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Archives for 2011

Vehicle Immobilizer Circuit Explained

Last Updated on May 16, 2026 by Swagatam 9 Comments

CarImmobilzer

If you own a car and still haven’t incorporated any security system in it or perhaps your old security system is out of order, you can quickly opt for a cheap yet effective security option for your car or any vehicle by installing the proposed circuit. It will cost you not more than a dollar. […]

Filed Under: Automobile Electronics Tagged With: Explained, Immobilizer, Vehicle

Simple Car Burglar Alarm Circuit

Last Updated on May 16, 2026 by Swagatam 6 Comments

Learn how to build a simple car burglar alarm circuit right in your home. The circuit is built around a few trivial components and yet proves to be totally fool proof with the security of car accessory to which it has been integrated. You certainly won’t like waking up just to see your car audio […]

Filed Under: Automobile Electronics, Security and Alarm Tagged With: Alarm, Burglar, Simple

How to Make a Bicycle Horn Circuit with Ringtone

Last Updated on May 16, 2026 by Swagatam 17 Comments

inductor

A bicycle horn is normally used in bicycles for generating an amplified alarm sound with a press of a button for alerting anybody getting on the path of the running bicycle. In this post I have explained the complete construction of an electronic bicycle horn circuit which will resemble a phone musical ringtone sound. Introduction […]

Filed Under: Automobile Electronics Tagged With: Bicycle, Horn, Ringtone

High Power 250 Watt MOSFET DJ Amplifier Circuit

Last Updated on May 15, 2026 by Swagatam 96 Comments

IMG

The powerful DJ MOSFET amplifier circuit design provided in this article is reasonably easy to build and will produce a thumping 250 watts of music into a 4 ohm loudspeaker. Use of HEXFETs at the output ensures monstrous current and voltage amplification. The involvement of MOSFETs or rather HEXFETs at the output stage of this […]

Filed Under: Audio and Amplifier Projects Tagged With: 250, DJ, High, MOSFET, Power, Watt

Real Machine Gun Sound Effect Generator Circuit

Last Updated on May 15, 2026 by Swagatam 26 Comments

1 12

Video Demonstration An impressive little machine gun sound effect generator circuit is discussed here. Once built can be integrated with any audio amplifier to experience a roaring bullet studded war like simulation. A small hobby project which can be tried by all electronic enthusiasts will generate interesting machine gun sound effect over the connected loudspeaker, […]

Filed Under: Audio and Amplifier Projects Tagged With: Effect, Generator, Machine, Real, Sound

Simple Bird Sound Generator Circuit

Last Updated on May 15, 2026 by Swagatam 23 Comments

SimpleBirdSoundGeneratorCircuitDiagram

The diagram presented below shows a simple circuit of a bird chirping sound generator. All the parts are very common and the transformer is an ordinary type as found in small transistor radios at the output stage Circuit Operation The circuit is basically a feedback oscillator circuit that is configured around a small output transformer. The transistor forms the […]

Filed Under: Audio and Amplifier Projects Tagged With: Bird, Generator, Simple, Sound

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