Quote Originally Posted by mikebar View Post
The big motor seems to have filter capacitors.
Is this the same motor you referenced in the other thread? I thought you added capacitors?

Actually I DON'T get microprocessor strange behaviour. Simply I do not see incoming pulses into RA.4 (setup as timer0) when the "moving" board get close to the big motor. In that condition microprocessor still work as expected, also still able to send back the error condition by the serial port and also still able to get other commands from his serial port.
I am sure you have but have to ask the obvious. Have you checked or changed the cable and checked the connections to RA.4?