Video related schematics

· Video Clock Superimposer

· Simple TV transmitter

· Audio / video distribution amplifier

· 10GHz video link

· Experimental macrovision remover

· 8 x 8 Audio-video switch

· VHF/UHF TV modulator

· LH0032 video amplifier

· LM359N video amplifier

· Macrovision code remover

· 2.3GHz ATV Transmitter

· Driver for multiple VGA monitors

· CCD (charge coupled device) support board

· 8-input 2-channel Audio and Video Switch with Keypad control

· AM modulator to add AM television to small FM transmitter

· Video amplifier

· Closed-Caption Decoder

· PIC-Tock video clock

· Video/Audio Wireless Transmitter

· Video signal amplifier

· RGB video digitizer

· Digital video processor

· MC1374 based TV transmitter

· TV transmitter

· Simple TV transmitter

· Color Bar Generator

· Microcontroller test pattern generator

· NTSC Video Distribution Amplifier

· Commodore RF modulator

· Video signal edge enhancement

· Video amplifier

· Video stabilizer

· Video/Audio Wireless Transmitter

· 4 Stage 555 Timer for Video Cam Control

· Digital volt meter with video output

· VHF Audio Video Transmitter

· LH0024 video amplifier

· Video to RF Modulator

· Video switcher (PDF)

· Video switcher

· TV/Radio antenna cable galvanic isolator

· S-video to composite video adapter

· VGA converter for video projectors and fixed frequency monitors

· VGA to TV converter

· VGA to PAL and NTSC converter

· PIC micro frame grabber (TDA8708)

· Low cost audio/video modulator and transmitter

· Many video amplifier circuits includiing transmission over UTP (PDF)

· Commodore 64 Video Modulator 251025 Schematics

· Commodore 64 Video Modulator 251696 Schematics

· TV RGB signal output from a SVGA graphics card

· Macrovision removal

· Panasonic TR-329B AC-DC Portable TV

· Homebuilt video digitizer Mark I

· Homebuilt video digitizer Mark II

· TV transmitter (PDF)

· CCD camera frame grabber

READ MORE - Video related schematics

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

· Light activated relay

· Simple 10 Stage Control Box

· Simple PWM circuit

· 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

· DTMF controlled switch

· 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

· DC Motor Constant Speed Control

· 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

· H-Bridge shematic

· DS1821 programmable thermostat

· SN754410 Dual Motor Driver Board

· 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

· Furnace fan speed controller

· Remote two-wire stepper motor positioner

· Drill shaft speed monitor

· PWM Motor Speed Controller / DC Light Dimmer

· Constant Temperature Circuit

· PWM DC Motor Speed Control

· Solenoid starter

· CO2 controller for planted tanks

· Light activated relay

· Voice activated switch - MC2830

· Delayed shutter control for Kodak DC-20

· Gasoline generator automatic throttle controller

· Block power switching module

· MOSFET H-BRIDGE schematic and theory

READ MORE - Motor and general control schematics

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

· Autonomous airplane

· 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

· 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

· 12 relay launcher for model rockets

READ MORE - Model and remote control schematics

Miscellaneous schematics

· Ultrasonic radar

· 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

· How to generate a Rotating Field

· Chaos generator

· Simple BFO metal detector

· Voltage Comparator Information And Circuits

· Electromagnetic Levitator

· Build Your Own Digital Setting Circles For Your Astronomical Telescope

· PL tone generator (NE567)

· Bat detector

· Bat detector microphone pre-amplifiers

· DGPS receiver

· Full-duplex doorphone with 3 wires connection

· G Strain energy absorber

· RDS Encoder

· Toggle Switch Debounced Pushbutton

· RDS Encoder

· 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

· Analog computer

· BayComm packet modem

· Morse monitor

· HamComm modem interface

· Morse paddle keyer

· UV light box

· Voice activated tape recorder switch

· 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

· A Visual CW Zero Beating Aid

· A two-way Morse practice set

· Magnetic levitation device

· Tesla power receiver

· Lazer Tag Equipment Modifications

· Pulse pperated Ni-Cd battery zapper

· Garmin GPS data interconnect

· Inexpensive APRS Weather Station

· Walking robot

· Vibrating Pocket Bug Detector

· 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

· Griffith Observatory Tesla Coil

· Fogger smoke machine

· Dinsmore 1490 digital compass

· Geiger counter

· Electric field disturbance monitor

· Inexpensive seismometer project

· Digital dial

· 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

· Magnetic levitation circuit

· PE3342 Programmer Schematic

· Schmidt Trigger

· u-Blox GPS receiver board

· Assorted digital circuits

· Basic electronic circuits

· Miscellaneous simple circuits

· Digital Call Sign Annunciator

· Ultrasonic switch

· Sound finding cricket with phase detector

· Sound finding cricket

· APRS GPS tracker schematic (PIC16C73)

· No loss capacitor

· Discrete logic decimal to BCD converter

· Doorbell extender

· Earthquake detector

· Electromagnetic levitator

· Jacob's ladder

· Magnetic ball levitator

· Photodiode amplifier

· Relative wind angle indicator

· Solid-stateTesla coil

· Very basic circuits

· Bat detector

· FCTS Project

· Smooth Tone Clickless CW Sidetone Generator

· Morse Code Beacon Keyer

· Lightning Activated Camera Shutter Trigger

· Three Power Supplies for the Garmin GPS-20 Sensor Board

· Driving N-channel FETs from TTL

· Miniature Self-Powered Autonomous Robot

· Electronic Dazer

· 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")

· Voltage follower with 1G ohm input (LM11)

· Double-ended flashing voltage monitor - LM10

· Morse code display

· Intercom schematic

· Pulse Induction Metal Detector

· Scaling ADXL50 accelerometer output

READ MORE - Miscellaneous schematics

Misc audio (also see Music, Amplifiers, Preamp)

· Pink noise generator

· A Schottky-based Saw-to-Tri converter

· Saw to triangle converter

· Improved saw to triangle converter

· Voltage controllable LFO

· White noise generator

· Electronic siren

· Two-tone siren

· Underwater microphone

· Code practice oscillator

· Noise generator

· Electronic whistle

· Low Frequency Sinewave Generators

· Horror movies sound effects

· Sound amplifier

· Temperature sensitive oscillator

· 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

· Ultrasound detector

· 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

· NHT subwoofer amp

· 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

· Fender Champ Replica

· Keyboard scanned 8-tone generator

· Audio test station

· Audio tone VU meter

· Pink noise generator

· 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

· 110 dB beeper - 74C14

· Audio output level meter

· Surround Sound Decoder Mk2

· Stereo compressor

· Audio mixer

READ MORE - Misc audio (also see Music, Amplifiers, Preamp)