I have a bunch of tubes (NL-8422's and IN-12's) I haven't been able to test yet. I'm working on a new ultra-thin 8-tube nixie clock and calendar based off of CNLohr's tube driver design, but replacing the CH32V003 with an ESP32S2-MINI-2. Having come into this project as a complete electronics newbie, I'm not sure if my circuit will work properly and I haven't yet finalized my program. So while I'm working on this, and preparing to test my drivers in a single-tube setup, I'd like to test out my tubes to see if they're all in good working order in the meantime. What do you all recommend as good setups for testing my tubes? I'm looking for something low-cost, yet still reliable and easy to use so I can test each numeral on the tubes.
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