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PWM + ISP Simultaneously
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Re: PWM + ISP Simultaneously

by stinkbutt on Wed Nov 24, 2010 2:03 pm

I suppose you could try to increase the base resistor on the BJT. If it's an ordinary 3906/3904 it'll have a gain of no less than 40x, so just figure out how much current you need to draw on your motor, divide it by 40, and that's the minimum current you'll need to draw on the base of the transistor, which in turn defines the maximum resistor at the base.

Frankly, I don't really understand why the presence of a BJT transistor is mucking up the programming, but whatever it's doing increasing the resistance might help there.
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Please be positive and constructive with your questions and comments.