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.
This device is a simple timer, allowing to keep on the headlights of your vehicle for about 1min. and 30sec.
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 mA.
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.
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 of looking at the tachometer and to be distracted from driving.
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. It will then repeat the procedure.
One-IC two-tones Siren
One-IC two-tones Siren circuit diagram
Economy radar detector
This circuit uses a 1458 dual op-amp to form a police radar detector.
Infra red park assistance. It has three level distance signal LEDs
Wiper Speed Control
Control speed of your wipers