Arduino - RoboRIO Question

[Qbot2640]

Originally Posted by techhelpbb

Without a circuit diagram it sounds like you are overloading something.
How much current does your circuit input draw when it works correctly?

I haven't measured, but it is only a bunch of LED's and they should be independently powered by the Arduino, which we have plugged into a 12V supply from the new VRM.

Without a circuit diagram, I'll try to explain...eight groups of LED's are wired to the digital pins 6-13 - configured as outputs (anodes) and to ground (cathodes). Red PWM wire to pin 1 (configured as input) and White PWM wire to pin 2 (also input). Black PWM wire to ground.

Program runs only as if there is no voltage on either of the red or white PWM wires...however the robot works perfectly - motor goes forward and reverse exactly as controlled. When we checked the red and white wire voltage with everything connected, the voltage was much lower than the 5V we expected.