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An LED Ignition Timing Light experiment

Discussion in 'The Garage' started by TwoManyXS1Bs, Jan 29, 2016.

  1. 650Skull

    650Skull Dinosaur Lives Top Contributor

    The mind boggles :bow2:...................Top notch, now go ride you deserve one :bike:
    robinc and TwoManyXS1Bs like this.
  2. TwoManyXS1Bs

    TwoManyXS1Bs BBQ Hunter Top Contributor

    Hey, WER. Since the TCI ignition and Pamco ignition are somewhat similar, I guess I'll go out on a limb, and say that those three circuits in post #50 should work with the Pamco. If not, it would probably take a simple tweak to get it to work.

    And, yes, the power source can be from the ignition power (battery). The choice of circuit would depend on how someone wants to mount the LEDs. If they're grounded, they would need to be powered by circuit #2. If they can be powered down there, then the simpler circuit #3 can be used, as in DogBunny's implementation.

    Edit: Re-reading your question, I get the impression that you're thinking that the LEDs are powered by the alternator's yellow wire? No, the yellow wire was cut from the alternator wiring, and DogBunny repurposed that wire as the grounding wire for his LEDs. They're getting their power from the alternator's powered inner brush...
    Last edited: Jan 23, 2017
  3. TwoManyXS1Bs

    TwoManyXS1Bs BBQ Hunter Top Contributor

    Thanx, Skull.

    I recommend goggles during boggles, not foggles with toggles...:umm:
    robinc and Mailman like this.
  4. Dave14

    Dave14 XS650 New Member

    TwoMany, could you modify your circuit to be used on a Chevy v-8 with a HEI style ignition? I realize this is not bike related, but I have been trying the DIY circuits online with limited success (dim led output). when I came across your thread! I am using a ferrite clamp w/100 turns on #1 plug wire, but I assume this simply doesn't supply enuf juice to properly power an led? I don't know squat about electronics, but it seems your circuitry powers the leds separately? any help would be appreciated. Thanks, Dave
    MaxPete likes this.
  5. MaxPete

    MaxPete Lucille, Betty & Demi - I suggest but THEY decide. XS650.com Supporter Top Contributor

    It is such an interesting and potentially useful device that I’m surprised someone hasn’t marketted such a gizmo.

    ...perhaps a new product line for 2M Industries.....
    Mailman, TwoManyXS1Bs and robinc like this.
  6. TwoManyXS1Bs

    TwoManyXS1Bs BBQ Hunter Top Contributor

    Here's a ready-to-go bolt-on solution, about $50.


    The clamp or wire-wrap on plug wire method supplies only a triggering signal, not enuff power to drive LEDs. They will have to be powered by the vehicle's 12 volt system.

    If you want to pursue a plugwire triggered project, I would suggest either circuit #2 or #3 from post #50.


    Circuit #3 is simpler, but circuit #2 gives a better "snap" control over the LED power. You'd connect your wrapped-wire trigger to the input line marked "TCI". Since the magnitude, and polarity, of the triggering pulse is an unknown, you'll have to experiment with different values of the 10k input resistor (up to 1 meg), different wind counts, and reversal of the trigger wrap...
  7. Dave14

    Dave14 XS650 New Member

    I'm gonna try your design, I got my doubts on the Proform piece. although I like the removable plug-in pickup. I'll let ya'all know if I get it working reliably. thanks 2M. Dave
    TwoManyXS1Bs likes this.
  8. xjwmx

    xjwmx XS650 Guru Top Contributor


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