Quote Originally Posted by daliad100
It's switched at 32kHz to make it out of the audible range of hearing.
cheers for that dude. i saw Sabertooth's transistors are switched at ultrasonic speeds (32kHz) for silent operation. i guessed it would be that, im having a fet bridge made up for it so i can run the motors i want to off of that controller. id rather buy a cheap tried and tested controller than wait ages for the software to be written. i guess (not knowing anything electronics) that months of writing go into something like that. i was also told this by the person thats doing my fet bridge. although hes going to give his own a go once ive got my bridge up and running. but i cant expect that to me completed any time soon. he just enjoys the challenge.