Build an Arduino-powered Binary Clock with Moon Phases
We love clock projects, and the following example by Luís Antonio Silva is one you can not only reproduce yourself in a short period of time - it is genuinely useful and keeps you thinking.
Based around a MAX7219-compatible display unit and an Arduino or compatible board, the time is displayed in binary format with the LEDs - along with the current phase of the moon:
This is a clever way to display the information, keeps you thinking when determining the real time from the binary representation - and fishing enthusiasts will find the moon phase display useful. A quick demonstration is shown in the video below:
Another fun and useful clock you can make yourself - so visit Luís' project page to get started. And if you're interested in making your own version, Tronixlabs can help you with the parts, such as: