is that rapid numeric keying is not what this rotary dial numpad keyboard is all about. In fact, it’s actually an April Fool’s prank [Squidgeefish] played on a retro-phone-obsessed coworker ...

It took us almost a decade to get to the moon, and dialling the phone was a lazy affair which ... An Atmega328 was then used to translate the rotary dial mechanics into something more usable ...