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Do It Yourself Projects #5

Posted 25 May 2005
Updated 27 May 2005

Here are some of the "Best of the Best" Projects and "How-To" Pages I've wandered upon in my treks across the Net.


Lighting

  • 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

  • Miscellaneous

  • Ultrasonic radar
  • 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
  • Chaos generator
  • Simple BFO metal detector
  • Voltage Comparator Information And Circuits
  • Build Your Own Digital Setting Circles For Your Astronomical Telescope
  • PL tone generator (NE567)
  • Bat detector
  • Bat detector microphone pre-amplifiers
  • 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
  • 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
  • A Visual CW Zero Beating Aid
  • A two-way Morse practice set
  • Magnetic levitation device
  • Tesla power receiver
  • Lazer Tag Equipment Modifications
  • Garmin GPS data interconnect
  • Inexpensive APRS Weather Station
  • Walking robot
  • 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
  • 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
  • Speech recognition using HM2007
  • 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
  • Navigator 555A radio direction finder (RDF) circuit diagram
  • Magnetic levitation circuit
  • PE3342 Programmer Schematic
  • 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
  • APRS GPS tracker schematic (PIC16C73)
  • Common Ground for Older VPW Circuit
  • Very basic circuits
  • Bat detector
  • FCTS Project
  • Smooth Tone Clickless CW Sidetone Generator
  • Morse Code Beacon Keyer
  • Lightning Activated Camera Shutter Trigger
  • Simple metal detector electronic circuit
  • Three Power Supplies for the Garmin GPS-20 Sensor Board
  • Driving N-channel FETs from TTL
  • Miniature Self-Powered Autonomous Robot
  • 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
  • Intercom schematic
  • Scaling ADXL50 accelerometer output



  • Power Supplies

  • Power supply provides +5VDC regulated, +10VDC unregulated and 7.5VAC
  • 13.5KV power supply
  • Kirlian device supply
  • LM317 adjustable power supply
  • LTC1265 Nicad charger
  • Single cell lithium battery charger
  • Smart battery charger
  • Battery charge indicator
  • Lead acid trickle charger
  • 12B Battery condition indicator
  • Alkaline battery charger
  • Alternative power source for Magellan GPS receivers
  • Power Tool Torque Control
  • Generating Negative 5 Volts from 9 Volt Battery
  • LED Battery Condition Indicator
  • LM317 Variable Voltage Regulator
  • LM317 Regulator With Pass Transistor
  • High Current Regulated Power Supply
  • Simple Variable Voltage Source
  • Various switching power supplies
  • Variable 3 - 24 Volt / 3 Amp Power Supply
  • 2 watt switching power supply
  • Variable Voltage and Current Power Supply
  • Low Power DC to DC Converter
  • Constant Current Battery Charger
  • Intelligent NiMH/NiCd switched mode fast charger
  • Variable DC power supply
  • Nicad battery charger
  • Simple power supply
  • Voltage converter
  • Bench power supply
  • Easy power supply
  • Valve power supply
  • 6V to 12V Converter
  • Tesla coil / HV generator
  • High Current Power Supply
  • Dual Polarity Power Supply
  • High Voltage High Current Power Supply
  • Transformerless Power Supply
  • Fixed Voltage Power Supply
  • Voltage Inverter
  • Voltage Inverter
  • Dual power supply
  • 1A Variable Regulated Power Supply
  • Negative voltage generator
  • 12V battery capacity tester
  • NE555 Low Voltage Battery Disconnect Circuit
  • 33 Volt DC To DC Converter
  • Automatic AC voltage (110/240) selector
  • Variable 0-5A Current Source
  • Ground Fault Interupter
  • Intelligent battery charger
  • 12 Volt DC Load Control and Battery Protection
  • Low battery indicator
  • Variable power supply
  • Switching Power Supply
  • Low Power DC Quadrupler
  • Surge protector
  • Ultimate power supply
  • Variable Regulated Power Supply
  • Power reminder beeper (PDF)
  • Unplugged power cord alarm
  • Machine power loss beepter (PDF)
  • Low-dropout 12V regulator (LM324)
  • HV supply: 12VDC in, 12KV out
  • Generating -5VDC from +5VDC
  • Filtering PC bus POWER
  • Bidirectionall power inverter
  • Nagative voltage generation using 555 timer
  • High current regulated power supply
  • One 9V battery gives +18, +25, +33V
  • +9V *and* -9V from one battery
  • Battery charger
  • Adjustable power supply using LM317
  • Simple +5V power supply circuit
  • 12 Vdc - 120 Vac Inverter Schematic
  • +12V/-12V Power supply unit
  • +/-12V -> +/-5V Power unit
  • +5V Switching regulator (1)
  • Switching regulator (2)
  • Electric power controller
  • +30V power supply with +5V
  • +30V DC-DC converter
  • DC/AC inverter (2)
  • DC/AC inverter (1)
  • PIC16F873 DC motor speed controller
  • 12V 30A power supply
  • Dual regulated power supply
  • Fuse blown indicator
  • Gyrator circuit
  • Variable power supply
  • LM317 Regulator Circuit
  • Nicad battery charger
  • Regulated 12V supply
  • Unregulated power supply
  • Snowmobile GPS power adapter
  • Simple switching power supply
  • Assorted power source and control circuits
  • 12 volt battery monitor
  • 12 volt power supply
  • 5 volt power supply
  • Battery voltage monitor
  • LM3914 battery monitor
  • Multiple voltage power supply
  • Voltage doubler
  • Voltage inverter
  • PWM Motor Speed Controller / DC Light Dimmer
  • PWM Motor/Light Controller
  • Low Power LED Voltmeter
  • PWM Motor/Light Controller
  • PWM Motor/Light Controller variants
  • Low Power LED Voltmeter
  • Temperature Controlled NICD Charger
  • Simple Capacitance Multiplier Power Supply For Class-A Amplifiers
  • Simple DC Adapter Power Supply
  • Variable Dual Lab Power Supply
  • Battery Charger Ideas
  • Power control for arc welders and other inductive loads
  • Charger for gel lead acid batteries
  • Nicad battery cycler
  • Battery Characterizer
  • Nicad Battery Discharger/Capacity Indicator
  • 200 Watt Modified PC Power Supply 13.5 Volt 14 Amp

  • Solar Power

  • Sun tracking circuit for solar arrays
  • Solar power recharger
  • Solar power supply
  • Solar charge controller
  • Solar robots
  • Solar Tracker
  • 1381 solar engine
  • D1 solar engine
  • FLED solar engine
  • PM1 solar engine
  • Solar car array controller schematic
  • Solar car battery monitor schematic
  • Solar car brake controller schematic
  • Solar car main controller schematic
  • Solar car display controller schematic
  • Solar car electrical design and circuit index
  • Portable solar battery charger
  • Sensor Electronic Tracker with H-Bridge Drive
  • Sensor Electronic Tracker with Simple Solar Charge Controller
  • Solar tracking control system
  • LED7 solar tracker
  • Solar step-down regulator
  • Zener-based solar engine
  • AA battery solar charger
  • AA battery solar charger
  • Solar Panel Charge Controller / Low Voltage Disconnect Circuit
  • Solar Panel Current Meter
  • SCC2 10 Amp Solar Charge Controller
  • Solar Charged LED Flashlight
  • AA battery solar charger
  • Solar Panel Charge Controller / Low Voltage Disconnect Circuit
  • Solar Panel Current Meter
  • Solar cell Nicad charger
  • Solar powered dock lamp flasher

  • Telephone and Intercom

  • Telephone recording circuit
  • Infinity Transmitter Schematic and Plans
  • Digisound ring modulator
  • Incoming call indicator
  • Telephone Ring Generator Using 60Hz Power Transformer
  • Telephone Ring Generator Using Switching Power Supply
  • Telephone In-Use LED Indicator
  • Telephone In-Use Relay Circuit
  • Telephone Audio Interface
  • Telephone interfacing / caller ID using a PIC microcontroller
  • Home made PBX / PABX
  • Ringing Phone Light Flasher
  • Phone Busy Indicator
  • FM Telephone Bug
  • Cut Phone Line Detector
  • Simple Phone Tap
  • Telephone Hold Button
  • Telephone Recorder
  • 300 baud modem circuit schematic
  • DTMF Generator/Decoder
  • Interface cables for various cell phones
  • Telephone music on hold box
  • Telephone ring controlled relay
  • 1-line telephone status indicator (PDF)
  • Line in use indicator (PDF)
  • 4-line telephone status indicator (PDF)
  • Caller ID decoder
  • Telephone in use light
  • Detecting a telephone RING
  • Phone In-Use Light
  • Phone to audio interface
  • Phone Off-Hook Indicator
  • 'phone rang' indicator light
  • Phone Line to Audio
  • Phone in-use
  • Telephone Line Monitor
  • Use old phones as an intercom
  • Phone-In-Use indicator
  • Hold function for Telephone
  • Digital/Standard Phone Line Tester
  • Caller ID decoder part 1
  • Caller ID decoder part 2
  • DTMF decoder / logger
  • FM telephone bug
  • Universal telephone hold
  • Talking phone dial monitor
  • Telephone line simulator
  • Telephone privacy adapter
  • Telephone ringing circuits
  • Simple circuit to connect telephone equipment to audio mixer
  • NCDS Interface Schematic for Nokia 3110, 8110, 8110i
  • Assorted telephone circuits
  • Greek telecard reader
  • Phone ring circuit schematic
  • Cut phone line detector
  • Telephone autodialler
  • Taxi phone automatic dialler

  • Video

  • Video Clock Superimposer
  • Video clock superimposer using PIC16C711
  • Simple AV (audio / video) wireless 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
  • Driver for multiple VGA monitors
  • CCD (charge coupled device) support board
  • Closed-Caption Decoder
  • PIC-Tock video clock
  • Video/Audio Wireless Transmitter
  • Video signal amplifier
  • RGB video digitizer
  • Color Bar Generator
  • Microcontroller test pattern generator
  • NTSC Video Distribution Amplifier
  • Commodore RF modulator
  • Video signal edge enhancement
  • Video amplifier
  • Video/Audio Wireless Transmitter
  • 4 Stage 555 Timer for Video Cam Control
  • Digital volt meter with video output
  • 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
  • AVR (AT90S2313) composite PAL colour bar generator
  • Homebuilt video digitizer Mark I
  • Homebuilt video digitizer Mark II
  • TV transmitter (PDF)


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