I'm working on an Arduino design that uses a separate 5V power supply for peripherals. During development the Arduino is powered by USB and isolated from the other supply by a jumper, but when development is done it will be powered by the external supply, too (via the jumper).
What would happen if I forgot to take the jumper off and both the USB and the externsl supply were connected to the 5V rail simultaneously? Assume they're within .25V of each other.
What would happen if I forgot to take the jumper off and both the USB and the externsl supply were connected to the 5V rail simultaneously? Assume they're within .25V of each other.
