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New Circuit Projects

Vehicle Immobilizer Circuit Explained

Last Updated on October 2, 2024 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

5 Simple Water Level Controller Circuits

Last Updated on November 18, 2024 by Swagatam 203 Comments

An automatic water level controller is a device which senses undesired low and high water levels in a tank, and switches a water pump ON or OFF accordingly to maintain an optimal water content in the tank. In this article I have explained 5 simple automatic water level controller circuits which can be used for […]

Filed Under: Water Controller Tagged With: Circuits, Controller, Level, Simple, Water

Make this Simple Buzzer Circuit with Transistor and Piezo

Last Updated on March 9, 2025 by Swagatam 87 Comments

In this article I have explained how to make a very simple circuit for buzzer using piezo electric transducer, two resistors, a small coil and a BC547 transistor. A buzzer is a high frequency oscillator circuit used for generating a buzzing sound through a transducer or speaker output. Simple Buzzer using a Single Transistor Just […]

Filed Under: Audio and Amplifier Projects Tagged With: Buzzer, Piezo, Simple, Transistor

10 Automatic Emergency Light Circuit Diagrams Explain

Last Updated on January 17, 2025 by Swagatam 278 Comments

In this article I have explained 10 simple automatic emergency light circuits using high bright LEDs. This circuit can be used during power failures and outdoors where any other source of power might be unavailable. What’s an Emergency Lamp An emergency light is a circuit which automatically switches ON a battery operated lamp as soon […]

Filed Under: Lamps and Lights Tagged With: Automatic, Diagrams, Emergency, Explain, Light

Automatic Vehicle Headlight Dipper/Dimmer Circuit

Last Updated on November 10, 2024 by Swagatam 56 Comments

AutomaticAutomobileLightDipperCircuitDiagram252CImage

The circuit described here can be built and used in your vehicle for an automatic dipping and dimming operation of the vehicle headlamps, in response to the intense lights coming from an opposite vehicle headlamps. What’s a Dimmer/Dipper in Automobiles An automobile headlight dimmer/dipper is a circuit which automatically switches the headlight intensities of vehicles arriving from […]

Filed Under: Automobile Electronics Tagged With: Automatic, Dimmer, Dipper, Headlight, Vehicle

How to Use LM317 for Making a Variable Power Supply Circuit

Last Updated on November 10, 2024 by Swagatam 170 Comments

IC 317 Power Supply2C Simplest

In this post I will elaborately explain how to build a simple LM317 based adjustable power supply circuit using minimum number of external components. As the name suggests a variable power supply circuit provides the user with a range of linearly varying output voltages through a manually controlled potentiometer rotation. A LM317 is a versatile […]

Filed Under: Power Supply Circuits Tagged With: LM317, Making, Power, Supply, Variable

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