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Thread: Opnext HL6545MG Diodes

  1. #111
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    Marconi,
    You build 1 Watt greens?

    Too bad a 1 Watt red is not possible

    Maybe a DPSS red is do-able Pump at =>808 and get 650 out

  2. #112
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    Hi!

    The peltiers work with a maximum voltage of 1,9 VDC and a current of 3A. I will design together with frank from laserblog a new TEC controler only for cooling diodes. No heating. And the operating voltage of the controller will be 5 VDC. So I will design it that you can connect 2 of those peltiers!

    here is the ebay link:

    http://cgi.ebay.de/2-Stck-Peltier-El...QQcmdZViewItem

    Best regards
    Karl

  3. #113
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    Quote Originally Posted by steve-o View Post
    Marconi,
    You build 1 Watt greens?

    Too bad a 1 Watt red is not possible

    Maybe a DPSS red is do-able Pump at =>808 and get 650 out
    Hehe, No .. I am modding one for a friend that was a TTL unit.
    Its not a conventional circuit to start with either.. so Its taking me a while without reinventing the wheel on this one.

    Sorry, I dont make any green ones anymore..however, I have been thinking about it again, dunno, I think that market is covered well.
    Last nite I got over 900mW of red..of course if I add two more diodes to the mix..one watt would be easy.


    Starburst:
    Cool, I hope that with a Qmax of 4watts is enough for you., with the size of the mounts I dont think you have anything to worry about.

    Im using a single DT6-4L http://www.marlow.com/Products/produ...p?ProductID=55
    It has a Qmax of 20w..I have quite a few of these so I should use them,
    Im just gunna tickle it a little with the Hytek HY-5600 controller IC , I can series the peltiers up to 20v if I want.
    But I am only using a 12v supply for the TEC at the moment. I may change it to 5volts as the peltier only needs 6volts .
    I have a current limit of 2amps right now and if I need more I can parallel another controller for 4amps. Or, I can add a driver FET at the output for more amps. But at 2 amps I can freeze the diodes now , hehe.

    When I run out of these chips I will use the LM-324 single-ended FET design , its easy and small.
    Last edited by marconi; 04-11-2007 at 14:53.
    "My signature has been taken, so Insert another here"
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    *^_^* aka PhiloUHF

  4. #114
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    Last nite I got over 900mW of red..of course if I add two more diodes to the mix..one watt would be easy.
    How many diodes are in the mix now? 4?

  5. #115
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    Yep, four 250's but Im only running them at 200 for maximum life
    "My signature has been taken, so Insert another here"
    http://repairfaq.ece.drexel.edu/sam/laserfaq.htm
    *^_^* aka PhiloUHF

  6. #116
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    Hi!

    Yes, i tried a few other peltier elements. But this was the largest for those mounts i use. I when I put the maximum current through the elements, the mounts get really cold. I think this is good enough.

    Marconi, where do you get those diodes? Maybe when the setup is finished, I upgrade to 4x 250 mW instead of 4x 180 mW.

    Karl

  7. #117
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    Quote Originally Posted by Starburst View Post
    Marconi, where do you get those diodes?
    And that would be Mystery Number One on the forum right now.
    I think it's a secret, but I'll settle for one question answered if possible. Are they single mode or some rare narrow stripe multimode diode? And a possible second answer, as I beleive in pushing my luck: is their 250 mW rating a full CW rating, and do they have a pulse rating?
    I don't know if I can deduce much from answers to those questions, but they are the best questions I can figure out to ask, if the direct question is a no-go.

  8. #118
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    Trying to get Marconi's secret recipe eh, you-all?

  9. #119
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    Hell yeah! Fire burn and cauldron bubble!
    I'll be working with my Rohm diodes though, for good or ill. Got to use what I've got...

  10. #120
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    hehe good luck

    How are the Rohm's going Doc?

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