I am making a standalone battery powered arduino project which uses nRF24L01+ for radio communication. nRF draws 20 mA current max. Can I use 3xAA cells along with 2 diodes (which drop 0.6*2 = 1.2 V) to get 3.3 V source for my nRF module?
I will be keeping my microcontroller and nRF module in sleep mode most of the time. All it has to do is to wake up after a certain interval of time (maybe 2 to 5 seconds), communicate to a central radio server and go back to sleep.