If I have a custom board that has the Atmega32u4 using the Leonardo bootloader and I want to convert from 5V to 3.3V I believe I just modify the USB circuitry so it is no longer on the same power supply as the micro. Someone I was talking to mentioned that the crystal will have to be dropped from 16…

Atmega32u4 from 5V to 3.3V

system November 17, 2012, 10:40pm 2

Yes, it works.

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