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Flash tube discharge circuit design

Discussion in 'Electronic Design' started by cybose, Oct 19, 2005.

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  1. cybose

    cybose Guest

  2. mike

    mike Guest

    Go down to your local Walgreens, or anywhere that develops
    single use 35mm camera pix on site. They get 17.5 cents for every camera
    they return to be refurbed. I had no trouble getting them to
    sell me as many as I wanted for 20-cents each.
    It will have everything you need.

    Be very careful
    taking it apart, 'cause the big cap is usually charged
    to lethal voltage. Stated another way, you can die...
    mike

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  3. OBones

    OBones Guest

    Same advice here. I even have the schematics for some of the most
    popular ones if you want.

    lethal voltage yes, but the charge is not that big. It will give you a
    shock but will not kill you if you are in good health. I did take a few
    "strikes" while poking around those things, it hurts, but I'm still
    alive (I think).
     
  4. cybose

    cybose Guest

    The schematics would be a big help. The flash tube I have has a higher
    W-s rating than the ones in disposable cameras.My thinking was, if I
    can figure out what the 'miniature transformer' (don't know what else
    to call it) does I can get one which would work better with the flash
    tube I had...
     
  5. mike

    mike Guest

    What's important is the voltage required. You can get as many
    watt-seconds as you want by paralleling up caps. Just takes longer to
    cycle.
    mike

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  6. Al

    Al Guest

    Are you talking about the trigger transformer or the step up transformer?

    Al
     
  7. mike

    mike Guest

    The above response is IRRESPONSIBLE!!!!!
    Just because you didn't die, doesn't mean that people should be casual
    with a charged cap from a flash. You can die just as easily from the
    head injury you get when the shock knocks you on your ass...except maybe
    if it was protetected because you already had your head up your...

    I've got an eye that doesn't work quite right. I accidentally grabbed
    the second anode cap on a tv that had been off for days. When I flew
    out the back of the set, my shirt caught on the antenna lead. It
    flipped up and scraped across my cornea. The thing that hurts you ain't
    always the primary stupidity.

    mike

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  8. cybose

    cybose Guest

    The step up transformer.
    One of the not-so-cheap flash units had about 750V across its capacitor
    after about 7 seconds, running off 6V DC. What kindoff transformer do
    they use for the stepping up part ?
     
  9. Don Foreman

    Don Foreman Guest

  10. Rich Grise

    Rich Grise Guest

    Call it a "trigger transformer" and you'll probably get more
    google hits. :)

    Good Luck!
    Rich
     
  11. cybose

    cybose Guest

    That was very helpful.
     
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