Electromechanical Relay Nixie tube digital clock prototype with accurate time
Electromechanical Relay nixie clock with IN-1 nixies with 3D printed unobtanium sockets. 4.194304 MHz Quartz crystal oscillator and 4521 frequency divider provide accurate 1 Hz pulse. In the future pulse will be generated by OCXO with possible accuracy +\- 1 second per 3 years.
In my application, there is no need for rubidium frequency standard as second hand units from eBay are already aged and with 24/7 run would soon bring problem with jitter. Also energy consumption would be an issue for just a clock as it runs 24/7. Pulses are counted by 4017 decade logic.
I use transistor SPDT switch of my design to set time. Still this build have few issues I have to resolve before I put it on PCB's.
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