low level laser driver

Discussion in 'The Projects Forum' started by lotusmoon, Jun 30, 2013.

  1. lotusmoon

    Thread Starter Member

    Jun 14, 2013
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    I was wondering whether it is a big job to make a driver for a 200mw laser diode?
     
  2. bertus

    Administrator

    Apr 5, 2008
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    Last edited: Jun 30, 2013
  3. Shagas

    Active Member

    May 13, 2013
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    Thx for the info bertus , been looking for the first link
     
  4. lotusmoon

    Thread Starter Member

    Jun 14, 2013
    203
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    thank you for this I had always thought that low level lasers were not dangerous
     
  5. electrimvolts

    New Member

    Jul 7, 2013
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    1
    if i remember right you can make a circuit using a lm 317, a couple resistors, a cap or two, a power source of some sort that will be driving the laser diode circuit, i may be leaving a thing or two but for the most part depending on how technical you are wanting to get with it i think that's about all you need to build a circuit to drive the laser diode w/o burning it out.
     
  6. wayneh

    Expert

    Sep 9, 2010
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    It does not have to be a big job. You need a constant current power supply capable of reaching about 9V (I think, but the max voltage may depend on the specifications of your laser). If you look for that search term, you'll find many circuits based on the LM317 IC.

    If you need great precision or accuracy, the project can become more complex but if you just want to light it up, it's definitely a DIY project.

    Safety first. Pay attention to the warnings and the handling advice.
     
  7. wayneh

    Expert

    Sep 9, 2010
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    I got curious and read up on the safety aspects of a laser this powerful, and I now believe this thread should be considered for closing due to the risks to the OP.
     
  8. lotusmoon

    Thread Starter Member

    Jun 14, 2013
    203
    4
    I have also read up on the safety aspects of lasers and am not going forward with using one. Thanks
     
  9. Shagas

    Active Member

    May 13, 2013
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    Yeah , 200mw is already quite alot .
    I use a pair of professional filter glasses when playing with lasers >20mw
     
  10. wayneh

    Expert

    Sep 9, 2010
    12,103
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    Wise choice - thanks for sharing it. So often we see posters here leave in a huff because we suggested they might be endangering themselves. Since we never hear from them again, it makes one wonder how things turned out. :(
     
  11. lotusmoon

    Thread Starter Member

    Jun 14, 2013
    203
    4
    for me it was not so much for myself, what if a child picked it up or a friend and started playing with it. What's an OP?
     
  12. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    The OP is the Original Poster, the person who started the topic.
    I often say TS , Topic Starter.

    Bertus
     
  13. lotusmoon

    Thread Starter Member

    Jun 14, 2013
    203
    4
    yes i thought i might be me
     
  14. Shagas

    Active Member

    May 13, 2013
    802
    74
    Powerfull hand held good quality lasers almost always have key-locks on them so only you can activate them
     
  15. IC-Man

    New Member

    Jan 3, 2012
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