Hello all, I am a complete Arduino beginner and maybe trying something a bit too difficult too fast, But perseverance will prevail. I have bought an UNO along with a featherwing LED Matrix. The board has a demo that can be downloaded but I am having difficulty getting it to work. (See attachment) …

15x7 Charlieplex Featherwing matrix working on Uno Board

Grumpy_Mike October 10, 2017, 3:47am 4

gdsports:
Featherwings operate at 3.3V but the Uno operates at 5V so these are not compatible.

And that effects compiling code how?

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