Full New Collection of Electro projects 4
- 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
- Laboratory Control System for Cold Atom Experiments
- Chaos generator
- Simple BFO metal detector
- Voltage Comparator Information And Circuits
- Light Activated Detector Circuit (LM393/LM555)
- PL tone generator (NE567)
- Full-duplex doorphone with 3 wires connection
- G Strain energy absorber
- RDS Encoder
- RDS Encoder
- Ultrasound detector
- Discrete Set/Reset Flip Flop
- Monostable Flip Flops (one shot)
- Discrete Bistable Flip Flop
- Sony RS-422 ADAT sync cable pinout
- Garmin Foretrex 101,201, Forerunner 101,201 to Serial DB9 cable schematic pinout
- Biasing Op-Amps into Class A
- 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
- Magnetic levitation device
- Tesla power receiver
- Lazer Tag Equipment Modifications
- Garmin GPS data interconnect
- Inexpensive APRS Weather Station
- Walking robot
- Basic op-amp circuits
- 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
- Circuit for gold wafer card
- Keys finder
- Electronic Eavesdropping Devices Detector
- Lightning Detector
- Geomagnetic field detector
- Seismic detector interfaces to datalogger
- Miniature magnetic gun (rail gun)
- High voltage stun gun
- Mini efficient magnetic coil launcher from disposable camera flash
- 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
- How to Make a Roomba Serial 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
- 2D3 Nixie clock Schematic
- Popular Electronics Ultrasound Detector
- An Inexpensive X-ray Machine
- Navigator 555A radio direction finder (RDF) circuit diagram
- Magnetic levitation circuit
- 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
- Common Ground for Older VPW Circuit
- Very basic circuits
- Bat detector
- FCTS Project
- Count Accumulator for Radiation Levels (CARL)
- Modifications for CDV700 Geiger Counter
- Smooth Tone Clickless CW Sidetone Generator
- Lightning Activated Camera Shutter Trigger
- Big Ear Stereo Parabolic Microphone
- Ultra Low Power LCD Indicator
- 12 Volt Toilet Tank Refiller
- Morse Code Beacon Keyer
- Lightning Activated Camera Shutter Trigger
- Cost Effective Multi-Spectral Scanner for Natural Gas Detection
- Simple metal detector electronic circuit
- Metal detector Mk1 - find hidden treasure at the beach
- Metal detector Mk2 - More sophisticated 5 transistor metal detector (BC547, BC557, BC338)
- Driving N-channel FETs from TTL
- 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
- Cloud charge monitor (PDF)
- Intercom schematic
- Scaling ADXL50 accelerometer output
Model and remote control schematics
- autopilot: Do it yourself UAV
- Snake throat muscle controller
- Handy cricket for robotic applications
- Traffic light controller with 20-output sequencing
- 556 Timer Stall-Motor Switch Machine Drivers
- 5 Times Around Circuit
- Audible Train Approach Warning Circuit
- Across The Track Infrared Detectors
- Automatic Reversing Circuit - Mk IV
- Rail Crossing Diamond Protection Circuit
- Automatic Railway Grade Crossing Flashers
- Incline Railway Control Circuit
- Model Railroad Odometer Car
- Turnout Anti-Derail Protection Circuits
- Various Transistor Throttles Cicuit Schematics
- Three Terminal Regulator Type Throttle (LM350K)
- Timed Uncoupling Ramp Driver (LM555)
- Grouped DCC Block Occupancy Detectors
- First Across The Line Race Scorer Circuits
- School Bus Signals Circuit
- Timed DC Throttle
- DCC - Zero Stretching Simulator (LM555)
- A Receive Signal Decoder
- 27Mhz toy car receiver
- 27Mhz toy car transmitter
- One ounce rocket ejection timer
- LED traffic lights
- Proportional radio remote control
- Alf: The Robotic Matchbox car
- Seaplane schematic
- Model Rocket with Video Camera
- Signal breaking module
- Animatronic Snake Throat Muscle Controller
- Electronic millipede robot
- Downed model locator
- Precision Receiver Battery Low Voltage Alarm
- Launch controller for multiple rockets
- Discharger for Receiver Battery Packs
- RC Receiver Battery Low Voltage Alarm
- Downed model locator Mark 2
- 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
- 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
- Level crossing for model railways
- Building a robot arn using Nitino muscle wire
- Signal module for model railways adds a high degree of realism
- Simple throttle control ideal for railway shuting yards or a second main track line
- Spider robot electronic project page
- Two tone train horn
- R/C Emergency locator alarm
- Remote switch for radio-control aircraft accessories
- Angelfire rocket GPS payload
- 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
- HIGH or LOW Power Switch For Lights or Small Motors
- Push Button Motor Control Circuits
- Motor speed controllers
- 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
- Anti-jam system for rotary diecut machine based on PIC16F84
- Bridge control for PLC using PIC18F84
- H-Bridge motor controller (5 amps, 100 watts)
- Dual Channel Servo Pulse to H-Bridge Interface
- Servo pulse to PWM converter
- Rolling code 4-channel UHF remote 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)
- No-Hum Fan Controller
- AC switching with TRIAC from TTL
- Control 120VAC relay with TTL
- Driving a relay with a CPU
- Power-line Appliance Controller
- Solid-state power controller
- High And Low Voltage Cut Off With Time Delay
- Optically isolated stepper motor controller
- Stepper motor controller
- 35KHz Magnetic-Radiation Remote-Control
- Voice activated switch using MC2830
- Combination-controlled, fully customizable RF remote control
- Thermoelectic controller (scriptable thermometer)
- Stepper motor positioner
- Thermostat
- Frequency switch
- PIC16F84 RF remote 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
- Constant Temperature Circuit
- PWM Motor Speed Controller / DC Light Dimmer
- Constant Temperature Circuit
- PWM DC Motor Speed Control
- Solenoid starter
- MOSFET based speed controller uses 9 IRFZ40 power MOSFETS
- CO2 controller for planted tanks
- Light activated relay
- Delayed shutter control for Kodak DC-20
- Gasoline generator automatic throttle controller
- MOSFET H-BRIDGE schematic and theory
Music related schematics (also see Audio)
- Audible metronome
- Visual metronome
- Peak-reading meters
- Octave screamer
- Amiga MIDI interface
- Apple Mac to MIDI synthesizer interface cable
- Apple Macintosh MIDI interface schematic (basic version)
- Apple Macintosh MIDI interface schematic (deluxe version)
- Standard MIDI to MIDI interface cable diagram
- Simple MIDI switcher
- MIDI interface / cable tester
- MIDI keyboard
- MIDI merger schematic
- 25-pin PC serial port to MIDI synthesizer interface cable
- 9-pin PC serial port to MIDI synthesizer interface cable
- Serial MIDI interface
- Microcontroller MIDI interface
- MIDI keyboard circuit
- Spring reverb unit
- MP3 Player
- Simple colour organ
- Guitar fuzz effect
- 8 note tune player
- Colour (Sound) Organ
- Transisor organ
- BookPC Car MP3 Player
- Yet Another Mobile MP3 Player
- Wave Multiplier for music synthesizers
- Miniature metronome
- Zonk Machine and Treble Booster
- Simple line mixer
- Simple MIDI tester
- MIDI Controller Footpedal
- DIY Serial MIDI Interface (80C51/80C31 Version)
- Electronic metronome
- Sound Effects Generator
- Sound Effects Generator 2
- Sound Lab Mini-Synth Guitar Trigger
- Digital Guitar Tuner
- Drum tone oscillators
- Analog MIDI synthesizer
- Spring reverb
- MIDI to CV interface
- Dual phantom power pre-amp
- Four channel fuzz box
- Theremin controller
- Vocal zapper
- MIDI drum machine project
- MIDI Drum Machine Analog Input Schematic
- Guitar Reverb Pedal
- Guitar Tremolo Unit
- Spring Reverb Unit For Guitar
- Ultra Simple Bass Guitar Compressor
- Vox AC30 Guitar Amplifier Simulator
- Guitar Vibrato Unit
- Musical Instrument (Expandable) Graphic Equaliser
- Midibox 64
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