Transistor or relay

Discussion in 'General Electronics Chat' started by vdubin, Sep 4, 2012.

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  1. vdubin

    Thread Starter New Member

    Sep 22, 2009
    Hey guys... I am working on a custom taillight mod. I am replacing the standard bulb in my taillights with LEDs. The problem i have is full brightness to be seen during the day will be blinding at night. I was thinking of using a switching relay and having a resistor on one leg, triggered by the tail light circuit to power the brake light funtion. What i have been looking into is using a transistor setup to try for a solid state system that i can keep out of the weather.

    Any ideas? The load would be quite small 2-3 amps at 12-14v with a 12-14v trigger.
  2. cork_ie

    Active Member

    Oct 8, 2011
    Discussion of automotive modifications are banned under AAC Terms of Service and are likely to get this thread locked. I would also warn you that bulb current measurement is incorporated in most modern cars.

    You can resubmit (or edit) your question in a more non automotive way and get some more general information.
  3. #12


    Nov 30, 2010
    Go to electrotech-online. They allow automotive discussions.
  4. Georacer


    Nov 25, 2009
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