arduino powered by 3.7 volt battery?

Can an Atmega328 chip +oscillator run off of 3.7 volts without a regulator to be used for 7 channel pulse width modulation with mosfets to drive the leds?

I'm desiring to power it with an 18650 battery. (which charges to 4.2 volts and drains to 2.75 volts)


if not, how could i do it?

frollard6 years ago

It can be done, this person is using some sort of boost converter to provide the full 5 volts for any 5v stuff you may require - but running it of the plain battery should work, with possible unknown consequences to certain communications.
The ATMega328 will run happily from 1.8 to 5.5 V according to the datasheet.