Hi, I am using a RF radio nRF24L01 with a ATmega328 and the RF24 library. I have an issue where when the ATMega328 runs off of battery power 6.0v or via a buck converter (5.7v) the radio does not work (does not send or receive). When I connect power via a USB RS232RL, the radio works. The power to the radio supplied by the USB is 4.7v. So I am leaning towards a power issue. So I connected the battery source with a potentiometer connected to the Radio and reduced the voltage to 4.8v and the radio does not work.
All the other functions work when powered by the buck converter, battery and USB RS232TL. For example, I have 2 GP2Y0A21YK0F Sharp IR Analog Distance Sensors connected and they work.
Any ideas as to what could cause this issue? I understand I have not posted any schematic at this point, but I was looking for some help to point me in the right direction.