Seeeduino Mega 1.23 to 5V power supply

Thank you again Deray.

Are you a fellow user or do you work for Seeedstudio?

When you say “MAYBE” I can use the 5V”“GND”pins, are you sying that you know this for a fact from an engineering standpoint? Or are you just brainstorming?

I do not perceive from your responses that you are familiar with the power section of the Seeeduino Mega 1.23.

I am looking for (A.) an explanation of the functioning of the 1117-5, the LM358 and the MOSFET
and (B) a recommendation where I can tap into that circuit to apply regulated 5V directly to the board, without using the Arduino 0.1" 5V and GND header, nor the USB jack.

Thanks again,
John