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PWM and Frequency Controller (for lasers and diodes)
How to make a Burning 1-2W 445nm Blue Laser
Thanks for that, I can see the (very) small allen screw, what my concern was that there is a bit of an air gap between the laser unit and the heatsink unit, I suppose I'd thought for heat loss efficiency that the fit would be a lot more snug and that it would not just rely on an allen screw keeping it in place.
If you have your diode module it should fit inside that heatsink and lock in with a set screw which is provided with that specific item.
Cheers for the quick reply. My main worry was firmly mounting the LED into the listed heatsink.See dub dub dub ebay dot com/itm/Inner-diameter-13mm-Cooling-Heatsink-Heat-Sink-for-Laser-Diode-Module-/261026175391?pt=LH_DefaultDomain_0&hash=item3cc65f599fObviously I am stuck in working out how to lock the led into this heatsink. I need a couple? of steel / alloy rings with threads so I can lock the led in somehow. Not knowing what such a thing is called, it may be a slow process. So if anyone has any bright ideas/suppliers I'd appreciate it. Meantime, Mr Google beckons,
The spring that sits between the diode and the lens provides tension so that the lens doesn't move around too much (closer or farther from the laser diode). The amount you screw the lens in is up to you because it determines how the laser is being focused.I believe the actual diodes themselves are just press fit inside a housing meant for the specific diode standard, maybe they add thermal glue? As for a larger outer heatsink they generally have a set screw that clamps the diode's housing in place.Those two have a combined voltage of 7.4v so that should work fine with the circuit.
I have a question on this build if you have time to answer.I bought all the suggested parts but have assembly issues. Presumably on the laser diode, I remove the supplied (plastic ?) screw in collimating lens from the diode unit and replace with the glass one, but how tight should it be screwed down? On the unit there is a small spring that pushes against the lens part, then the supplied lens is screwed down. How tightly should the 1x 445nm Collimating Lens : Found Here be fixed? Keep the spring or not?Secondly. How does anyone get the laser unit to stay in the heatsink? anyone have a fix, or a supplier of screw / washers that will hold the unit in the suggested diode heatsink?Thirdly, could I power this with 2 x 3.7v 1000mah series Lipos for portability to move around the shed / workbench? Thanks in adv for any tips. RB
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