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Battery Charger





Dual Mode Charger




Nicad Charger




Fast Charger for Nicad Batteries




200-mA/Hour, 12-V Nicad Battery Charger



Super Simple NiCd/NiMH Charger

Build your super simple charger




Simple and Powerful DC to AC conterver

Less than 12 component







More circuit

Inductance Calculations  


Is high Voltage or Current cause  get shock ?

Universal Ding Dong

10V to 12V LED Voltmeter Bargraph Metering

Green USB Switch

Smooth Flasher

Bell Alarm

Breadboard Project Protector

LED Lighting For Your CAR

Ballast For Energy-Saving Lamps

White Noise Generator-Sound Check

Put That Light Out

Store It Quickly !

Automatic Aquarium Feeder

Freeze Door Alarm



Medium-Power FM Transmitter

Quality FM Transmitter

4 Watt FM Transmitter with direction complete


Audio circuit

Balanced microphone preamplifier

Audio Power Amplifier

100 Watt Single Chip Amplifier


Power Supplay-Charger

Computer Controlled Power Supply

Adjustable  1.2V to 37 V  1.5A Supply

A few Simple Power Supplies

Very Simple Powerful DC to AC converter

Solar Cell Voltage Regulator

Battery Booster

200-mA/Hour, 12-V NICAD Battery Charger

Fast Charger for NICAD Batteries

NICAD Charger

12V Fan Directly on 230V

Super Simple NiCd/NiMH Charger

Mini Voltage Generator

Dual Mode Charger




Litle Notes

Shock Current Path












 Other Circuit

  Delay Timer

  LED and Lamp Flasher and Metronome

  Clapp Oscillator

  Simple Light Meter

  Light Sensitive Voltage Divider

  Light Activated Relay

  Pressure Pad-Step On It

  Simple Siren

  Single-transistor timing circuit 

  Missing Pulse Detector

  Electronics stethoscope

  USB to RS 232 cable

  Scarecrow Animal Deterrent  

  Mains on Delay Circuit

  Missing Pulse Detector 555

  Video Isolator

  Discrete PWM Generator

  Simple One-wire Touch Detector


  Project at July '09

  Automatic Emergency Lighting Unit

  Signal Powered Dynamic Compressor

  Stereo Noise Filter

  Car Battery Monitor

  Simple CMOS Squarewave generator

  SimpleLSTTL SquareWaveGenerator

  Super Simple Touch Switch

  Electronic Gong

  Zero Crossing Detector

  Voltage Mirror


 Bonus Download

  Units Converter







  The Secret




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