I am including an Adafruit Feather on a PCB with a propeller several propellers
Adafruit Feather has two power options
: USB or 3.7v/4.2v, 500mAh LiPoly battery.
I would like a technique for powering the Feather that does not involve stumping a bunch of USB cables and soldering about two inches of wire to the board. Or gluing a battery to the board. I notice in the PCB schematic for the Feather
that the BAT pin is connected directly to the positive terminal for their battery.
My idea: Use a 3.7v or 4.2v regulator to power the Feather via the BAT pin. Include a feedback protection circuit. Maybe a brownout detector holding a transistor closed(current going through), listening to the line and disconnecting the regulator when more than 3.7v is detected?