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Thread: Duty Cycle

  1. #1
    Join Date
    Apr 2010
    Location
    Grand Rapids, Mi
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    2,495

    Default Duty Cycle

    Has anyone ever calculated the average "on" time percentage for a diode during an average laser show, also taking into account the analog factor with "on" not always being a full on 5V.

    Trying to figure out some heat dissipation issues and want to take in account that my continuous duty test rig right now isn't real world.

    I suppose i'll run a full show and take thermals before an after, but am curious if this has already been done.
    leading in trailing technology

  2. #2
    Join Date
    Mar 2010
    Location
    Raleigh, NC
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    2,248

    Default

    No way to calculate something when it is different for every situation. But usually at least 2 of the 3 colors are on. So, I'd go with at least >66%.

  3. #3
    Join Date
    Nov 2007
    Location
    CA
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    16

    Default

    There was a test run about 7 years ago by tocket where he extracted the duty cycle and average pulse width over the course of a random show. An fb3 was used so there is always some internal blanking, other dacs would most likely yield different results. I do not recall the data dealing with the variable of the laser gain.

    Post about duty cycle:
    http://www.photonlexicon.com/forums/...998#post126998

    Post about average pulse width:
    http://www.photonlexicon.com/forums/...155#post127155

  4. #4
    Join Date
    Apr 2010
    Location
    Grand Rapids, Mi
    Posts
    2,495

    Default

    Thanks very interesting read.

    Quote Originally Posted by dazebtwn View Post
    There was a test run about 7 years ago by tocket where he extracted the duty cycle and average pulse width over the course of a random show. An fb3 was used so there is always some internal blanking, other dacs would most likely yield different results. I do not recall the data dealing with the variable of the laser gain.

    Post about duty cycle:
    http://www.photonlexicon.com/forums/...998#post126998

    Post about average pulse width:
    http://www.photonlexicon.com/forums/...155#post127155
    leading in trailing technology

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