In the case of the Arduino Nano, a mini-B USB cable is required. The power source, on the other hand, can be a powerbank, a phone charger, or even your computer — anything that generates 5V and ...

This is the SB116, an 8-bit programmer’s calculator powered by an Arduino Nano. It features a 128 x 64 pixel monochrome OLED display and can be powered by either a USB port or three AAA batteries.

The 32U4 in arduino-land can sometimes be a bit problematic with regards to firmware updating and reset issues, “brickable” as it were. The Nano footprint is quite nice (similar in size to a ...