Matrix user forums

Greetings, really enjoying Version 8. I thought many folks new to micro's would benefit if you could include warnings in the help sections of IO ports and PWM regarding ungrounded pins. I caught myself trying to blame my flowchart over and over recently only to find my problem was some ungrounded pins. If anyone can't figure out why your flowchart simulates perfectly, but your UNO is acting like nothing more than a paper weight, for goodness sakes ground ALL unused pins (through a 10k resistor of course).

Hi Chet,

Sounds like you've been having some problems. Glad you have them resolved.

However...

for goodness sakes ground ALL unused pins

This shouldn't be required. Unused Arduino pins can be left unconnected and the board should still run fine. Maybe there is something else causing the problems?