On Thu, Oct 26, 2006 at 10:04:40AM -0400, Christopher X. Candreva wrote: > > This is a subject that has come up a few times in comp.robotics.misc , along > with solutions for stopping it, that I don't fully remember now.
Ah, thanks Christopher. That was more focused than scouring umpty thousand hits in general google-land. Still, another hundred hits later, I've managed to miss any direct reference to the problem, even with just "pwm vibration". I did find double LC filtering used on the intersil HIP4081A (H-bridge driver) evaluation board, so someone found it useful. I'm tempted to just use the OC1x & /OC1x complementary PWM outputs of the ATtiny26 to drive the series pass element and synchronous rectifier of a buck dc-dc converter, so the motor receives dc, and there's no squeal. Having a tube of 25A relays in the junkbox, I may just take the easy way out on motor reversing. Erik _______________________________________________ AVR-chat mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/avr-chat
