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For your car electronic circuits

In this circuit diagrams category you can find speed meter, courtesy light, siren horns, etc.

Automatic Headlight Brightness Switch

This simple circuit can be wired into your headlight switch to provide automatic switching between high and low beam headlights when there is oncoming traffic.... [read]

Car Alarm Arming Horn Beep Canceller

This circuit serves to silence the arming beep yet maintain the alarm by introducing a small delay into the signal. It sits between the alarm and horn relay.... [read]

Car Battery Charger

This charger will quickly and easily charge most any lead acid battery. The charger delivers full current until the current drawn by the battery falls to 150... [read]

Economy radar detector

This circuit uses a 1458 dual op-amp to form a police radar detector.... [read]

Headlight Flasher

The circuit is based on the 555 timer. It is used in the astable mode. The 555 timer output will go high for an adjustable period of time and then turn off.... [read]

Headlights Timer

This device is a simple timer, allowing to keep on the headlights of your vehicle for about 1min. and 30sec.... [read]

One-IC two-tones Siren

One-IC two-tones Siren circuit diagram... [read]


Infra red park assistance. It has three level distance signal LEDs... [read]

Speed-limit Alert

This circuit has been designed to alert the vehicle driver that he has reached the maximum fixed speed limit (i.e. in a motorway). It eliminates the necessity... [read]

Wiper Speed Control

Control speed of your wipers... [read]