@ronbentley1 Sounds good! Thank you.

@robotbuilder Here is a snapshot of the circuit prior to going to an Arduino Mega. The sketch has a rather large array in it that pushed things almos...

@robotbuilder I am going to be out of town until next week but I will try to post a wiring diagram when I get back. I am using two sets of two cascad...

I shifted to a Mega and the problem went away. 😀 I am not sure what the root cause of the problem was, but everything is now working as it should, ...

I have one capacitor on the VCC and ground where the Arduino connects to the breakout board. I slowly whittling away at this and it looks like the ...