For a breadboard Arduino, I just want to wire up the power conductors of a USB cable directly to the ATMEGA328P. Is that OK to do? The dropout voltage of a 7805 regulator is like 2V, and I don't have any other regulators on hand. Do I need to add any capacitors to smooth out the voltage from the typ…

is a USB charger OK to use as power source - w/o regulators?

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