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Thread: What's the news on DVD burner diodes?

  1. #11
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    that is correct
    Eat Sleep Lase Repeat

  2. #12
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    Quote Originally Posted by andy_con View Post
    that is correct
    what do you usually use to isolate it?
    -Josh

  3. #13
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    I use mica washers and the kind of plastic inserts used to mount power transistors and voltage regulators.

  4. #14
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    Quote Originally Posted by thesk8nmidget View Post
    quick question on the red open cans.

    these are case positive right? so you have to isolate the heat sink from the rest of your projector?

    if so what is the best way of doing this?
    Most guys on the freak forum use TEC/peltier.

    I have done the same with a Heat conductive rubber/foil type meterial.
    Its used to attach OPAMPS to heatsinks.

    Its non conductive (electricity) but is thermal conductive

  5. #15
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    yeah some plastic or wood.

    but as above a tec would be even better and you will probably get better life out the diode
    Eat Sleep Lase Repeat

  6. #16
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    sweet i need to start building my reds
    -Josh

  7. #17
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    Quote Originally Posted by thesk8nmidget View Post
    what do you usually use to isolate it?
    I ordered small sheets of mica from McMaster Carr and I put that under my laser modules. You can cut it with scissors and drill it. There is more modern stuff you can use but I don't have a source for it.

  8. #18
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    I found the rubber stuf...

    try to google on GAP filler (t-global makes it)
    Farnell sells the stuf

    http://nl.farnell.com/jsp/search/res...=1001222&No=25

    • Thermal gap fillers from 1.5 W/m K to 4.8 W/m K with and without PSA adhesive.
    • Soft materials highly compressible, easy to assemble, and provide good electrical insulation.
    • Shock and vibration absorber
    • Typically used on electrical components, : IC, CPU and MOS, and connection between boards to enclosure walls to help heat conduction
    • Typical applications include heat dissipation from LEDs, motherboards, power supplies, LCD TVs, notebooks, hubs, hand sets, memory modules, hard drives

  9. #19
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    Thanks. I will swap out the fragile mica with that stuff. I like the idea of the type with the adhesive.

  10. #20
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    I found that my CNI's driver was interfering with my other laser, so I just used a peice of mica on the uninsulated transistor. Still conducts the heat, but is not electrically conductive. If the laser itself generates some heat, a TEC can cool it for you, + its plates are made of ceramic, so its electrically isolated.

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