So you would like to have your own fancy business card with an OLED display that can run games? The Electrocard is just the project to give you an idea how to pull it off. This PCB Business Card can run simple games like Tetris. You are going to need an ATtiny85 microcontroller, 1 x SSD1306 OLED module, and a CR 2032 coin cell battery.
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Michael Teeuw has shared more information about this project here.
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