Had a Sparkfun Pro Micro ATmega32u4 5V/ 16MHz working just dandy, had it wired up to an LED matrix. Uploaded the same code with some minor adjustments, but I accidentally had the 3.3V/8MHz chip option selected in the IDE when I did the upload. Upload completed, display is running twice as fast (mo…

Whoopsied a Pro Micro V/MHz Chip Selection

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