Nixie Countdown Clock For A 3D Printer

https://youtu.be/v7eYplA41lY

**Update**
Code Fix:
Overall code improvements & annotation
Added exception handling
Added cathode cleaning routine to startup.
Added OctoPrint Version
**Update**

A Nixie Tube Countdown Clock to show how much time is left on your print.
It also displays the bed temp at the end of the print to show when its cool enough to remove it from the bed.

**Warning!!!** This mod uses High Voltage DC which can be dangerous or even fatal.!!
If you make this mod you are doing so at your own risk!

You run your printer using Repetier Server or OctoPrint on a Raspberry Pi, then use a python script to connect to servers API and extract the time remaining of the current print job and then send that via serial to the Arduino that controls the clock.

Parts Needed:
1 x Raspberry Pi running Repetier Server
1 x Arduino Nano 3.0 (ATmega328p 5V 16Mhz)
1 x DS3231: Real-time clock (any I2C RTC will do)
1 x Nixie PSU: High voltage DC Step-Up Power Supply 12v