / datalogger
|
| Rain detector
|
| Home Brew Compass Sensor
|
| Using 555 Timer as an A/D converter
|
| ADC0804LCN 8-bit A/D converter
|
| Web-based thermometer project
|
| Low Flow-Rate Thermal Flowmeter
|
| Geiger counter
|
| Differential Capacitance Measurement for Tilt Meter
|
| Honey Bee counter (PDF)
|
| Capacitance type liquid level measurement (PDF)
|
| Thermostat node schematic
|
| Digital PC Oscilloscope
|
| Ultrasonic Range & Imager
|
| Precision Digital Altimeter
|
| Digital compass schematic
|
| Temperature datalogger
|
| Serial Port A/D-converter
|
| Centronics port D/A converters and low-pass filter
|
| LCD Thermometer
|
| Acceleration monitor using Analog Devices ADXL202
|
| Optical sensor using PIC12C508
|
| Wireless Liquid Level Sensing for Restaurant Applications
|
| Accelerometer Schematic
|
| Pressure Sensor-Based Altimeter Circuit
|
| Ultrasonic range finder circuit
|
| 1-wire barometer
|
| Water-level sensor
|
| Addressable ADC
|
| Electronic altimeter using PIC16F877
|
| Wireless weater station
Filter schematics
|
| Galaxy Noise Filter
|
| Low-pass active filter
|
| Filter Circuit for the Earthworm Seismic Data Acquisition System
|
| Active 2nd Order Filters
|
| RC Notch Filter (Twin T)
|
| Multiple Feedback Bandpass Filter
|
| CW filters
|
| Self-tune filter
|
| SSB AF filter
|
| Helical Resonator Notch Filter
|
| 3KHz low-pass filter plus audio amp (PDF)
|
| Active bandpass filters
|
| Bandpass filters
|
| Butterworth filters
|
| Narrow band audio bandpass filter
|
| Inversal notch and bandpass filter
|
| DC Accurate, Active RC Lowpass Filter
|
| Chebyshev Bandpass Filter
|
| Bandpass filters
|
| Chebyshev / Butterworth filters
|
| Biquad Active Bandpass Filter Schematic
|
| "A" Weighting Filter For Audio Measurements
|
| Multiple Feedback Bandpass Filter
|
| Digital signal processor (DSP) for radio communications
|
| 29.85 MHZ bandpass filter schematic
|
| 29.85 MHZ notch filter schematic
|
| LC filter design
Games and fun stuff (schematics)
|
| Visor cradle serial interface
|
| Electronic coin tosser
|
| Electronic craps game
|
| First response monitor
|
| VCR ping pong game
|
| Video ping pong game
|
| MBC5/CPLD for the GameBoy
|
| GameBoy Camera Parallel Port Interface
|
| Mobile robot (PDF)
|
| PSX controler to PC MIDI converter
|
| Dreamcast PC serial adapter
|
| GameBoy Cart Programmer
|
| Memory game
|
| 32 Kb x 8 emulator for the GameBoy
|
| Project: NES to Atari 2600 controller interface
|
| Battery Meter for Pinball Machines
|
| SRX1 (Stephane's Robotic eXperiment 1)
|
| Pine Racecar Victory Judge
|
| Interfacing Sony control stick to Empeg
|
| Electronic Nicad glow plug driver
|
| April Fools LEDs
|
| Pinewood Derby logic
|
| Quiz Master
|
| GameBoy Schematic
|
| GameBoy LCD schematic
|
| GameBoy Power & Cartridge schematic
|
| GameBoy ROM+RAM+MBC1 Cart Schematic
|
| GameBoy MBC1 circuit equivalent
|
| Super GameBoy schematic
|
| Quiz show indicator
|
| Dreamcast interface
|
| Bingo!!! (on your tv)
|
| Slot car TV cronograph
|
| Furby reverse-engineered circuit
|
| Sanyo 20EZ monitor Arcade Game (300k ZIP)
|
| Burger Time Arcade Game (500k ZIP)
|
| Dig Dug Arcade Game (800k ZIP)
|
| Frogger Arcade Game (500k ZIP)
|
| Galaga Arcade Game (542k ZIP)
|
| Gyrus Arcade Game (800k ZIP)
|
| Junior Pacman Arcade Game (400k)
|
| Ladybug Arcade Game (335k ZIP)
|
| Mappy Arcade Game (470k ZIP)
|
| Moon Cresta Arcade Game (300k ZIP)
|
| Mr.Do Arcade Game (554k ZIP)
|
| PacLand Arcade Game (316k ZIP)
|
| Pengo Arcade Game (313k ZIP)
|
| Q*Bert Arcade Game (600k ZIP)
|
| Qix Arcade Game (476k ZIP)
|
| Scramble Arcade Game (600k ZIP)
|
| Time Pilot'84 Arcade Game (870k ZIP)
|
| Xevious Arcade Game (450k ZIP)
|
| Magic Wand Conjuring Trick
|
| Quiz game circuit
|
| E.S.P. Conjuring Trick
|
| Video game system using PIC18F252 (direct video generation)
|
| Video game system using SX28 (direct video generation)
|
| DIT shutterglasses controller
|
| Tic-tac-toe game using PIC16F628
|
| Archery timer
|
| PIC micro Tetris game
|
| Magic lamp, IR remote control jammer and other fun circuits (PDF)
|
| Lego Mindstorms Double Rotation Sensor
Infrared based schematics
|
| IR detector
|
| Infrared body heat detector
|
| Stereo IR audio receiver
|
| General purpose IR receiver
|
| Wireless IR headphone transmitter
|
| Wireless IR headphone receiver
|
| Infrared remote control shutter release system
|
| Infrared transmitter for locomotives
|
| Infrared gate for door
|
| Infrared circuits for remote control
|
| Serial port controller infrared transmitter (PIC16F628)
|
| IR Receiver (Amplitude Modulated IR)
|
| IR Transmitter for Audio (Amplitude Modulated IR)
|
| Digibox interface
|
| IR remote control
|
| Long Range Infrared Remote
|
| iRDA to TTL interface
|
| 40KHz light receiver (PDF)
|
| 40KHz TV-VCR repeater (PDF)
|
| Micro based PIR to IR remote converter
|
| IR-related ASCII Schematics V1.00
|
| Infrared remote transponder
|
| Build an Infrared night scope
|
| Decoding IR Remote Controls
|
| IR detector
|
| PC IR Remote Control Hardware
|
| PC IR Remote Control
|
| An Ambient-Light-Ignoring Infrared Active Motion Detector
|
| Infrared Transmitter and Receiver schematic diagrams
|
| Pyroelectric Infrared Sensor
|
| Minimal Infrared transmitter for PC
|
| Simple IR transmitter circuit
|
| Simple infra-red detector
|
| AVR (AT90S2313) serial port infrared receiver
|
| Infra Red Switch
|
| IR remote control extender
|
| IR Remote Control Extender Circuit (Mark 2)
|
| IR Remote Control Extender Circuit (Mark 3)
|
| IR Link
|
| IR remote control tester
|
| 40khz IR Tester
|
| 555 timer 40khz IR Oscillator
|
| IR detector / emitter
|
| Fire-Stick infrared remote control
|
| Simple infrared remote control
|
| Infrared / Ultrasonic beacon
|
| Implementing Infrared Object Detection
|
| IR detector for robotics
|
| Computerized Infrared Remote
Laser related power supplies and data transmission
|
| Light beam receiver for laser pistols
|
| 12V supply for He-Ne laser
|
| Laser diode transmitter
|
| Laser power supply
|
| Laser transmitter/receiver
|
| Laser harp
|
| Laser Telephone Receiver Circuit
|
| Fiber Optic Voice Communications
|
| Efficient Laser Supply
|
| 20MHz VCSEL 3mW laser test circuit (PDF)
|
| 10MHz to 20MHz laser light detector (PDF)
|
| Micro-power 40KHz burst laser diode driver (PDF)
|
| 40KHz laser burst detector (PDF)
|
| Modulated laser diode tester (PDF)
|
| Ar/Kr Ion Laser Power Supply
|
| Laser diode power supply circuits
|
| RS-232 Laser Transceiver
|
| HeNe laser power supply
|
| OPT201 Laser receiver
|
| OPT301 Laser receiver
|
| Laser transmitter schematics
|
| Diode Laser Power Supplies
|
| Laser bug circuit
|
| RS-232 Laser Transceiver
|
| Experimental laser data link
|
| Ar/Kr Ion Laser Power Supply Design
|
| Simple laser communicator
LED related schematics
|
| Big 7-segment LED display board with SPI interface
|
| LED Flasher
|
| LED pulser with audible output
|
| IR Illuminator
|
| Flashing Christmas LED display
|
| ICL7660 LED flasher
|
| LM3909 replacement using discrete components
|
| Color fade
|
| LEDs shimmer randomly as though on fire
|
| LED power supplies for AA cells
|
| 1.5 Volt LED Flashers
|
| AC Line Powered LEDs
|
| Astable Multivibrator
|
| 9 Second Digital Readout Timer
|
| 9 Second LED Relay Timer
|
| 16 Stage Bi-Directional LED Sequencer, other sequencer and flaser circuits
|
| 10 Stage LED Sequencer
|
| 28 LED Clock Timer
|
| Fading Red Eyes
|
| Two Transistor LED Flasher
|
| 16 Stage Bi-Directional LED Sequencer
|
| Expandable 16 Stage LED Sequencer
|
| LED Photo Sensor Circuit
|
| LED chaser
|
| 7 Segment LED Counter
|
| 7 by 10 LED Moving Sign ( 27C512 EPROM)
|
| Sequencial LED Flasher with Reversable Direction
|
| Tri Color LED Controller with Serial Interface
|
| 1.5V LED flasher B (PDF)
|
| Low current LED flasher (PDF)
|
| 1.5V LED flasher A (PDF)
|
| Flashing LED advertising badge (PDF)
|
| Flashing LED advertising badge (PDF)
|
| Pulsed LED test circuit (PDF)
|
| Low battery voltage flasher (PDF)
|
| Adjustable flashing LED
|
| PWM white LED drivers
|
| Heart of LEDs
|
| Christmas Star
|
| Christmas tree
|
| LED Counter
|
| PIC16F84 LED chaser
|
| PIC16F84 LED signboard
|
| PIC16F84 LED signboard 2
|
| White LED circuits
|
| Assorted LED circuits
|
| LED Mood Light
|
| LED Audio VU Meter
|
| Robot Beacon rotating light using PIC12C508
|
| LM3909 LED flasher
|
| Animated LED signboard (PIC16C84)
|
| Picxie 2 - 8x8 Animated LED Signboard
Lighting schematics
|
| Garden light switch
|
| DMX lighting and special effects
|
| Microcontroller Multichannel Light Dimmer
|
| Digital timer light switch
|
| Hand clap lamp control
|
| Radio controlled light switch
|
| Disco style Strobe Light
|
| Varying Brightness AC Lamp
|
| 12 Volt Lamp Dimmer
|
| 120VAC Lamp Chaser Using Solid State Relays
|
| Flashing Neons (NE-51 / NE-2)
|
| Sequencing Neons (NE-51 / NE-2)
|
| Touch Activated Lamp
|
| 220V Flashing lights
|
| Coutesy lamp
|
| Bedside lamp timer
|
| TRIAC light dimmer
|
| 12VDC Fluorescent Lamp Driver
|
| Strobe light
|
| Adjustable Strobe Light
|
| RHINO8 EL Sequencer
|
| Light Sequenced Candelabra
|
| Light timer
|
| 5W Fluorescent light intensity modulator (PDF)
|
| 1W Fluorescent lamp night light (PDF)
|
| Low-voltage light dimmer
|
| Light chaser
|
| 4-channel dimmer rack
|
| PIC16F873 light controller
|
| Disco light controller
|
| Neon desklamp
|
| Electronic night light
|
| Neon lamp dimmer
|
| LED Mood Light
|
| LX-800 Lighting system
|
| Xenon Strobe Light
|
| Lamp flasher/dimmer
Medical and health related schematics
|
| Snore alarm electronic device
|
| Heartbeat transducer
|
| ECG Amplifier
|
| EKG/EEG circuit
|
| Radiation Dosage-Rate Meter
|
| Heartbeat monitor
|
| Cranial Electrotherapy Stimulator
|
| Automated crib lights
|
| Jogging timer
|
| Tan timer
|
| Muscular Bio-stimulator
|
| Pedometer
|
| Simple lie detector
|
| EEG preamp, anti alias filter and isolation circuit
|
| Self Contained Electromyograph (EMG)
|
| Cardiac monitor
|
| Galvanic Skin Response (GSR) Schematic
|
| Brain-Wave Machine
|
| Lie detector
|
| Simple lie detector
|
| ECG project page
|
| The ESP SIM (Sound Impairment Monitor)
|
| Respiration system
Microcontroller based schematics
|
| PIC based packet radio encoder (PDF)
|
| RS485-Version of the SAB80C535-Microcontrollerboard
|
| PC IR receiver based on PIC16F84
|
| Record and play fast 1-bit sound on a PIC micro
|
| AT89C2051/4051scanning 7-segment display and keypad
|
| AT89C2051/4051 Driving dot LED
|
| AT89C2051/4051stepper motor interface
|
| AT89C2051/4051connecting dumb terminal
|
| Motorola 68K SBC (single board computer)
|
| 8051 SBC (single board computer)
|
| Simple RS232C Level Converter using Transistors
|
| Motorola 68HC11 evaluation board
|
| C-52 EVB Robot Controller
|
| Mains clock controller using AT89C2051
|
| AT89C2051/4051 Easy-Downloader
|
| AT89C51/52/55 Easy-Downloader
|
| PIC16F84 programmer
|
| PIC16F84 miniature real-time controller
|
| Isolated RS232 for PIC16F84
|
| PIC16F84 debugging terminal
|
| MiniLOGGER V1.0
|
| Analog datalogger based on T89C51RD2
|
| Atmel 89C Series Flash Microcontroller Programmer
|
| Atmel 89C2051 prototype board
|
| AT89C2051 real-time controller
|
| PIC12C508 Night-light saver
|
| AT89C2051 Night light saver
|
| Atmel 8051 Flash Based-Microcontroller Programmer
|
| AT89C2051 Digital thermometer and clock
|
| 4-Channel Timer using Atmel 89C4051 and MAX7219 display driver
|
| PIC16F84 CW decoder (PDF)
|
| 12C508 Smart Lock
|
| 80C31 stepper motor controller
|
| Build a PIC controlled DDS VFO, 0 to 6 MHz
|
| PIC controlled DDS VFO, 0 to 6 MHz
|
| Basic Stamp Lightning Activity Monitor
|
| Parallel AVR programmer
|
| PIC16F84 line following robot
|
| PIC16C505 IR / wireless remote control
|
| Automatic door opener with PIC12C508
|
| RS485-like multi-drop bus with half duplex serial protocol
|
| WWWpic2 - A web server in a PIC
|
| PIC16F84 web server
|
| 50 MHz frequency counter, voltage meter & SWR/PWR indicator
|
| Microcontroller board using the Atmel AVR AT90S8535
|
| Programmer PIC16F84,12C50x and EEPROM 24Cxx
|
| RDS Encoder - digital part
|
| PIC programmer for serial port
|
| Fully functional PS/2 mouse based on the PIC16F84
|
| PIC 18 programmer (PIC18F458, PIC18F452, PIC18C252, PIC16C745, PIC18F6620, PIC18F6720)
|
| Foreign vocabulary recollector
|
| Illuminate holiday destinations on a world map
|
| Embedded system to send e-mails (small TCP/IP stack)
|
| Speaking clock using PIC & ISD device
|
| Speaking doorbell using PIC & ISD device
|
| Whistle detector using 8-pin PIC
|
| PIXpand
|
| PIC16F877 to IDE interface
|
| 68HC11 stepper motor control
|
| 90S2313 AVR Robot Board
|
| POCSAG encoder/decoder
|
| Network Time Protocol AVR Clock
|
| DS1820 Temperature Sensor Readout Unit
|
| Rotating Sprocket Wheel Generator (PIC16F84)
|
| Talking PIC - based on SP0256
|
| Serial to parallel converter using the AT89C2051
|
| AT89C2051 serial COMs to LED driver
|
| PIC16F877 Programmer And Development System
|
| DS1820 Arbiter V2.00 Schematic
|
| Microchip PIC ICSP implementation
|
| 101 AT Keyboard to ASCII Decoder using 68HC705J1A MCU
|
| LCD Serial Terminal
|
| Propellor clock (PIC16F84)
|
| Optical sensor using PIC12C508
|
| Interfacing S-7800A to PIC16F877
|
| A Scenix (and PIC) Programmer
|
| MMC to PIC16F876 circuit diagram
|
| 8088 maximum mode SBC
|
| EZ80 single board computer schematic (Z80)
|
| 8051 Development System Circuit Board
|
| Voice recording and message retrieval system
|
| Interfacing a GPS to an LCD using a Microcontroller
|
| Long-period watchdog timer
|
| PIC16F84 Range Finder Project
|
| Generate video signals in real-time using a PIC16F84
|
| PIC ICD
|
| PIC Project #1 - RS232 to I2C Interface
|
| Galvanic decoupling of I2C bus
|
| Programmer PIC16F84,12C50x and EEPROM 24Cxx
|
| Dual PIC16C84 prototype board
|
| Graphic LCD interface
|
| FSK modem with PIC16C84
|
| Talking YODA project (PIC16C84)
|
| PIC16F84/PIC16F87x-In-System-Programmer
|
| Microcontroller interface for 5KW microwave oven
|
| Using an I2C Serial EEPROM with a Basic Stamp 2
|
| PIC16F84 Based Morse Code Reader
|
| AVR-Based Serial Port IR Receiver
|
| Interfacing piezo elements to a microcontroller
|
| Victoria TAFE programmer (based on AT89C2051)
|
| JDM programmer
|
| PIC micro programmer
|
| Speech recognition using HM2007
|
| PIC microcontroller servo motor interface
|
| PIC micro multiple servo motor interface
|
| PIC16F84 countdown timer
|
| PIC16F873 ultrasonic range meter
|
| PIC16F873 Digital clock
|
| PIC16F873 remote display
|
| PIC16F84 stepper motor controller
|
| Way small web server
|
| PICADC - a free, PIC based "intelligent" A/D converter
|
| 8051 development system circuit board
|
| 8088 maximum mode single board computer (SBC)
|
| Basic 89C2051 / 89C4051 circuit diagram
|
| Debugging dump terminal for 89C2051 designs
|
| Easy debugging terminal
|
| Galvanic decoupling of I2C bus
|
| Circuits interfacing piezo elements to a microcontroller
|
| Driving a TRIAC using a PIC12C508
|
| Isolated RS232C for PIC16F84
|
| Microchip ICD (in-circuit debugger) circuit diagram
|
| Microchip PIC ICSP implementation circuit diagram
|
| Interfacing NMEA GPS to LCD using PIC16F84
|
| PIC ICD (in-circuit debugger)
|
| PIC16C71 morse code callsign generator
|
| PIC16F84 to LCD interface
|
| PIC16F84 I/O expander with PicBasic
|
| Scanning 7-Segment & Keypad
|
| 10-key serial keypad encoder
|
| Simple RS232C Level Converter using Transistors
|
| Talking PIC microcontroller using SP0256
|
| PIC-Programmer 2
|
| Connecting PIC12C508 8 to 93AA46 serial eprom
|
| KD7LMO Micro Beacon (PIC18F252)
|
| GPS LCD Display Project
|
| PIC16F84 LED chaser
|
| PIC micro LED projects
|
| PS/2 keyboard keystroke logger based on Atmel 89C2051
|
| Electronic distance meter based on Motorola 68HC908QY4
|
| Fan timer based on Motorola 68HC908QT2
|
| Atmel AVR and 8051 series ISP programmer
|
| AT89C2051 line-follower robot
|
| Night light saver (PIC12C508)
|
| USB and GLCD expansion board for 8051 SBC
|
| Basic stamp interface circuits
|
| Microcontroller sensor and actuator interfaces
|
| Giant money counter (PIC16F876)
|
| PIC12C509 logic gate replacement for nitrogen filler
|
| PIC demo board
|
| PIC12C509 Gym Timer
|
| PIC LCD and Keypad driver
|
| PIC12C508 Phase Controller for 2kW heater
|
| PIC16F84 TRIAC / IGBT brightness phase controller
|
| PIC16F84 pulse monitor with date/time output (ZIP)
|
| Programmer for the 68HC705C8 MicroController
|
| 27c801 EPROM Programmer Project
|
| LCD to PIC16C54 schematic
|
| 68HC11 based RDS decoder
|
| Acceleration monitor using ADXL202 and AVR
|
| 40+ MHz 5-digit frequency counter with an AVR 2313
|
| Interfacing DRAM to AT90S8515
|
| Temperature monitor/controller: AVR 2313 / DS1621
|
| PIC micro to ISA bus interface
|
| PIC16C84 VT-52 Emulator for Linux
|
| Microchip PIC ICD (in-circuit debugger)
|
| Tony Nixons Pocket Programmer (PIC)
|
| PicoWeb V5.1 (AT90S8515) tiny web server
|
| Atmel 89C2051 In-Circuit Programmer Schematic
|
| 8051 Development System Circuit Board
|
| 8051 Development System Circuit Board
|
| Microprocessor using Xilinx FPGA
|
| Temperature controlled based on AT89CX051
|
| I2C LCD interface
|
| AFSK 1200 Modem based on PIC16C620
|
| PicCon - Hidden Radio Transmitter Controller
|
| PIC16F84 tone generator with source code
|
| PIC16F84 tone generator
|
| PIC16F84 tone generator (6-Bit)
|
| AVR Beacon Super Keyer
|
| AVR Frequency Counter
|
| AVR Digital Voltmeter
|
| AVR Signal Generator
|
| Ser-Key 10-Key Serial Keypad Encoder
|
| 2-wire LCD interface using PIC16CF84
|
| PIC16F84 Serial I/O-expander with PicBasic
|
| RS 485-RPT Schematic
|
| Camera remote control system using Basic Stamp
|
| Low cost Atmel in-system programmer
|
| Ultra low-cost programmer for AT90S family
|
| AVR to USB interface
|
| Programable LCD counter with memory backup based on Atmel AT90S1200A
|
| Connecting AT90S2313 with LCD display 2x16 char and 4x4 keypad
|
| Atmel AVR RCEN fuse bit programmer
|
| Electronic safety lock based on ATtiny26
|
| GSM SMS remote control using AVR microcontroller
|
| 128x64 LCD Driver for AT90S2313 (ZIP file)
|
| Connecting LED to PIC Micro I/O pins (PDF)
|
| Microprocessor RS-232 Reset
|
| AT90S8515 experimenter board
|
| Multi-chip programmer for PIC microcontrollers
|
| Buffered PIC chip interface
|
| A PIC-Based Keyboard Emulator
|
| PIC-based robot
|
| ScanMate audio activated recorded
|
| PIC vacuum fluorescent display interface
|
| PIC18F252 bootloader schematics
|
| PIC16F876 Datalogger
|
| GPS Repeater
|
| Kodak DC-20 camera interface (PIC12C509)
|
| Kodak DC-20 camera interface (PIC16F84)
|
| PIC ICD in-circuit debugger circuit diagram
|
| PIC programmers for parallel port
|
| Wisp628 ISP Microchip PIC Programmer
|
| WLoader - PIC16F877 application loader / bootloader
|
| Nixie clock (PIC16F876)
|
| Zilog Z80 thermostat embedded web server
|
| Picxie 2 - 8x8 Animated LED Signboard (PIC16F84) Picxie 2 - 8x8 Animated LED Signboard
|
| 10 tricks for interfacing to the PIC16C508
|
| Interfacing the PIC16C508
|
| PIC 5x7 display
|
| Analog to digital conversion notes
|
| Multi-chip programmer
Various audio schematics (also see Music, Amplifiers, Preamp)
|
| Electronic siren
|
| Two-tone siren
|
| Underwater microphone
|
| Code practice oscillator
|
| Noise generator
|
| Electronic whistle
|
| Twin-T Audio Sine Wave Oscillator
|
| 1.5V Audio Amplifier
|
| Low Power Op-Amp - Audio Amp (Intercom)
|
| 555 Tone Generator (8 Ohm Speaker)
|
| 3 Transistor Audio Amp (50 milliwatt)
|
| Low Frequency Sinewave Generator
|
| Automatic Charger for Battery Operated Hi-Fi Preamps
|
| Audio level indicator
|
| Room noise detector
|
| Amplifier timer
|
| Bell ring generator
|
| Amplified ear
|
| Precision audio millivoltmeter
|
| Six-channel Mixer and Amplifier
|
| Audio Signal Source
|
| Analog VU meter
|
| Voltage controlled amplifier
|
| Audio graphic equaliser
|
| Intercom preamp
|
| FET audio mixer
|
| Microphone mixer
|
| Tone control
|
| Digital volume control
|
| Sound level meter
|
| CMOS IC audio oscillator
|
| Three band Active Tone Control
|
| Automatic gain control (AGC) circuits
|
| Audio frequency meter
|
| Bull Horn
|
| Sound Mixer/Amplifier
|
| Very loud beeper (PDF)
|
| Digital noise generator (PDF)
|
| Tone display system
|
| Tube amplifier
|
| Condenser microphone hookup
|
| Phase shifter
|
| Paradoxical Sound Syntheizer
|
| Various tube crossover circuits
|
| Bias circuits
|
| Audio line isolator
|
| Dynamic microphone to electret microphone input
|
| Line level signal to microphone input adapter
|
| Simple two line output combiner
|
| Electret microphone powering circuits
|
| Use amplifier phono input as line level input
|
| Speaker signals to line level inputs
|
| Spring reverb unit
|
| Sine wave generator
|
| Simple amplifier
|
| 3-Band equalizer
|
| 6-Input mixer
|
| Doorphone intercom
|
| Stereo line driver
|
| Audio notch filer
|
| Peak reading audio level meter
|
| Tone control
|
| Speaker Microphone Circuit
|
| Electronic canary
|
| Electronic siren
|
| Microphone phantom power supply
|
| Voltage Controlled Mixer w/Modulator
|
| Dual Voltage Controlled Oscillator w/Modulator
|
| Dual Voltage Controlled Filter w/Modulator
|
| Stereo Ducker
|
| MS Stereo Decoder
|
| MS Stereo Microphone
|
| RIAA Equalized Stereo Phono Preamp
|
| Tube active crossover
|
| Improved PL tone decoder
|
| Magnetic cartridge amplifier
|
| LM358 preamp
|
| Sound detector
|
| Tone detector
|
| Tone generator
|
| Warbler
|
| Voltage Controlled Panner
|
| Low Noise Microphone Preamplifier
|
| Bridging Adapter For Power Amplifiers
|
| Simple Surround Sound Decoder
|
| Simplest Ever Amplifier Bridging
|
| Stereo Width Controllers
|
| Power Amplifier Clipping Indicator
|
| Phono Preamps For All
|
| Digital Delay Unit For Surround Sound
|
| Parametric And Sub-Woofer Equaliser
|
| High Quality Sound Mixer
|
| Loudspeaker Protection and Muting
|
| Direct Injection Box for Recording & PA Systems
|
| Minimalist Discrete Hi-Fi Preamp
|
| Signal Detecting Auto Power-On Unit
|
| Load Sensing Automatic Switch
|
| Amplifier thermal protection
|
| Active Sub-Woofer and Controller
|
| Balanced Line Driver & Receiver
|
| VU And PPM Audio Metering
|
| Variable Amplifier Impedance
|
| Linkwitz Cosine Burst Generator
|
| Low Noise Balanced Microphone Preamp
|
| Fast Audio Peak Limiter
|
| Subwoofer Equaliser
|
| Surround Sound Decoder Mk2
|
| Audio mixer
Miscellaneous schematics
|
| Ultrasonic radar
|
| Mobile APRS / GPS tracking system
|
| Electronic fish lure
|
| Ultrasonic sound receiver
|
| Experimental data transmitter for fiber optics
|
| Experimental fiber optic receiver
|
| Ion detector
|
| Darkness monitor
|
| Electroscope
|
| Simple event counter
|
| Geiger counter
|
| Light detector
|
| Short-circuit beeper
|
| LM 1800 FM stereo decoder
|
| Glitch detector
|
| MAX924 bar-graph level gauge
|
| Ultrasonic generator
|
| Negative ion generator
|
| ELF Monitor
|
| Chaos generator
|
| Simple BFO metal detector
|
| Voltage Comparator Information And Circuits
|
| Build Your Own Digital Setting Circles For Your Astronomical Telescope
|
| PL tone generator (NE567)
|
| Bat detector
|
| Bat detector microphone pre-amplifiers
|
| Full-duplex doorphone with 3 wires connection
|
| G Strain energy absorber
|
| RDS Encoder
|
| Toggle Switch Debounced Pushbutton
|
| Discrete Set/Reset Flip Flop
|
| Monostable Flip Flops (one shot)
|
| Discrete Bistable Flip Flop
|
| Talking Morse Code Practice Computer
|
| Plant watering watcher
|
| Capacitance sensor
|
| Whistle responder
|
| Nocturnal animals whisker
|
| 12V DC electronic door chime
|
| Biasing Op-Amps into Class A
|
| Parasite zapper
|
| Bleeper box for time reference
|
| Analog computer
|
| BayComm packet modem
|
| Morse monitor
|
| HamComm modem interface
|
| Morse paddle keyer
|
| UV light box
|
| Hardware Random Bit Generator
|
| Random noise generator
|
| Analog pulse counter
|
| Analog opto-isolator
|
| Pulse width modulators (PWM)
|
| Pulse width to voltage converter
|
| Fantastic Atom Expander
|
| Black Light
|
| Computerize Your Room/Home
|
| Flash slave trigger
|
| Suddent ionospheric disturbance (SID) receiver
|
| A Visual CW Zero Beating Aid
|
| A two-way Morse practice set
|
| Magnetic levitation device
|
| Tesla power receiver
|
| Lazer Tag Equipment Modifications
|
| Garmin GPS data interconnect
|
| Inexpensive APRS Weather Station
|
| Walking robot
|
| Basic op-amp circuits
|
| Power line FM intercom
|
| Intercom circuit
|
| Lightning Storm Detector
|
| Large LCD Display Buffering Driver
|
| Text to speech converter
|
| Ion detector
|
| 1uS light pulse descriminator plus F to V converter (PDF)
|
| Broadband 2MHz optical fiber receiver (PDF)
|
| Modulated light received (PDF)
|
| 1uS light pulse receiver plus post amp (MISC)
|
| Broadband 5MHz optical fiber receiver (PDF)
|
| High-speed light receiver (PDF)
|
| Basement doorbell beeper (PDF)
|
| Time to dust indicator (PDF)
|
| Low-power optical interrupter (PDF)
|
| Simple nitrogen spark generator (PDF)
|
| Ultrasonic transducer oscillator circuit
|
| Build logic gates using discrete parts
|
| Jacob's Ladder
|
| Sudden Ionospheric Disturbance (SID) Receiver
|
| A selection of robotics projects
|
| Bat detector (new)
|
| Vat detector (old)
|
| Variety of quick designs
|
| Gold wafer (smartcard) programmer
|
| Making a FRED photopopper
|
| GPS receiver support kit
|
| Griffith Observatory Tesla Coil
|
| Fogger smoke machine
|
| Dinsmore 1490 digital compass
|
| Geiger counter
|
| Electric field disturbance monitor
|
| Inexpensive seismometer project
|
| Digital dial
|
| Speech recognition using HM2007
|
| GPS receiver interface
|
| Doorbell for the Deaf
|
| Electromagnetic field detector
|
| Insect Repellant
|
| High Quality Intercom
|
| Magnetic Gun.
|
| Metal detector
|
| Static Electricity / Negative Ion Detector
|
| Ultrasonic dog whistle
|
| Popular Electronics Ultrasound Detector
|
| An Inexpensive X-ray Machine
|
| Navigator 555A radio direction finder (RDF) circuit diagram
|
| Magnetic levitation circuit
|
| PE3342 Programmer Schematic
|
| u-Blox GPS receiver board
|
| Assorted digital circuits
|
| Basic electronic circuits
|
| Miscellaneous simple circuits
|
| Digital Call Sign Annunciator
|
| Monitor output from Motorola Oncore GPS engine in HP Z3801A in GPS Disciplined Oscillator
|
| Ultrasonic switch
|
| Sound finding cricket with phase detector
|
| Sound finding cricket
|
| APRS GPS tracker schematic (PIC16C73)
|
| Common Ground for Older VPW Circuit
|
| Very basic circuits
|
| Bat detector
|
| FCTS Project
|
| Smooth Tone Clickless CW Sidetone Generator
|
| Morse Code Beacon Keyer
|
| Lightning Activated Camera Shutter Trigger
|
| Simple metal detector electronic circuit
|
| Three Power Supplies for the Garmin GPS-20 Sensor Board
|
| Driving N-channel FETs from TTL
|
| Miniature Self-Powered Autonomous Robot
|
| Morse Code Practice Keyer 1
|
| Morse Code Practice Keyer 2
|
| 741 Light Sensor
|
| Fluid level detector
|
| The Aisin-Seiki GPS-Receiver (The "US$20 GPS")
|
| Morse code display
|
| Intercom schematic
|
| Scaling ADXL50 accelerometer output
Model and remote control schematics
|
| Snake throat muscle controller
|
| Handy cricket for robotic applications
|
| Incline Railway Control Circuit
|
| A Receive Signal Decoder
|
| 27Mhz toy car receiver
|
| 27Mhz toy car transmitter
|
| One ounce rocket ejection timer
|
| LED traffic lights
|
| Two-tone siren
|
| Proportional radio remote control
|
| Alf: The Robotic Matchbox car
|
| Seaplane schematic
|
| Model Rocket with Video Camera
|
| Signal breaking module
|
| RF serial link for robot
|
| PIC based rocket altimeter
|
| Robot with PIC16F84 brain & InfraRed eyes
|
| 0-10V control for RC servos
|
| Robotic microcontroller board
|
| Multi Rocket Launcher
|
| Model rocket launch controller
|
| Pad launch controller for model rockets
|
| Simple flashing light circuit
|
| Simple flashing light circuit
|
| A dual alternating flashing light circuit
|
| Simple flashing light circuit
|
| A dual tandem flashing light circuit powered by a 9 volt battery
|
| Simulate the Gyralite (dual flashing headlights).
|
| Simple train detector using ambient light and a photocell
|
| Simple charge rate monitor
|
| Deluxe charge rate monitor
|
| "CLONEPAC" memory module for Futaba 8UAF/8UAP
|
| Battery pack discharger
|
| Plane locator
|
| Plane locator 2
|
| Battery low voltage alarm
|
| Battery low voltage alarm 2
|
| Ultimate battery low voltage alarm
|
| R/C digital camera controller
|
| R/C helicopter camera
|
| Building an RF Remote Control System
|
| Motor walker circuit
|
| 250-amp Speed Controller for RC cars
|
| Spider robot electronic project page
|
| Two tone train horn
|
| R/C Emergency locator alarm
|
| Remote switch for radio-control aircraft accessories
|
| Radio Control Battery Backup
|
| Glow Plug driver for model engines
Motor and general control schematics
|
| Bridge head
|
| PWM motor controller
|
| Transistor relay driver
|
| Latching relay driver
|
| Relay delay circuit
|
| Touch switch
|
| Low voltage DC motor speed controller
|
| Flashing neon christmas lights
|
| Three input first response monitor
|
| Switch-on delay circuit
|
| Electronic thermostat
|
| LM3911 temperature controller
|
| Programmable light-activated relay
|
| Simple 10 Stage Control Box
|
| One component stepper motor driver
|
| Dual Stepping motor drivers using UDN2540
|
| PWM DC motor control with SG3525
|
| Stepper Motor Driver using TEA3718/3717
|
| Microstepping with PBM3960 and TEA3718
|
| DC Motor Driver with L6203
|
| Stepper Motor Driver using L298 and L297
|
| Several stepper motorol control circuits
|
| Wireless RF PWM dual motor controller
|
| H Bridge Motor Control Circuits
|
| Motor speed controllers
|
| Ceiling fan speed control
|
| Delayed off light switch
|
| Deoderizer fan timer
|
| Electronic Thermostat Relay Circuit
|
| Interfacing 5 volt CMOS to 12 volt loads
|
| Light Activated Relay
|
| CMOS Toggle Flip Flop With Relay(CD4013)
|
| 555 Timer Monostable Circuit Using Pushbutton
|
| Dual Channel Servo Pulse to H-Bridge Interface
|
| Current loop interface
|
| Switching solenoid driver
|
| Modular relay system
|
| Light/dark detector
|
| Pulse Width Modulation DC Motor Control
|
| Stepper motor controller
|
| Touch switch
|
| Pump controller
|
| H-Bridge motor controller (5 amps, 100 watts)
|
| Dual Channel Servo Pulse to H-Bridge Interface
|
| Servo pulse to PWM converter
|
| 12V Sump Pump Control
|
| Rolling code 4-channel UHF remote control
|
| DC Motor Speed Controller
|
| 3 Phase Brushless DC Motor Xtal Based Controller
|
| DC motor controller
|
| Garden moisture controller
|
| Overload Voltage Protection with Automatic Reset
|
| Pulse Width Modulator
|
| Pulse Width Modulator Motor Speed Control
|
| Pushbutton one-shot and latch (PDF)
|
| Charge coupled bi-directional power MOSFET relay (PDF)
|
| Finger touch activated switch (PDF)
|
| Machine vibration triggers hour meter (PDF)
|
| Solid state relay (PDF)
|
| Line-powered Xenon flash transmitter (PDF)
|
| 9V Xenon photoflash controller (PDF)
|
| AC switching with TRIAC from TTL
|
| Control 120VAC relay with TTL
|
| Driving a relay with a CPU
|
| Power-line Appliance Controller
|
| Simple Switched Servo Driver
|
| Combination-controlled, fully customizable RF remote control
|
| Thermoelectic controller (scriptable thermometer)
|
| Stepper motor positioner
|
| Stepper motor driver
|
| Thermostat
|
| Frequency switch
|
| PIC16F84 RF remote controller
|
| Stepper motor controller
|
| H-Bridge shematic
|
| DS1821 programmable thermostat
|
| Hot Water Tank Indicator
|
| Temperature monitor
|
| Cold activated switch
|
| Voltage comparator switch
|
| Dark activated switch
|
| DC Push Button Motor Control Circuit
|
| Light detector
|
| DC Motor Reversing Circuit
|
| Sound operated switch
|
| LDR light/dark activated relay switch
|
| Touch Switches
|
| 6090 digital decoder schematics
|
| Assorted relay control circuits
|
| Adjustable Voltage motor controller
|
| Serial servo controller
|
| DC Motor-Driver H-Bridge Circuit
|
|
