Project designed for 6 IN-12 Nixie tubes [hours : minutes : seconds]. 

For that clock You will need one MCU boards NCM107 and one Tubes board NCT412

PCB design, schematic, housing and software made by GRA & AFCH

Kit includes MCU (microcontroller unit) ATmega328p flashed with Arduino Uno Bootloader and sketch (Firmware)

Kit is compatible with Arduino Uno, so it allows you to write your own unique programs on the Arduino platform, 

the latest sources are always available on github at the "NixeClock" repository.

Listing contains:

• MCU NCM109 Control Board bare PCB
• NCT412 Tubes Board bare PCB
• Set of Parts and Components (electronic, mechanical)
• IN-12 Nixie Tubes -  6 pcs (optional, choose in selector)
• NE2H Neons (for Dots) - 4 pcs
• Clear Acrylic Stand (included, free of charge)
  
• Power Supply (12V, 1A) (US, EU, UK, AU) (optional, choose in selector)
• Temperature sensor () (optional, choose in selector)
• User Manual on Vintage-style paper
• Principal Electrical Schemes for PCBs (MCU NCM109, NCT412)
• BOM Lists for PCBs (MCU NCM109, NCT412)

Software Features:

• Clock support many kinds of Nixie tubes (6 tubes [hh:mm:ss] format and 4 tubes [hh:mm]). How to make a clock on 4 tubes? You need to cut the board, see the video below.
• 12/24 hour format.
• Slote Machine (Ani poisoning)
• Date format: DD:MM:YY
• Unique RGB LEDs backlight with 16,7 millions colors.
• Very easy to switch LEDS off/on.
• As alarm sound clock uses standard RTTTL (Nokia format) melodies, so You can easy change it. (included songs: mission impossible, we wish you).
• Easy updating firmware via USB using Arduino IDE.
• Software based on Arduino sketch, so MCU has Arduino bootloader within.
• Power On Self Test (POST): LEDs test, tubes test, input voltage test, sound test.

Hardware Features:

• Integrated High Voltage Power supply 150 – 220V.
• ICSP connector for flashing Arduino Bootloader to blank MCU.
• 3 PWM channels for RGB LEDs 8 bit per channel = 24bit = 16,7 millions colors. It can be disabled in the menu (see manual).
• Test points for testing, adjust and control low and high voltage circuits.
• Pads for internal buttons and terminals for external buttons.
• Pads for internal USB connector and terminals for external USB.
• Terminals for internal and external power connector.
• Terminals for external and internal buzzer.
• 2 dots column with separate controls upper and lower dots.
• Power consumption: 11-14V, 360mA (Recommended power source: voltage 12V, current 1-2A).
• MCU board NCM107 has world smallest size: 100mmx50mm.
• Tubes board NCT412 size: 180mmx50mm.