I made some progress with building my led clock.Â In the video you can see 80 74hc595 shift registers driving 80 7 segment led displays. The bottom row works, but has no data yet to display. You can see: unix timestamp, day of week, weeknumber, date, new earth time, swatch internet time, hexadecimal time, French revolution decimal time, approximate local solar time and local time.
The motherboard is a Arduino Nano with a motion sensor that dims the segments in case no one is in the room. There is also a LDR which controls brightness based on the available surrounding light.
Power is supplied by a second hand 12V 3A HP thin client power supply and switched down to 3.3V by aÂ LM2596 board.
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