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BTW - i'm slowly learning this micro controller programming stuff. So far, I've gotten an LED on the STK500 to dim and brighten using PWM!
I'm curious how fine of a PWM resolution i'll need. For example, if I increment the duty cycle by 1, will the current jump by .3 amps or 30 amps? The knob on the 555 timer was very sensitive once there was constant current in the output loop. If high resolution isn't needed, then the PWM can be run at a higher frequency.
So, i think my next test will somehow rig a couple knobs to change duty cycle. maybe one will have a macro effect to get the charger going. The 2nd knob would increment the duty cycle by only 1 or 2. I could test at a high resolution and see what happens and possibly extract that to lower resolutions. i haven't really worked out the details yet...
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