How cool is it to design an Automatic Car Head Lights Turn Off Circuit ? Well, I’ve always fascinated myself playing with car electronics. And today is my day! I’ve come up with a really cool circuit, where you can turn the car headlights “OFF” after a preset time.
This cool circuit is designed using the popular NE 555 IC, and a bunch of associated components. You should be a little careful while testing this circuit actually in a car, where if something goes wrong you’re bound to damage car electronics. I advise you play with a used car, that you’ve nothing much to loose even if you blow up things.
This circuit when setup in a car automatically turns off the head light after a preset time after the ignition switch is turned off.So you can walk out easily from the dark garage in the light of your car.
When the ignition switched on first the voltage from battery is fed to the relay through diode D1.When the ignition switch is turned off it produces a negative going pulse at the pin 2 that triggers the timer. The output of the IC goes high for the time set by R1 .This makes the transistor Q1 to conduct to energize the relay to drive the headlight.After the set time the light goes off.With the value of components used you can make a setting from 10 S to 60 S.
- Assemble the circuit on a good quality PCB or common board.
- Fit the potentiometer on somewhere on the dashboard so that you can easily set the timing.
Circuit Diagram & Parts List.
We have more circuits that may interest you; Take a look: