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Automobile Electronics

Car Tank Water Sensor Circuit

Last Updated on May 22, 2026 by Swagatam 36 Comments

car2Btank

In this article I have explained a simple car tank water sensor alarm circuit using IC 555 and a pulsating signal on the sensing probes to pevent corrosion on the probes. The idea was requested by Mr. Peter. Circuit Objectives and Requirements The Design Referring to the figure below, the proposed car tank water sensor […]

Filed Under: Automobile Electronics, Water Controller Tagged With: Sensor, Tank, Water

Bicycle Dynamo Battery Charger Circuit

Last Updated on May 17, 2026 by Swagatam 34 Comments

dynamobatterychargercircuit

In this post I have explained a simple constant current bicycle dynamo battery charger circuit which can be used for charging a Li-Ion or Ni-Cd battery from a bicycle dynamo electricity source. The idea was requested by Mr. Saif Khan. Technical Specifications I want to charge a battery through a dynamo fitted to a cycle. […]

Filed Under: Automobile Electronics, Battery Charger Circuits Tagged With: Battery, Bicycle, Charger, Dynamo

Battery Charger for Positive Earth Cars

Last Updated on May 17, 2026 by Swagatam 4 Comments

positive battery charger circuit

The post presents an 6v or 12v battery charger circuit for positive earth cars which could be used for upgrading 6V positive earth cars, facilitating an external 12V battery to be used in them along with the existing 6V battery with a common positive earth body. The idea was requested by Mr. Joe Ceretti. 6V […]

Filed Under: Automobile Electronics, Battery Charger Circuits Tagged With: Battery, Cars, Charger, Earth, Positive

Make this EV Battery Charger Circuit

Last Updated on May 17, 2026 by Swagatam Leave a Comment

In this post I will explain how to build and test a homemade yet very professional looking high power EV battery charger transmitter circuit using H-bridge fixed-frequency AC inverter topology, driving a series-resonant LC tank. I will also explain how to build a complementing EV charger receiver circuit for receiving the charging current from the […]

Filed Under: Automobile Electronics, Battery Charger Circuits Tagged With: Battery, Charger, EV

How to Make Powerful Car Headlights Using LEDs

Last Updated on May 16, 2026 by Swagatam 17 Comments

4 pin LED

In this post we see how to build an enhanced and efficient car headlight lamp using Pirhana LEDs. A car LED headlight is a powerful lamp built using high efficiency LED arrays, which creates extremely powerful headlight lamp for the car, along with a very high efficiency in terms power consumption. Using 4-pin Pirhana LEDs […]

Filed Under: Automobile Electronics Tagged With: Headlights, LEDs, Powerful

Simple Ignition Code Lock Circuit for Automobile Protection

Last Updated on May 16, 2026 by Swagatam 15 Comments

codeswitch 1

This extremely simple code lock switch circuit can be used for locking a vehicle’s ignition by typing a hidden code over the given micro switch keypads. So now you can use this simple code lock ignition circuit for probably securing your car from a possible theft. Alternatively the circuit may be used for any application […]

Filed Under: Automobile Electronics Tagged With: Automobile, Code, Ignition, Lock, Protection, Simple

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