So I made a standalone circuit for a night light that fades through the visible spectrum with an RGB LED. When I plug in the power leads into the 3.3 or 5V and ground on my arduino uno, it works perfectly. I want to power it from three 1.5V button cells for a total of 4.5V. When I attach the power…

Atmega 328P power source supply problem

system October 17, 2012, 8:41am 2

I should clarify that I am using an Atmega 328P with arduino uno bootloader installed, and a 16Mhz crystal.

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