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Thread: Projector wiring for GM20's?

  1. #1
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    Default Projector wiring for GM20's?

    It looks like I'll be using a GM20 as the safety shutter device for my upcoming RGB projector (planning in progress!).

    To trigger this with a TTL signal or the "shutter" signal from a Pangolin FB3 board, is any additional circuitry required, and if so, could someone provide an example?

    Thanks!
    RR

    Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
    1979.
    Sweet.....

  2. #2
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    Default

    You will require a driver circuit. Something built around a TDA2040 would be the ticket..
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  3. #3
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    Does anyone know the operating voltage range and current draw of the GM20?
    RR

    Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
    1979.
    Sweet.....

  4. #4
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    791

    Default gm20

    http://www.laserfx.com/Backstage.Las...Pinouts32.html

    as far as voltage a 9v battery will move the coil nicely so i would say this is just my best guess that it will use about 5v -10v +/- peak to peak

    if you give me a Chance to find it i think i have the schematic for the lasermedia driver i think its an 8ch amp but you could always just strip it down to one
    Last edited by VJ AIWAZ; 08-20-2007 at 06:06.

  5. #5
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    Since I'm still in the planning stages, any and all recommendations are appreciated!

    For my initial use, I think all I'll need is a basic fixed-input driver circuit that will deflect the GM20 with a TTL (shutter) input signal.
    All I'll need is is enough "On - Off" movement to use the GM20 as a beam shutter.

    So, if anyone has a proven circuit for that purpose, a copy would be appreciated!
    Last edited by Stuka; 08-20-2007 at 21:26.
    RR

    Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
    1979.
    Sweet.....

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