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Newly Updated Circuit Projects:

Car Head Lamp Fader Circuit (Breathing Effect Generator)

Last Updated on May 16, 2026 by Swagatam 6 Comments

carheadlightmodifiedcircuit

The proposed circuit of a modified car head lamp fader, “breather” circuit generates a slow flashing effect over the head lamps every time the lamps are switched OFF. The “breathing effect” continues for a certain predetermined period after which the process automatically shuts off. The circuit was requested by Mr. Ray. Technical Specifications I just wanted to say that […]

Filed Under: Automobile Electronics Tagged With: Breathing, Effect, Fader, Generator, Head, Lamp

How to Make Car LED Bulb Circuit

Last Updated on May 16, 2026 by Swagatam 8 Comments

car led bulb circuit

Typically all car turn signal lamps are around 12 to 20 watt rated which are traditionally incandescent bulb types and produce much lower light intensities compared to LED lights. Here I have explained how these lamps can be replaced with high efficiency, high intensity car LED bulbs. LED Car Bulb Design The image below shows […]

Filed Under: Automobile Electronics, Lamps and Lights Tagged With: Bulb, LED

Vehicle Speed Limit Alarm Circuit

Last Updated on May 16, 2026 by Swagatam 20 Comments

In our previous articles we have learned comprehensively regarding the ICs LM2907/LM2917 which are fundamentally frequency to voltage converter ICs, and are ideally applicable in all such relevant fields. Here we see how the same chip can be applied for making a vehicle speed limit alarm circuit. Using a Single IC for Speed Detection As […]

Filed Under: Automobile Electronics Tagged With: Alarm, Limit, Speed, Vehicle

Accurate Speedometer Circuit

Last Updated on May 16, 2026 by Swagatam 30 Comments

Speedometer

Here we’ll see how a simple yet accurate analogue speedometer circuit can be constructed at home using just a single IC and a few external passive components. The speedometer can be universally used with all 2-wheeler, 3-wheeler, even in bicycles for indicating their speeds. Using Frequency to Voltage Converter In my previous article I have […]

Filed Under: Automobile Electronics, Meters and Testers Tagged With: Accurate, Speedometer

Multi-spark CDI Circuit

Last Updated on May 16, 2026 by Swagatam 108 Comments

multispark cdi circuit

In this post I have explained an enhanced multi-spark CDI circuit which is universally suited for all types of automobiles. The unit can be built at home and installed in a particular vehicle for achieving greater speed to fuel efficiency. The Circuit Concept The following diagram illustrates an enhanced version of a multi-spark CDI circuit. […]

Filed Under: Automobile Electronics Tagged With: CDI, Multi, spark

Modifying Car Turn Signal Lights, Park-Lights and Side-Marker Lights

Last Updated on May 16, 2026 by Swagatam 53 Comments

modified park lights

In this post I have explained an innovative circuit modification which allows a single common lamp to be used as a parking light, turn signal indicator light, as well as a side marker light on the relevant positions. The idea was requested by Mr. Chris Technical Specifications I have a project that is slightly related […]

Filed Under: Automobile Electronics Tagged With: Lights, Modifying, Park, Side, Signal, Turn

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