[John] utilises the Arduino pro micro for its copious analog inputs and USB functionality. A nice feature of this board is that it’s based on the ATMega32U4, which can quickly implement USB ...

USB-C versus USB Micro connectors ... of the ATMEGA32U4 processor, but having the newer connector should at least make cabling more accessible. This is one of the most practical Arduino clones ...

It's like a shrunken version of the Arduino Leonardo as it features the same ATmega32U4 microcontroller, micro-USB port, and pinouts. It also operates at 5V and requires an external supply of 7 to ...