Love Nick Veys’ clock:
Lumitock is an “LED grid” clock, where the time is represented by the number of lit LEDs within a segment of the clock.
Lumitock is based on the Arduino platform, specifically using an Arduino Pro Mini 328 (socketed, I have commitment issues). It also uses a DS1337C RTC for time-keeping, and TLC5940 LED drivers to keep track of all that light. I used BatchPCB to fab some boards for it, and they turned out great. Very solid, and such an easy service when time isn’t much of a factor.
You can find the source files on github.
2 thoughts on “Lumitock, An Open Source LED Grid Clock”
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That way of showing the time is
a) done on the TiX clock, and
b) patented
It would at the very least be nice to credit the TiX clock folks.