Controller Stepper motor position via AccelStepper Library, microdriver, and arduino uno.
Uno has 5 inputs via buttons/pull-down resistor circuit with a corresponding step position.
Had a 12v power supply attached to Uno, inputs went haywire with any proximity to the circuit.
Originally had 100KOhm pull-down resistor for each input, upped to 1M then 10M no change.
Stepped down to a 9v power supply, keeping the 10M pull-down resistors and the problem is mostly resolved, but I still get interference.
Anyone encounter this problem? Solution?