I have an Arduino Mega set up with an 8x8 led matrix as laid out in this circuito.io project: https://www.circuito.io/static/reply/index.html?solutionId=6013e67aeaa9ed0030f668fb&solutionPath=storage.circuito.io
But when I plug in the usb cable, it looks like this:
I'm using the default code supplied by circuito.io (this was just meant to be a "hello world" jumping off point)
When I run the code, some of the leds flicker on and off, but the ones that are on in the image tend to stay on regardless.