OpenSourceNixieTubeShieldDS3231Firmware
OSHW Ardunio Nixie Tube Clock RTC using DS3231 or DS1307
https://hackaday.io/project/18685-nixie-tube-real-time-clock
Nixie Tube Real Time Clock
OSHW Ardunio Nixie Tube Clock RTC using DS3231 or DS1307
https://hackaday.io/project/18685-nixie-tube-real-time-clock
Nixie Tube Real Time Clock