I have a project that needs power.
I have a project that needs power. It has both a 328P and an ATtiny85 on it. I have two choices of wall wart here. I can use an old cell phone charger that has a good 5.3V output or I can use an old 12V and regulate it with a 7805. I don't want to use up all that energy in a regulator if I don't have to. Are there any tricks to dropping a little bit of that voltage from the 5.3V to get it under 5V? Maybe a series diode or two? Or would it be safe to just feed the project 5.3V?