Electronics study & Lab projects

• 10 GHz CW Radar based on a X-band Gunnplexer
• 12 Volt Toilet Tank Refiller
• 1uS light pulse descriminator plus F to V converter (PDF)
• 1uS light pulse receiver plus post amp (MISC)
• 2D3 Nixie clock schematic using Atmel microcontroller
• 6 Pole ElectroMagnet Motor (aka Simple Brushless motor)
• 741 Light Sensor
• A small collection of quick to build electronic circuit designs
• A Two-Way Morse Practice Set
• Air flow detector
• Air flow detector using an incandescent lamp to detect airflow
• Amateur weather station to APRS interface ALWXI-01
• Analog computer
• Analog opto-isolator
• Analog pulse counter
• APRS system for GPS tracking
• Assorted digital circuits
• Aurora Alarm: Automated Detection System for the Northern Lights
• Barry's Coilgun Mark I circuit diagrams
• Barry's Coilgun Mark II circuit diagrans
• Barry's Coilgun Mark III circuit diagrans
• Barry's Coilgun Mark IV circuit diagrans
• Barry's magnetic levitation project
• Basement doorbell beeper (PDF)
• Basic Homebuilt Discrete DTL gate circuits (Diode Transistor Logic)
• Basic opamp circuits
• Bat detector
• BayComm packet modem
• Beat Balance Metal Detector
• Biasing Op-Amps into Class A
• Big Ear Stereo Parabolic Microphone
• Black Light
• Bleeper box for time reference
• Broadband 2MHz optical fiber receiver (PDF)
• Broadband 5MHz optical fiber receiver (PDF)
• Build logic gates using discrete parts
• Build your own UFO Bino-Scope unit - upgrade binoculars to become a photosensitive bino-scope
• Build Your Own Video-Rate 2-photon Microscope
• Building a Hardware Random Bit Generator
• Capacitance to Voltage conversion
• Capacitive Sensor
• Cat or Dog Detector - can be used to control entry on a Cat or Dog Door
• Chaos generator
• Circuit diagram for Coilgun Pistol Pskov 1100
• Circuit diagrams for making logic gates from discrete components
• Circuit for driving a liquid crystal (LCD) shutter to simply pass or block light
• Circuit for gold wafer card
• Circuit for temperature stabilization of a MTP3055E MOSFET
• CMOS based electric fence design
• CMOS Logic Experiments
• Coil Coupled Operation Metal Detector
• Color sensor circuit
• Computerize Your Room/Home
• Count Accumulator for Radiation Levels (CARL)
• CW Tone Keyer
• Dekatron circuit diagram - device used for dividing by 10 during the valve era
• Delayed shutter control for Kodak DC-20
• Digg Button Kit
• Digital Call Sign Annunciator
• Digital Radar Speedometer
• Digital Remote Thermometer
• Dinsmore 1490 digital compass
• DIY 3-axis CNC milling device
• DIY Plasma Globe using an automotive ignition coil
• DIY Tesla coil - DC Powered with Plasma Output
• Doorbell for the Deaf
• Driving N-channel FETs from TTL
• Easy Morse Code Keyer Circuit
• Electric field disturbance monitor
• Electromagnetic field detector
• Electromagnetic Field Probe with Meter Output using an LF351 opamp
• Electronic canary doorbell
• Electronic dazer
• Electronic inclinometer ("clino"), a surveying device
• Fantastic Atom Expander
• FCTS Project
• FET based metal detector using MPF102 / J310 BF998 FETs
• Fish caller circuit
• Fluid level detector
• FM Morse Code Keyer
• Fogger smoke machine controller
• Full-duplex doorphone with 3 wires connection
• G Strain energy absorber
• Garmin Foretrex 101,201, Forerunner 101,201 to Serial DB9 cable schematic pinout
• Garmin GPS data interconnect
• Geiger counter
• Geomagnetic field detector
• GoldPic 3 Pulse Induction Metal Detector (has electronic kit available)
• GPS receiver support kit
• Hacking the Hot Wheels Radar Gun - includes circuit of analog front end
• High Quality Intercom
• High Speed ISO9141 Interface using Motorola MC33290D ISO driver IC
• High voltage stun gun
• High voltage zappers
• High-speed 75MHz light receiver (PDF)
• Home-Built Magnetic Levitator
• How to Make a Roomba Serial Interface
• Hydrogen Generator, PWM Circuit
• Induced voltage sensor delta-peak trigger for coilgun
• Induction receiver for tracing wiring behind walls, hearing lightning and other electric discharges
• Inexpensive APRS Weather Station
• Inexpensive seismometer project
• Insect Repellant
• Insect Repellant (22KHz audio oscillator)
• Intercom schematic
• Interesesting circuits using diodes ideal for education or introductory courses on electronics
• Ion detector
• Jacob's Ladder
• Jacob's Ladder
• Kenwood TH-D7 NMEA GPS bug fix
• Laboratory Control System for Cold Atom Experiments
• Lazer Tag Equipment Modifications
• Lie detector
• Light Activated Detector Circuit (LM393/LM555)
• Lightning Detector
• Lightning detector circuit diagram
• LNS Technologies Levitator Kit circuit diagram
• Lost keys finder using HCF4069
• Low Voltage Alarm
• Low-power optical interrupter (PDF)
• Magnetic Gun.
• Magnetic levitation device
• Magnetic levitation project from Electronics Now, February 1996
• Magnetic levitation project from Popular Electronics, May 1966
• Magnetic levitation project from Popular Electronics, May 1989
• Mains Remote-Alert - Remotely operates beeper and/or a LED via mains supply line
• Metal detector Mk1 - find hidden treasure at the beach
• Metal detector Mk2 - More sophisticated 5 transistor metal detector (BC547, BC557, BC338)
• Mini efficient magnetic coil launcher from disposable camera flash
• Miniature magnetic gun (rail gun)
• Miscellaneous 741 opamp schematics
• Miscellaneous Circuits for Idea Purposes
• Miscellaneous simple circuits
• Mobile APRS / GPS tracking system
• Modifications for CDV700 Geiger Counter
• Modulated light receiver circuit (PDF)
• Monitor output from Motorola Oncore GPS engine in HP Z3801A in GPS Disciplined Oscillator
• Morse Code Beacon Keyer
• Morse code display
• Morse Code Practice Keyer 1
• Morse Code Practice Keyer 2
• Morse monitor
• Morse paddle keyer
• Navigator 555A radio direction finder (RDF) circuit diagram
• Negative Ion Detector
• Negative Ion Generator
• Nocturnal Animals Whisker
• Nokia 3310 Lcd Thermometer using DS18B20
• omentary High Voltage Arc Circuit - can be used to Ignite a barbeque or a Gas in a Potato Gun
• Op-amp circuits for detectors, filtering, and power applications including photodiodes (PDF)
• Open loop pulse trigger module for coilgun
• Optical speed trap to measure the the velocity of the projectile
• Optical trigger module for coilgun
• PASCO scientific model SF-9211 stroboscope schematic (PDF)
• Photo sensor application note showing photodiode and phototransistor circuits
• Photodiode primer and interface circuit diagrams including photovoltaic and photoconductive modes
• Plant Watering Watcher (moisture meter)
• Popular Electronics Ultrasound Detector
• Power MOSFET module for coilgun
• Powerful stun gun / taser circuit diagram
• Project for experimenting with magnetic levitation
• Pulse width modulators (PWM)
• Pulse width to voltage converter
• Rain Detector
• Random noise generator
• Scaling ADXL50 accelerometer output
• Seismic detector interfaces to datalogger
• Select of interesting electronic circuits that require only a single transistor ideal for education
• Selection of run circuits to experiment with the 4017 CMOS decade counter chip
• SIM card reader circuit diagram
• Simple BFO metal detector using 2N3906 and 2N3904 transistors
• Simple DTMF Repeater Controller using PIC16F84
• Simple electronic keyer
• Simple Frequency Reader for conversion VFOs
• Simple Lie Detector
• Simple metal detector circuit using BC547
• Simple moisture indicator
• Simple nitrogen spark generator (PDF)
• Single chip metal detecor with a range of a few inches based on CS209A
• Small selection of useful circuits
• Solid state tesla coil
• Solid State Tesla Coil and Wireless Power
• Sony RS-422 ADAT sync cable pinout
• Sound finding cricket
• Sound finding cricket with phase detector
• Spy circuits
• Static Electricity / Negative Ion Detector
• Stroboscope
• Stun gun / taser circuit diagrams
• Suddent ionospheric disturbance (SID) receiver
• Switch debouncer circuits including transistor, CMOS logic and a 555 timer based design
• Tesla coil
• Tesla coil
• Tesla power receiver
• Texas Instruments collection of buffer op-amp circuits for ADC
• Texas Instruments collection of differential op-amp circuits (PDF)
• Three stage induced voltage triggered coilgun
• Thyristor fired coilgun circuit diagram
• Time to dust indicator - battery powered dust indicator (PDF)
• Touch activated switch using CD4011 CMOS NAND gate
• Touch switch using transistors
• Touch switches
• Transresistance photodiode amplifier that behaves as a current-to-voltage converter
• Two-component metal detector using a 4093
• Two-tone doorbell using 555 timer
• u-Blox GPS receiver board
• Ultra Low Power LCD Indicator
• Ultrasonic dog whistle
• Ultrasonic Pest Repeller
• UltraSonic Radar
• Ultrasonic sonar unit using MAX232 to drive ultrasonic transducer
• Ultrasonic sound detector / sniffer
• Ultrasonic switch
• Ultrasonic transducer oscillator circuit
• Ultrasound detector
• UV light box
• Vareity of circuits for interfacing to/from TTL logic
• Variety of applications using a CMOS 4001 2-input NOR gate including a PCB layout
• Very basic circuits
• Visible and Infrared Light Detectors
• Voice activated switch (VOX) circuit diagram
• Voltage Comparator Information And Circuits
• Waveform conversion
• Weather station with pressure reading, relative humidity, indoor & remote temperature reading