This is a simple LED driver circuit using two 555s and a pair of NPN/PNP transistors to drive several LEDs meant to outline a small sign. Designed with my son for a St Patrick's Day project, in KiCAD.

About Sure, here's a concise summary: The 8x8x8 LED Cube is a decorative piece controlled by an Arduino Uno, capable of displaying various light patterns. It uses a 93dn8wy (SN74HC595N) IC, PN2222A ...