I have a Pro Mini, with an 8 pin dip switch wired onto pins 2-9. 10k resistor from each pin to ground, and the other side of the dip switch is 5v.
But.... it's reading some of the pins as high? If I short the offending pin to ground ,it goes away.
4k7 pull downs don't help, and I didn't really want to go right down to 1k pull downs, as that seems excessive. Especially if all the dip switches were operated.
Any ideas what would cause this? (Supply is a very smooth 5v)