Old 12-02-2010, 08:15 PM #1
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Default low side current source

I want to make a laser using one of the 40mw 635 diodes but they use the case as LD+. I did not want to go through the trouble of isolation so I came up with idea and lab tested it. Seems to work great and it will let me short LD+ to batt+. What do you guys think?


Note the TO-220 and TO-92 packages have different pin outs

IDiode = 1.25/R




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Last edited by midias; 12-02-2010 at 09:44 PM.
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