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    Atmega16 pin not outputting 5V

    Hi, I'm new to microcontrollers and I'm trying to build this 4x4 LED cube, controlled by an Atmega16: https://www.instructables.com/id/LED-Cube-4x4x4/ I've completed the circuit as shown in the tutorial and am testing the output pins before I put together the rest of the cube. When I set the...