Arduino test projects Docs Arduino IDE 2 blink example LED matrix example Sunfounder kit guides 3 LED matrix https://learn.sunfounder.com/lesson-12-dot-matrix-led-display/ Matrix editor https://xantorohara.github.io/led-matrix-editor 5 LED matrix quad 2 x 4 x 8x8 LEDs 2 blocks of 4 8x8 matrices One block daisy chained to the first Separate USB power supply for matrices Make sure ground of USB is connected to ground of arduino too 6 Protogen v1 Designs https://xantorohara.github.io/led-matrix-editor/#077ffffefcf0c000|0000ff7f3f1f0700|0000000000000000|00c0f88c01000000|0001e7ff04000000|0000030f3ee00000|01031e0000000000|0007fcf0e0000000|0000ff0703000000