The major component, in addition to Arduino board is the LED light bar. The LED Bar is a prepackaged strip of 3 high-output LEDs powered by 12VDC. Each unit comes with a fully assembled and tested PCB ...

He only ever lights up one LED at a time, but he scans through the 128 LED’s so fast that persistence of vision prevents you from noticing. To the human eye, it looks like multiple LED’s are ...