If you're on the hunt for the perfect board, then you've probably come across the Uno and Nano. They're two of the most frequently used Arduino variations, but they serve different purposes.

it’s a piece of gear that’s well worth the $30 USD or so it should cost to build your own version. For those worrying that [Faransky] is relying on the PWM functionality of the Arduino Nano to ...

Although a “CommsLink” module providing an RS-232 port was available back in the day, it’s become hard to find, inspiring [James] to design a completely new module based on an Arduino Nano.