Automatic Head Lights Turn Off Circuit

admin April 27, 2011 10 Comments

Car Head Lights Turn Off Circuit

Description

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.

Notes

  • 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.

head light turn off

 

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Comments
  • Rinshad
    April 6, 2017

    Sir the ccircuit is not working

    • jojo
      April 7, 2017

      @ Rinshad – what problem are you facing ?

      • rinshad
        April 17, 2017

        sir..the relay is not switching…can u give the specification for the relay …

  • Anis
    July 13, 2014

    hello. can i ask what kind if switch can be use for S1 and S2?

    • Anis
      July 13, 2014

      i mean what kind of switch can be use for S1 and S2

  • Timothy Gorbunov
    January 4, 2013

    I don’t get how this circuit would work, it seems that s1 does not do anything and from the battery which side is positive and which side is negative

  • June 22, 2012

    I have been reading out some of your articles and it’s clever stuff. I will surely bookmark your site.

  • Shariq
    December 19, 2009

    hello dear friend i want to know about a circuit of Water Motor for automatic off and on option

  • April 22, 2009

    hi guys.is there any value for the relay k1..?
    more details about this circuit and what are the changes do i need to do if the power supply is 24V???
    pls help me with this…thanks

    • admin
      April 24, 2009

      relay can be a 12V, 200 Ohm SPDT relay.

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