To deal with the boost convertor, I've raised the BOOST line
TCCR0A = _BV(WGM00) | _BV(WGM01);
PORTD &= ~_BV(PD6); // boost fet off (pull low)
PORTD |= _BV(PD3); // MAX6921 power off (pull high)
TCCR0A = _BV(COM0A1) | _BV(WGM00) | _BV(WGM01);
PORTD &= ~_BV(PD3); // MAX6921 power on (pull low)
jarchie, sorry, been quite busy, so I haven't finished with experimentation.
My current plan is to first try it attached to three AA batteries, to see that I do get a decent output when there's no ripple.
Assuming that works, I then plan to try and ensure super-clean power right next to the module.
I'll update this thread when I've got some kind of result. Thanks for your help so far!
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