The keypad uses an onboard ATMega328P to scan the matrix for button presses, decode them, and send them via UART or I²C to an Arduino. [ELECTRONOOBS] has the PCB files available via Patreon for ...

The LEDs are set up in a 8×16 matrix to create the familiar Tetris playfield. Buttons and a joystick are then installed on the front panel to allow the player to control the action. An Arduino ...