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Triggerable Strobe Light Circuit Help

Discussion in 'Electronic Design' started by Finite, Sep 20, 2007.

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  1. Finite

    Finite Guest

    I created a strobe light circuit that I can trigger from a PIC 18F4550
    USB interface I created.

    I can only manage to get this strobe to flash at a rate of about 2 per
    second. I am wondering if someone can take a look at the circuit and
    pose some suggestions as to ways to speed up the repeat time. I would
    like to see this unit firing at about 20 per second max.

    the circuit can be found here:

  2. Phil Allison

    Phil Allison Guest

  3. Winfield

    Winfield Guest

    The SCR trigger current (0.34mA) is about 20 to 30x
    too low, at least for common SCRs I'm familiar with.
    You could try changing R3 to 33k.

    As for a faster repetition rate, you could reduce R1,
    which limits the flash-capacitor C1 charging current.
    You can also increase C2 to insure fully charging C1.

    But watch out, for an optimal 340V and 22uF, E = 0.5 CV^2
    = 1.3J, which means 20 flashes a second could be 25 watts
    of power going someplace, multiple places. Only a little
    of the energy will be converted to light.
  4. mpm

    mpm Guest

    I agree. I would suspect the SCR as well.
    And I must admit, the C106 is by far NOT my favorite part, even though
    they are pretty common.
    There are better choices out there....

    And obviously, make sure your power supply is keeping up and that you
    have a good flashtube.
    Good luck. -mpm
  5. Phil Allison

    Phil Allison Guest

    "Winfield = grade # 1 Pommy **** "

    ** Go read the fucking spec for the * four decade* old C106 series

    You ASININE geriatric ASD fucked pommy **** !!

    ........ Phil
  6. Phil Allison

    Phil Allison Guest


    ** Cock sucker....


    ..... Phil
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