Old 11-19-2012, 02:52 PM #1
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Default First PHR-805T Build...



That's a shot of the whole thing in a Radio Shack project box.



I used a driver design I found on the forums here... Heat-sinked LM-317T voltage regulator, 100 ohm potentiometer, 0.3 ohm 1w resistor (was all I had on hand - going to put a higher resistance one in there soon), 47uF capacitor, silicon diode, master on/off, and a momentary switch to fire it. It's powered by a pair of 14550 cells running in series.



For mounting the laser as well as cooling it, I cut an aluminum CPU heat sink in half with my angle grinder and drilled a hole through it. I picked up a tool at Lowes made to let one drill straight holes in wood for inserting dowels with a standard power drill. Then I took some Arctic Silver Ceramique thermal paste and applied it to the module before inserting it into the heat sink.



I'm only running it at about 100mA right now to play it safe, but I figured this is a pretty good test bed moving forward now that I've got a spec that works... so I'll probably try to build something quite a bit smaller next time.


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Old 11-19-2012, 03:09 PM #2
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Default Re: First PHR-805T Build...

Nice build!! Not bad at all.
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Old 11-19-2012, 05:49 PM #3
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Default Re: First PHR-805T Build...

If u skip the pot with a 10.0-11.0 ohm resistor your build will have a much smaller driver board.. For a first build i thinks its quite an extensive effort on your part.. Good luck and welcome to the hobby
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Old 11-20-2012, 12:06 AM #4
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Default Re: First PHR-805T Build...

That's a really good looking first build! You and this hobby will go far.
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Old 11-20-2012, 12:26 AM #5
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Default Re: First PHR-805T Build...

My first build looked like someone ate solder and wires then threw up into a flash light! That's a nice build man!! Great job +1
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Old 11-20-2012, 01:38 AM #6
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Default Re: First PHR-805T Build...

Great looking build there! I can't wait to see what else you build! +1 and welcome to the forum!

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