We are having problems with the PIC controller on one of our classroom robots. We have two 3-wire motors, a bumper switch and an LED plugged into the controller.
The students starting having problems downloading their program to the controller and we noticed the controller smelled hot. We unplugged all the devices and were able to download their program, and we gradually added devices back and it stopped working when the bumper switch was plugged in. The students put on a brand new bumper switch but continued to have intermittent problems downloading their code. They managed to get the online code to download and tested the devices…the bumper switch value changed when the switch was pressed and LED would turn off and on when the digital output checkbox was checked and unchecked, but they were unable to get the motors to run on any motor port using the sliders.
Any ideas?