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Newly Updated Circuit Projects:

3-Pin Solid-State Car Turn Indicator Flasher Circuit – Transistorized

Last Updated on May 16, 2026 by Swagatam 6 Comments

car solid state flasher unit

Although, most of the car electronics have evolved into solid-sate versions, a turn indicator flasher unit is one device which still depend on a relay based design in many of the modern cars. Disadvantages of Relay Based Flasher There are a couple major disadvantages of a relay based electromechanical flasher unit: 1) First, these being […]

Filed Under: Automobile Electronics Tagged With: Flasher, Indicator, Solid, State, Transistorized, Turn

Automobile Tester Probe Circuit [Car Fault Finder Probe Circuit]

Last Updated on May 16, 2026 by Swagatam 4 Comments

car electrical fault finder compressed

This simple automotive electrical fault finder probe circuit will enable you to solve most electrical troubleshooting in your cars, tempos, motorcycles etc with a lot of ease and in a hassle free manner. The idea is very simple. The circuit exploits the high impedance gate value of the MOSFET which makes the circuit extremely sensitive […]

Filed Under: Automobile Electronics Tagged With: Automobile, Fault, Finder, Probe, Tester

Converting Wasted Spark Ignition to Sequential Spark, for High Efficiency Combustion

Last Updated on May 16, 2026 by Swagatam 37 Comments

wasted spark 1

In this post I have explained a simple method of converting a wasted spark type ignition system in an automobile, into an enhanced, sequential spark, 6 cylinder engine type ignition system. The idea was requested by Mr. Brenton, as given below: Main Requirements I was looking through the car and motorcycle section but couldn’t find […]

Filed Under: Automobile Electronics Tagged With: Converting, High, Ignition, Sequential, spark, Wasted

Simple E-Bike Circuit [Electric Bike]

Last Updated on May 16, 2026 by Swagatam 25 Comments

thumb press accelerator

This E-bike or electric bike circuit I have explained below can be used as the control circuit for constructing a homemade E-bike, with the help of a permanent magnet motor DC (PMDC motor), and a Li-Ion battery. An electric bike is basically a bicycle powered through a motor and a battery, which does not require […]

Filed Under: Automobile Electronics Tagged With: Bike, Electric, Simple

Windshield Washer Fluid Indicator Circuit

Last Updated on May 16, 2026 by Swagatam 1 Comment

windshield washer fluid indicator circuit

In this article I have explained a permanent indicator of the windshield washer fluid level. Knowing that electronics do not mix well with liquids, instead of using a float gauge system, we have devised a completely different operating principle for you. The operation of our circuit is based on timing the duration of the motor’s […]

Filed Under: Automobile Electronics Tagged With: Fluid, Indicator, Washer, Windshield

Check What’s Behind the Paint of a Used Car

Last Updated on May 16, 2026 by Swagatam Leave a Comment

Laminated iron E core

Some methods to hide a used car’s external deterioration include filling up rust holes, removing collision dents with putty, fiberglass, or epoxy, and painting the car. The outside condition of an automobile is very important to potential used car purchasers due to the high cost of extensive bodywork restoration. Here is a simple circuit concept […]

Filed Under: Automobile Electronics, Sensors and Detectors Tagged With: Behind, Check, Paint, Used

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