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Mains Supply Failure Backup Light

In the event of a sudden blackout at night, this mains supply failure backup light switches on automatically to provide sufficient light for around...

Portable Lamp Flasher

Here is a high power incandescent electric portable lamp flasher. It is basically a dual flasher (alternating blinker) that can handle two separate 230V...

Overspeed Indicator

This speed indicator circuit is designed for indicating over-speed and direction of rotation of the motor used in mini hand tools, water pump motors,...

220V Live Wire Scanner

Presented here is a 220V live wire scanner. The clock input of the IC is connected to a wire, which acts as the sensor....

Telephone Conversation Recorder

This is a circuit for a telephone conversation recorder that can record conversations over the telephone in a tape recorder...

Light Dimmer that Doubles as Voltmeter

Measure AC mains voltage without using a multimeter. All you need to do is to slightly modify the light dimmer fitted at the base...

RGB Bulb Using NE555 Timer

The main objective of this RGB bulb using 555 timer circuit is to produce different light colours with the help of NE555 timer IC...

Garden Solar Light

Many homes come with backyard gardens or open spaces, and adding a garden light can make these areas usable at night. But traditional lighting...

Faraday’s Guitar

Experimenting with the fundamentals of electrical and electronics is always interesting. Presented here is an electronic circuit that demonstrates Faraday’s law of electromagnetic induction...

Bhajan and Mantra Chanting Amplifier

People in India like to chant various mantras as they believe it brings good luck, peace of mind and helps in concentration. Here we...

Infrared Proximity Detector

This infrared proximity detector using an infrared detector can be used in various equipment like automatic door openers and burglar alarms. Check it out...

Auto Reset Proximity Detector

Electrochemical processes taking place in our body generate complex signals (hum) that are continuously being passed along the nerve fibres throughout the body. Any...

Long-Range IR Transmitter

Most of the IR remotes work reliably within a range of 5 metres. The circuit complexity increases if you design a long range IR...

Telephone Receiver

Ever wondered how the old telephones used to work? find out here. This is a circuit for a telephone receiver without a dialling section. It consists of a ringing section and a condenser mic.

Mobile Phone Battery Charger

Mobile phone charger available in the market are quite expensive. The circuit presented here comes as a low cost alternative to charge mobile telephones/battery...

LED Based Reading Lamp

This LED based reading lamp circuit uses ultra-bright white LEDs to provide sufficient light for reading while consuming approximately 3 watts of power. In the case of AC mains failure, the battery backup circuit instantly lights up the LEDs.

Anti Bag Snatching Alarm

Here is a simple anti bag snatching alarm circuit to thwart snatching of your valuables while travelling. The circuit kept in your bag or...

Simple Digital Security System

You can use this simple and reliable digital security system as a watch dog by installing the sensing loops around your building. You have...
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