After long day working, the nixie clock is made by Arduino UNO and other simple modules. I tried to make design as simple as possible to everyone can make it.
Basically, Arduino UNO will get real time from DS3231 module then show to nixie tube via opto isolation chip.
The circuit will be put in MDF wood case which is cut by laser cnc machine. After finish, everything looks perfect as a product. See detail process how to make it
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Part list:
1. Arduino UNO (1set) https://amzn.to/2P58O7s

2. Real time clock module DS3231 https://amzn.to/2SIyEzI

3. DC step-up module 12VDC to 150VDC (1set) https://amzn.to/30kpdK9

4. Nixie tube (6pcs) https://amzn.to/3aHyJvX

5. Isolation chip TLP627-4 (4pcs) https://amzn.to/2wiN0PG

6. Resistor 10K https://amzn.to/3bmySnM

7. Header pin https://amzn.to/2QFcr5q

8. Breadboard cable https://amzn.to/3ae8vk0

9. Power supply module 220VAC/12VDC (1pc) https://amzn.to/39dqNk2

10. Button (2pcs) https://amzn.to/2UIoXCH

11. MDF wood 3mm thickness (laser cut) https://amzn.to/33Q4LTz

12.White glue (for MDF wood) https://amzn.to/2WKo7YJ

13. Permanent magnetic plate https://amzn.to/2QGfDxX

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Circuit design, Arduino code, MDF design case
https://bit.ly/3ab6PHL