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I made a 7-segment display module that allows you to add any size display to your project with just 2 GPIO! : r/arduino
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Amazon.com: HiLetgo TM1638 8 Bits Digital LED Tube Display Module with 8 LEDs 8 Button keys for AVR Arduino ARM : Industrial & Scientific
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Amazon.com: ALAMSCN LED Display Module TM1637 0.36'' 4-Digit 7 Segment 4 Bits Red Digital Tube for Arduino Driver Board (Pack of 4) : Industrial & Scientific
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