Hmmmm....I tried the code. It compiled, but did not give the desired results.
The scroll starts, but locks up. Also, the adding LEDs do not work.
I know this like comparing apples to VW beetles, but I have attached the sketch am working on, and a sketch that works. Only trouble is, the working sketch is for the MAX7219 chips.
I am hoping someone else can see what I can't. I'm starting to get crosseyed.
FullHelmet7219.ino (11.8 KB)
Mini_Range_Finder.ino (5.29 KB)