XL 7-segments Digital Clock/Thermometer
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Arduino Nano + DS3231(ZS-042) + 30xAPA104-LED-Strip based digital clock/thermometer
The numbers are 195mm (7.8") height, so that one digit fits right into most Printers,
the HH:MM Version is 580mm (23") wide.
The clock is modularized, it is easy possible to just create a HH:MM:SS version configurable in the code.
There are 3 case parts: the last digit + cap(1x), a normal digit connectable to the next right(3x or 5x), and a dot-case(1 or 2x).
Additionaly are 4 types diffusor-inlets: A (top/bottom), B (upleft/downright), C(upright/downleft) and D(center) and one for the dots.
The last digit case contains space for the two boards (Arduino Nano and ZS-042)
As strip can be used all WS2811, APA104 or Neopixel kinds. I would prefer the 3-wire solutions, since soldering 30(or 46) interlinks is awefull lot of work.
The digit cases can be screwed against a large beam with M3 screws directly driven in the back to give everything a better strength.
Wiring Instructions:
1. Internally the line in the digits follow the pattern:
-2-
1 3
-0-
6 4
-5-
so just connecting the arduino gnd, +5V and DI of the beginning of the strip and go from 0 in the smallest (far right) digit up through the whole clock. Just 3 wires through all the digits in the number.
Hint: soldering the ~6cm bridges between all 7 digits of a number, add a longer triple to the end, fiddling the wires through the holes, solder them together and finally stick the led-strip-parts inside…
