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Thread: Analogue tester???

  1. #1
    Join Date
    Jan 2007
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    Default Analogue tester???

    How would you guys like a little battery powered box that will provide adjustable power between 0 and 5 volts for testing analogue lasers? It would have a readout of the absolute voltage.
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  2. #2
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    Default

    I don't know what others do, but we just use a lab power supply with voltage readout..
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  3. #3
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    Default

    That is usually how I do it as well but not everyone can afford to spend $150 or more on a decent power supply. It would be nice if there was just something small that would be able to be taken as diagnostics.
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  4. #4
    Join Date
    Aug 2007
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    Netherlands
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    Default

    Isn't that VERY simple to design/make?

    4x 1,5V AA battery, 5V regulator, some potmeters (RGBVYC + int) and DB-25 output? In a small neat box?

  5. #5
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    Cairns, Australia
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    Default

    The problem with potentiometers is that they arent linear all the way round. Your laser brightness would slowly creep up, and when you hit a certain point on the pot, it would rapidly increase in brightness.

    He also said it would have a readout to tell you what voltage its outputting.

  6. #6
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    Jan 2008
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    Belgium
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    Default

    Err, you can buy pots that are linear and buy ones (usually used for audio) that are logarithmic.

    If you just use the linear ones you should have no problem.

  7. #7
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  8. #8
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    Nov 2008
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    Cleveland Ohio
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    Default Tester

    You need to add a function generator. Most analog lasers don't react the same to a dc signal as an analog signal. You need the function generator to look for problems in blanking.

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