Diagram circuit

Negative Supply from single positive Supply

Self switching Power Supply

Ultra low drop linear voltage regulator

Over / Under Voltage Cut-Out

High and Low Voltage Cutout with delay and Music

High Voltage, Low Current Supply

Simple Car Battery Charger

7 segment rolling display using PC

PC based Frequency Meter

Simple Analog to Digital Converter

Sawtooth wave generator

Simple variable frequency oscillator

Discrete component motor direction controller

Super simple stepper motor controller

Discrete component motor direction controller

Automatic Speed Controller for fans & Coolers

Alternating Flasher

Dancing Lights

Switch using a single Chip

Christmas Star

Running Message Display

Automatic Room Lights

Emergency Light

Automatic Dual output Display

Pot plant water tester electronic

Programmable Digital Code Lock

Ultrasonic Pest Repeller

Simple IF Signal Generator

TV remote control Blocker

Flashy Christmas Lights

JAM(Just A Minute) Circuit

Electronic Scoring Game

Soft ON/OFF switch

Control electrical appliances using PC

Car anti theft wireless alarm.

Dome light dimmer for Cars

Wiper Speed Control

Charge Monitor for 12V lead acid battery.

Audio level meter (vumeter)

Bass-treble tone control circuit

Audio Light Modulator

5 band graphic equalizer using a single IC/chip

Digital Volume Control

Ultrasonic Switch

Sound Controlled Filp Flop

Audio Visual Indicator for Telephones

Use the CD-ROM drive as a audio CD player without ...

Infrared Head Phones

Low cost intercom using transistors

Stereo Channel Selector

Brakelight Flasher

Melody generator for greeting cards

Timed Burglar Alarm

Infrared beam barrier/ proximity sensor

Beeper

Big Ben Sound

Police Siren

Factory Siren

DayLight Alarm

Fire Alarm

Water Level Indicator with alarm

A simple electronic buzzer ic

Rain Alarm

Power supply failure alarm