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Anyone do LED vehicle lighting?

Discussion in 'The Lounge' started by newyorkin, Oct 3, 2006.

  1. newyorkin

    newyorkin 1 ton status

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    I lost a bulb in a rear turn signal on the bike, so I'm working on a circuit to replace it with LED's, and integrate running and brake lights.

    What's the normal process for this? Are there premade leds on an 1156 base? Anyone know where I might find some?
    So far I bought a few hundred ultra bright leds on ebay and am building a pc board to mount them in and mount in the lens cap. I'm game for an easier way, though...
     
  2. dremu

    dremu Officious Thread Derailer Premium Member

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    Yep, you can get LED "bulbs" in most any size these days.

    A quick googling found, for instance:

    http://www.customdynamics.com/motorcycle_led_bulbs.htm

    That said, DIY'ing it is fun ... you know about the whole forward voltage drop thing for LED's and how to calculate current limitng resistors, series a few and parallel those in batches?

    -- A
     
  3. newyorkin

    newyorkin 1 ton status

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    Yeah, somewhat... Figuring out the drop on the leds is a bit of a PITA, but I'm figuring if I send 12v into a 470 ohm resistor on each led (three for the brake/signal), I will illuminate and still limit current.

    I can't remember how to calculate voltage drop, though. So pushing 12v over 470ohms, in bench testing lights the 2.7v led, but I don't know the actual voltage drop. 12v into 3 parallel resistors is going to produce a different drop also.
     
  4. newyorkin

    newyorkin 1 ton status

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    Ouch!! I just saw the prices on those 1156 base leds... Yah, home brew is how I'm gonna go...
     
  5. POWERMAD

    POWERMAD 1/2 ton status

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    My shop has the LED 1156 & 1157 bulbs. I think I paid $5 ea for two 1157 ones.
    I believe they have 13 LED's each and fit in the same space as a normal 1157 bulb.
    They are alot brighter than the old filiment types too.
    I can get a part # if ya want it, we have amber and red ones.

    Nevermind I looked that link and those are not the type you are looking for.
     

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