To help pass the time, [Erich Styger] decided to build a meta digital clock made up of 24 individual analog clocks ... operates from a 5 V USB power bank drawing less than 2 A for the full ...

and sends it speaker tones that encode the text to draw. And as if that wasn’t enough, he’s hacked a quartz driver board from an analog clock to use the display as a clock as well. Let’s ...