I put an arduino on a PCB board and after some power saving techniques like going to sleep, and 3.3v, 8Mhz, etc, I was able to bring down my power draw to 2.5-3.0 mA from 4 AA cells in series. I have an NRF24l01 connected to it and tried to use the NRF power saving techniques, but still drew 2.5mA.…

Trying to turn on pro mini 5v with transistor

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