Mesoamerican

Keyboard pyramid

Stacked 225, 144, 81, 30, and 16 key keypads in a pyramid.

• 225 - a 5x5x9
• 144 - a UNQUADQUAD
• 81 - SUDOKO, handwired 9x9 matrix.
• 30 - a keypad I never posted before. It is built from a recycled PCB and 3mm acrylic plates.
• 16 - a single 4x4x4x4x4

I didn't use a 5x5, It looked better with the wide base of the 5x6 keypad.