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Author Topic: 2000 Schémas  (Read 45055 times)
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egealtay
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« on: September 02, 2007, 11:48:57 23:48 »


http://www.reality.be/elo/labos2/schematics.htm

Proximity alarm

Electronic lock

Electronic door codelock (PIC16F84)

Moisture alarm

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

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

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

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)

Freign 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

Mp3 player module

10 tricks for interfacing to the PIC16C508

Interfacing the PIC16C508

PIC 5x7 display

Analog to digital conversion notes

Multi-chip programmer

Misc audio (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

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mylogin
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« Reply #1 on: December 29, 2007, 06:31:07 06:31 »

not all links works, some are no longer exist.
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Ante
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« Reply #2 on: January 02, 2008, 05:19:47 17:19 »

I agree many links end up as a 404 error. The site is probably not maintained for quite some time and the links are obviously not updated. Too bad.  Sad
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« Reply #3 on: July 21, 2008, 05:19:54 17:19 »

Better try the site www.explorecircuits.com/circuits.htm
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ajmain
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« Reply #4 on: January 18, 2009, 01:50:59 13:50 »

Check out  www.zen22142.zen.co.uk/schematics.htm
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