 Dome light dimmer for Cars
This unique circuit makes your dome light look cool. Usually when the car door is closed, the dome light just goes OFF. With this circuit, you can have our dome light fade slowly in brightness and finally go OFF. This slow dimming of the light gives a very good feeling at night. It looks very romantic
Police Siren
This circuit produces a sound similar to the police siren.
It makes use of two 555 timer ICs used as astable multivibrators. The frequency is controlled by the pin 5 of the IC.
Car anti theft wireless alarm
This FM radio-controlled anti- theft alarm can be used with any vehicle having 6- to 12-volt DC supply system.
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.
Headlights Timer
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.
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 of looking at the tachometer and to be distracted from driving.
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. 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.
Park-Aid
Infra red park assistance. It has three level distance signal LEDs
Wiper Speed Control
Control speed of your wipers
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