For our latest workspace, we decided to skip the boring numbered keypad and build a custom RGB ... to 5v. Connect pins 1, 4, 9, 12, 15, 18, 19, and 22 to ground. Connect pot pin 5 to Arduino ...

If you’d like to get more specific, Michael Klements’ Arduino-based scanner lets you ... along with a 16×2 panel. An optional RGB LED attempts to copy the shade of whatever object you ...