From what i remind 150Hz is less noisy for those motors. And it's also a kind of limitation of the SSPWM as well.
Sure, the noise you hear from your motor is the PWM frequency. Depending the accuracy you need and the OSC you're the maximum PWM frequency should be in the 'yes i can hear that frequency' range 
PicMultiCalc came handy... @8MHZ 30KHz PWM give 9 bit accuracy (well 0-267). Question is... how the motor will react to this... i worry a little bit about the output transistor efficiency already in use for that frequency range. Maybe good enough. Don't remind the whole specs.
Last edited by mister_e; - 25th April 2007 at 17:51.
Steve
It's not a bug, it's a random feature.
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