Can I force Arduino Not to be powered by USB? – arduino.stackexchange.com 11:11 Posted by Unknown No Comments I'm building a 3D printer and I'm using a Atmega2560 + RAMPS board. The whole thing is powered by an ATX PSU (12v for motors and stuff, 5v for the Arduino), but when I plug in my USB cable, I can't ... from Hot Questions - Stack Exchange OnStackOverflow via Blogspot Share this Unknown
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