Hello Everyone I'm trying to understand the automatic power source selector of the Arduino boards but can't get my head wrapped around it. I've rearranged the circuit and have come up with the schematic below. I understand that IC7B is a opamp used as a comparator to switch the FET (T1) either on o…

Understanding Arduino's Automatic Power Source Selection

system April 27, 2014, 8:04pm 9

@ Raschemmel

You seem to be a few steps ahead of me:

Thanks, but I'm still miles behind Nick Gammon and Nick Pyner.