CircuitPython is our beginner-oriented flavor of MicroPython - and as the name hints at, That doesn't mean you cant also use it with Arduino IDE! At the Feather M0's heart is an ATSAMD21G18 ARM The Feather M0 E
Learn how to build a Latching Power Switch Circuit (Auto Power Off Circuit), that you can use to power off the ESP32, ESP8266, Arduino, or any microcontroller.