Vehicle Interior Lighting With Switch-Off Delay


Posted on Feb 7, 2014

Nowadays, a switch-off delay for the vehicle interior lighting is a naturally a standard feature. However, with certain models having only spartanttings, or older-model vehicles, you`re left sitting in the dark as soon as you climb in and close the door. That calls for an aftermarket accessory! The author built this circuit using normal` compo


Vehicle Interior Lighting With Switch-Off Delay
Click here to download the full size of the above Circuit.

nents (with leads), but in the SMD manner, which meanstting the components on the copper side. The only holes drilled in the circuit board were the fourxing holes, and the entire assembly wasrmly attached to the surface of the heatsink for power transistor T3 (the author used a finned heat sink rated at 7. 2 °C/W). The heatsink is at ground potential. A value of 1 was used for R3 with satisfactory operation of the darlington. The light goes on when the door is opened. After the door is closed, it continues to illuminate the interior of the car at full brightness for around 30 seconds, after which it slowly dims. Approximately 1 minute after the door is closed, the quiescent current drops to zero.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    LASER Transmitter/Receiver
    Half-wave rectifier
    Basic-function-generator
    Flame-monitor
    Remote control using telephone
    high current mosfet toggle switch
    on off relay circuit automatic
    an advanced web server with a microcrontroller
    Installation of IFD in Kenwood TM455
    Voltage-controlled oscillator
    SING AROUND COUNTER CONTROL
    Breaker control signal circuit manually



    Top