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Old 03-28-2014, 09:58 AM   #20 (permalink)
mechman600
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Quote:
Originally Posted by P-hack View Post
7/8ths is plenty good. But if it is still bugging you, driving a mosfet with the opto might get you the low resistance it needs for fsd.
I tried this with a 2N7000, but I could not make it work for the life of me. It either stayed switched on (no matter what PMW value) or if I switched resistors to different spots (like a 5K from the 2N7000's gate to ground), my test LED switched on when PWM was 1 but the current did not increase as I turned it up.
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