“Quite Rubbish” is the maker’s assessment, not ours. We thought this was fantastic. This is a clock built with the Raspberry Pi. It works, but it’s not readable by humans: instead, you find out the time by scanning the QR code it outputs with your phone.
Stewart Russell knocked this together not because he wanted to know what time it was (just as well, really), but because he was interested in trying to get the Pi to interface with an old surplus Nokia LCD display via SPI. If you want to have a go at something similar yourself, Stewart has all the code, wiring and parts lists you need at his blog. These little LCD displays are very inexpensive and aren’t hard to find; if Stewart’s QR clock has given you an idea for another LCD project, please let us know in the comments!
(Thanks to Recantha for the spot!)