ComingUp
Aug 27, 2026
Hardware & IoT
electromagnetic relays
hardware project
mechanical computing
puzzle game
retro computing
Gallery
About
Relay Tetris is a playable version of the classic puzzle game constructed entirely from electromagnetic relays rather than a traditional microprocessor. The hardware relies on physical mechanical components to compute the game state and drive the display, resulting in standard gameplay accompanied by the distinctive sound of clicking relays.
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