Hi, I have an Arduino Nano and a nRF24L01+ 2.4GHz RF chip that works with 3.3volt, its a KAP (Kite Aerial Photography) project so it must be as light as possible. For testing and prototyping I used the nano plugged to the usb port, but now I will use a 9v battery. But i have read that if you don't…

5 volt voltage regulator to Arduino Nano USB

system May 9, 2014, 8:26pm 7

But in 2.4G NRF24L01+PA+LNA specs says:
Transmit mode current (peak):115mA

So is better to use an external power

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