Warm Tube Clock v2 - Nixie Clock with 4 tubes
This is a new and improved version of "Warm Tube Clock" - the open source Nixie clock project.
Important hardware changes between this new version and the previous one are: timekeeping is more accurate and is done by DS3231 (or DS3232) RTC IC, there is no DS18S20 temperature sensor - the internal one of RTC IC is used instead, backup battery is not powering AVR anymore, but only the RTC IC and many more.
Here you can see images, videos and download entire project for DIY version.
[ Source: Trax ]