Do It Yourself Projects #5

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

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

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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

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QSL.NET Advertising Info

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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

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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

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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

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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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