More Projects

15-Step Digital Power Supply

2-Line Intercom-Cum-Telephone Line Changeover Circuit

33-Volt Tuning Voltage

40-Metre Direct Conversion Receiver

7MHz CW/AM QRP Transmitter

9-Line Telephone Sharer

A Hierarchical Priority Encoder

A Highly Efficient DC Lamp Dimmer

Accurate Electronic Stop-Watch

Add-On Stereo Channel Selector

Anti-Bag-Snatching Alarm

Anti-Theft Alarm For Bikes

Anti-Theft Security For Car Audios

Appliance Timer

Appliance Timer-Cum-Clap Switch

Atmel AVR ISP Dongle

Audio Amplifier for Personal Stereo

Audio-Visual Extra Ringer For Phone

Auto Reset Over/Under Voltage Cut-Out

Auto Shut-off For Cassette Players And Amplifiers

Auto Turn-Off Battery Charger

Automated Traffic Signal Controller

Automatic Dual-Output Display

Automatic Emergency Light

Automatic Emergency Torch

Automatic Heat Detector

Automatic Night Lamp With Morning Alarm

Automatic Room Power Control

Automatic School Bell

Automatic Speed-Controller For Fans and Coolers

Automatic Switch For Audio Power Amplifier

Automatic Telephone Answering Machine

Automatic Temperature Controlled Fan

Automatic-Off Timer For CD Players

Battery Operated High Voltage Source

Bell-Cum Light Controller

Blown Fuse Indicator

Brake Failure Indicator

Capacitance Bridge

Car Anti-Theft Wireless Alarm

CD-ROM Drive As Digital-Audio CD-Player

Cell-Phone-Controlled Audio/Video Mute Switch

Charge Monitor For 12V Rechargeable Lead-Acid Battery

Child's Lamp

Clap Remote

Clap Switch

Clap Switch

Colour Sensor

Computerized Morse Code Generator/Transmitter

Computerized Universal Timer

Condenser Mic Audio Amplifier

Contact less AC Mains Voltage Detector

Cordless Phone Backup

Crystal-Controlled Time-Base Generator

Darkness Controlled Light Switch

Darkroom Timer

DC Motor Control Using A Single Switch

Digital Audio/Video Input Selector

Digital Dice

Digital Dice With Numeric Display

Digital Mains Voltage Indicator

Digital Speedometer

Digital Stop Watch

Digital Switching System

Digital Volume Control

Ding-Dong Bell

Divide-By-N Counter Realization Using ICs CD4033 And CD4017

DTMF Proximity Detector

DTMF Receiver IC MT8870 Tester

Dual-Channel Digital Volume Control

Economical Pump Controller

Electrical Equipment Control Using PC

Electronic Card-Lock System

Electronic Code Lock

Electronic Horn

Electronic Jam

Electronic Motor Starter

Electronic Scoring Game

Electronic Security System

Electronic Watchdog

Extension Phone Switcher

Fastest Finger First Indicator

Fire Alarm

Fire Alarm Using Thermistor

Flashing Beacon

Flashing Brake light

Flashing-Cum-Running Light

Fluid Level Detector

FM Booster

FM Transmitter For Channel Changer

Frequency Measurements Using PC

Friendly Charger for Mobile Phones

Front Door Guard

Fuel Reserve Indicator For Vehicles

Generation Of 1-Sec. Pulses Spaced 5-Sec. Apart

Handy Telephone Receiver

Handy Zener Diode Tester

Hearing Aid

Heat-Sensitive Switch

High and Low Voltage Cutout With Delay and Melody