Nixie Countdown Clock For A 3D Printer

thingiverse

A Nixie Tube Countdown Clock displays remaining print time and bed temperature on your printer. **Warning: High Voltage DC can be deadly!** If you attempt this mod, you assume all risk! To create this clock, connect a Raspberry Pi running Repetier Server to an Arduino Nano 3.0 via serial connection. Extract print job data using Python script connected to Repetier Servers API and send it to the Arduino. Parts needed: 1 x Raspberry Pi with 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 to 180v) 1 x LM7805: Linear Voltage regulator 6 x IN-12A: Nixie Tubes 66 x IN-12A Pins (or sockets for manual wiring) 2 x K155ID1: Nixie Drivers 3 x MPSA42 NPN: High voltage transistors 3 x MPSA92 PNP: High voltage transistors 6 x 3.3K ohm Resistors 3 x 470K ohm Resistors 3 x 100K ohm Resistors 3 x 15K ohm Resistors 4 x Orange 5mm LEDs 4 x 6.8K ohm resistors for the LEDs 30 x Single Line Dupont Headers 23 x Long Dupont Cables (dependent on clock distance from motherboard) 5 x M5 Bolts 10mm Flat Headed 4 x M3 Bolts 25mm 2 x M2 Bolts 20mm Create PCBs or design them yourself using the provided gerber files. Refer to Motherboard Components.txt for assembly information. Mounting STLs are included for aluminium extrusion frames like the AM8. Edit updateclock.py Python script: Change serial port to match your system (usually /dev/ttyUSB0) Replace YOUR_PRINTER_NAME and YOUR_API_KEY on lines 76 & 101 Your API key can be found/generated under "Global Settings -> Connectivity" in the Repetier Server web interface. TODO: Clean up code and add exception handling Add cathode cleaning routine at clock startup