I got this idea for a while but I never had the chance to try it out. Friday, a workmate gave me a LCD shield for Arduino and I thought that was the right time to build a clock that comunicate the time through QR-codes. Of course, it's extremely useless (as most of the clocks nowadays). In the video below you can see the clock booting up and loading 3 different qr-codes (3 minutes) Step 2: The software In o ...