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EPROM eraser- light on indicator?

Discussion in 'Misc Electronics' started by Impmon, Nov 1, 2006.

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  1. Impmon

    Impmon Guest

    Is there a safe way to tell if the EPROM bulb (emits UV-C ray) is on?
    Since it's not safe to look at the bulb, I need to know if the bulb is
    on or if it's burned out while erasing EPROMs. So is there a simple
    UV-C detector circuit or something? Never seen a commercial EPROM
    eraser as I built mine out of 12" fluorescent lamp, long cardboard box
    (sealed when in use), and a 12" germicide bulb.

    I wanted to know if it's on and working beside waiting 15 min or so
    and finding out none of the EPROM are erased.
  2. jasen

    jasen Guest

    "day-glo" flourescent paint, highlighter, (etc) glows brightly under UV.

    I have some yellow cable-ties that were manufactured with flourescent die
    in them, they glow brightly under even a blue LED.
    if the box is sealed there'll be no light inside it with the bulb off,
    use any sort of light detector.
  3. Just use a perspex/plexi/polycarb/glass rod through a small hole in the case. The material will
    block the shortwave UV.
  4. Baron

    Baron Guest

    Most clear LED will show some output from UV. Or file the top off a
    TO18 transistor !
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