Sorry for the delay. I have been discouraged. The new HPI Sprint R/C car has an ESC-15 that thinks for itself. The HPI manufacturing/sales organization refuses to give me the behavioral specs. This is a STEM educational project. Not a by guess and by golly exercise in inductive reasoning.

One solution is to make an ESC on my solderless proto board. (Complete with cooling fins?)

My PIC (like the R/C receiver) makes appropriate PWM digital signals. The car wheels want appropriate PWM bi-directional current pulses. Have any of you seen a design I could copy?