Alarms and security related schematics

• Proximity alarm
  
• Electronic lock
  
• Intermittent alarm generator
  
• Burglar alarm
  
• Electronic door codelock (PIC16F84)
  
• Moisture alarm
  
• Automatic Entry Control System
  
• Fridge door alarm
  
• Ultrasonic remote control & alarm system
  
• Wire loop alarm
  
• 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
  
• 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
  
• Alarm loop sensor (LM3915)
  
• Touch triggered alarm
  
• Universal alarm system
  
• Warning strobe flasher for alarm systems
  
• Collection of alarm circuits
  
• PIR motion detector light controller
  
• Micropower wireless motion detector transmitter
  
• Touch activated alarm system
  
• Combination Lock (Simple Version)
  
• Combination Lock (PIC16F84)
  
• Low power RFID transponder
  

  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
  
• Amplified ear
  
• 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
  
• JLH Headphone Amplifiers
  
• 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
  
• 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
  
• 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
  

  Audio preamp circuits

• Microphone amplifier
  
• RIAA phono amplifier
  
• Low impedance microphone amplifier
  
• mu-stage microphone preamp
  
• Solid state microphone preamp
  
• Dynamic microphone preamplifier
  
• Sound blaster 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
  
• Hi-Fi Preamplifier
  
• Crown IC-150A Preamplifier (PDF)
  

  Automative, car and motorcycle schematics

• Electronic auto stethoscope
  
• Turn signal alarm
  
• Motorcycle turn-signal system
  
• Cigarette lighter 9V adaptor
  
• Race cart or car datalogger
  
• Analog Tachometer for Gasoline Engines
  
• Headlight On reminder with Light
  
• Flashing High Intensity LED 3rd Brake Light
  
• Adaptive Windscreen Wiper Control
  
• Car clock
  
• Car message display
  
• Car interval wiper
  
• Safety indicator light
  
• Speed limit alert
  
• Car power supply for MP3 player
  
• Car power supply for MP3 player Mk 2.5
  
• 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
  
• PC based EFI programmer
  
• 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
  
• Car burglar alarm
  
• Auto to trailer lights interface
  
• Car locator (RF based receiver / transmitter)
  
• 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
  
• Economy radar detector
  
• 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
  
• Datalogger based on 68HC11
  
• 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
  
• ADC-x RS232 Interface Schematic (PDF)
  
• 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
  
• Network of RS485 temperature sensors
  
• Digital compass schematic
  
• Temperature datalogger
  
• Accelerometer Schematic
  
• Serial Port A/D-converter
  
• Centronics port D/A converters and low-pass filter
  
• LCD Thermometer
  
• Wireless Liquid Level Sensing for Restaurant Applications
  
• Pressure Sensor-Based Altimeter Circuit
  
• Ultrasonic range finder circuit
  
• 8-bit analog to digital converter (ADC)
  
• Clockless analog to digital converter
  
• Low-resolution BCD analog to digital converter
  
• AD converter with tracking / sample-hold
  
• Analog to digital converter with switching preamplifier
  
• Simple flash A/D converter
  
• Low-cost A/D converter
  
• Logarithmic A/D encoder
  
• 1-wire barometer
  
• Water-level sensor
  
• Addressable ADC
  
• Wireless weater station
  

  Filter schematics

• Voltage Controlled State Variable Filter
  
• Galaxy Noise Filter
  
• RC Notch 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
  
• Single-Supply Sallen Key Notch Filter
  
• Single-Supply Twin T Butterworth Low Pass 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
  
• Voltage controlled filter and oscillator
  
• "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
  
• Video ping pong game
  
• Big Mouth
  
• MBC5/CPLD for the GameBoy
  
• GameBoy Camera Parallel Port Interface
  
• Wireless quiz show system
  
• 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
  
• PowerGlove Interface
  
• 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
  
• Applause meter
  
• Fart strength meter
  
• Model train throttle control
  
• DIT shutterglasses controller
  
• Furby circuit
  
• 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
  
• USB to infrared adapter
  
• 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 remote control system for PC
  
• IR Receiver (Amplitude Modulated IR)
  
• IR Transmitter for Audio (Amplitude Modulated IR)
  
• Digibox interface
  
• IR remote control
  
• IR remote control jammer
  
• Long Range Infrared Remote
  
• LCD + IR circuit schematic
  
• 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
  
• 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
  
• Infrared repeater
  
• 40khz IR Tester
  
• 555 timer 40khz IR Oscillator
  
• IR detector / emitter
  
• Fire-Stick infrared remote control
  
• Simple infrared remote control
  
• Infrared / Ultrasonic beacon
  
• Infrared transmitter / decoder
  
• Infrared logic probe
  
• 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
  
• Simple laser communicator
  
• LASER listening device
  
• LASER transmitter / receiver
  
• RS-232 Laser Transciever
  
• HeNe laser power supply schematics
  
• 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
  
• 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
  
• Diode Laser Power Supplies
  
• Ar/Kr Ion Laser Power Supply Design
  
• Laser light show
  
• Laser light show pattern generator
  
• Simple laser communicator
  

  LED related schematics

• LED Flasher
  
• LED pulser with audible output
  
• IR Illuminator
  
• Flashing Christmas LED display
  
• ICL7660 LED flasher
  
• Variety of LED circuits
  
• Winking LEDs
  
• LED flashing light
  
• LED initials
  
• 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
  
• LED Stroboscope - Maintains constant brightness at all flash rates
  
• White LED circuits
  
• Assorted LED circuits
  
• LED Mood Light
  
• LED Audio VU Meter
  
• Scrolling LED sign
  
• 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
  
• Flashing flashlight
  
• Flashing road baricade for construction workers
  
• Hand clap lamp control
  
• 600W 120VAC lamp dimmer
  
• 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
  
• Smart 12V light dimmer (PDF)
  
• 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
  
• 10-channel follower for Austin Hotel
  
• 12V Color organ and reverb unit
  
• 8-bit digital firing circuit
  
• Audio trigger circuit for light chasers
  
• Christmas star
  
• Electronic candle
  
• Electronic candle V2
  
• Fluorescent light dimmer
  
• Strobe light
  
• LED Mood Light
  
• LX-800 Lighting system
  
• Xenon Strobe Light
  
• Lamp flasher/dimmer
  
• Efficient dc lamp dimmer - 74C14
  
• Instrument panel lamp dimmer control
  

  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
  
• Heart rate monitor
  
• ECG amplifier
  
• Simple lie detector
  
• 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
  
• PC-based biofeedback monitor
  
• Pain field generator
  
• 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
  
• Simple RS232C Level Converter using Transistors
  
• 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
  
• Atmel 89C Series Flash Microcontroller Programmer
  
• AT89C2051 real-time controller
  
• PIC12C508 Night-light saver
  
• AT89C2051 Night light saver
  
• Atmel 8051 Flash Based-Microcontroller Programmer
  
• AT89C2051 Digital thermometer and clock
  
• PIC16F84 CW decoder (PDF)
  
• 12C508 Smart Lock
  
• Build a PIC controlled DDS VFO, 0 to 6 MHz
  
• PIC controlled DDS VFO, 0 to 6 MHz
  
• Basic Stamp Lightning Activity Monitor
  
• TCP/IP stack and WWW server in a PIC16F84
  
• 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
  
• Programmer PIC16F84,12C50x and EEPROM 24Cxx
  
• RDS Encoder - digital part
  
• PIC programmer for serial port
  
• PIC 18 programmer (PIC18F458, PIC18F452, PIC18C252, PIC16C745, PIC18F6620, PIC18F6720)
  
• Freign vocabulary recollector
  
• 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
  
• 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
  
• PIC18 Schematic
  
• Atmel AVR programmer
  
• Microchip PIC ICSP implementation
  
• 101 AT Keyboard to ASCII Decoder using 68HC705J1A MCU
  
• DTMF tone decoder using Basic Stamp
  
• LCD Serial Terminal
  
• Propellor clock (PIC16F84)
  
• World's smallest PIC programmer
  
• PIC X1 schematic (PIC16F877)
  
• Optical sensor using PIC12C508
  
• Interfacing S-7800A to PIC16F877