I am working on a project which has atmega328p and HM-11 bluetooth module. Bluetooth module requires 3.3 volts and likewise atmega328p also requires constant voltage for proper functioning, am I right ?
So, my power supply will be either 3.7 volts one cell Li-po battery or 3-4 AA size 1.5 volts batteries connected in series.
I believe I need some electronics to sustain the constant voltage, since the voltage of the batteries won't stay at the same level as it drains.
I think I need a boost converter and a switching one for efficiency. However, I am not very familiar with that concepts and powering an AVR through batteries.
Appreciate if you can inform me further with suggestions.