Quote Originally Posted by dragons_fire View Post
could be from the PWM, im using a serial motor driver, to keep things simple.. so i cant "easily" change the freq. its not the "hearing" noise im worried about, its the static (snow) on the tv. im just worried that it may affect my circuit since the motors are only going to be an inch from the board..
The noise showing up on the tv shouldn't affect the motors (ever noticed when you run a blender in the kitchen that the tv in the living room goes nuts?).
Can you 'scope the PWM to the motors or put a meter with a freq reading on it?
Any reason why you're using serial motor drivers? Other than it's already done and one less thing to worry about...which is handy...
And I just thought of something. You said the gear ratio is something like 298:1. All that noise is probably just regular motor noise. How do the motors sound on straight DC battery type power?

Which reminds me...where did you get the tracks? I've been wanting to build another R/C lawnmower and want to drive it with tracks instead of tires...