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Old 18th November 2012, 08:15 PM   #8511
Doug R is offline Doug R  United States
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Salas,
Not sure I will get the re-tracing done today, but here are some photos.
Not the prettiest job, I know.
Thank you SO much.
Doug
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File Type: jpg Topside.jpg (19.6 KB, 116 views)
File Type: jpg Underside.jpg (22.0 KB, 112 views)
File Type: jpg Heatsinks.jpg (11.6 KB, 113 views)
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Old 19th November 2012, 06:46 AM   #8512
RCruz is online now RCruz  Switzerland
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Nice heatsinks

What material did you use to insulate the power mosfets ?
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Old 19th November 2012, 09:27 AM   #8513
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Nice heatsinks

What material did you use to insulate the power mosfets ?
I bet it's an insulator
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Old 19th November 2012, 09:47 AM   #8514
Doug R is offline Doug R  United States
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I used Mica and thermal grease. Is that a no-no?

Doug
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Old 19th November 2012, 09:50 AM   #8515
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Just curious....

It seems ok for me.
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Old 19th November 2012, 10:21 AM   #8516
Salas is online now Salas  Greece
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Salas,
Not sure I will get the re-tracing done today, but here are some photos.
Not the prettiest job, I know.
Thank you SO much.
Doug
The frontal sinks could be saved for normal circa 200mA CCS I guess. So to simplify. But it must work first so to evaluate temps. If you will do a continuity test between CCS Mosfet tab and sink screw, is there any continuity by mistake maybe? I will try to spy with my little eye the pics for connections also.
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Old 19th November 2012, 11:35 AM   #8517
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Salas,
Not sure I will get the re-tracing done today, but here are some photos.
Not the prettiest job, I know.
Thank you SO much.
Doug
It may be a good idea to remove the circuit board in/below the 4 'ventilation' shafts of the heatsinks, probably just a bit larger (the hole) than the actual shaft size.
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Old 19th November 2012, 12:14 PM   #8518
Doug R is offline Doug R  United States
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FdW: I don't understand.
Salas: Definitely no continuity to heatsinks.

All:

I will go now and check all the traces.
Do the orientations of the three leggie things look right?

Thanks
Doug
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Old 19th November 2012, 12:17 PM   #8519
Doug R is offline Doug R  United States
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Also, Salas, when I hooked up the raw supply to the reg, I connected the raw ground to Force negative. That is right isn't it?

Also, the ground is floating, i.e. not connected to earth, since it is on a breadboard.

Doug
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Old 19th November 2012, 12:47 PM   #8520
Doug R is offline Doug R  United States
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Hey Guys,
I am sure I switched the drain and source when I wired the MOSFETS.
Going to change them now.

Doug
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