- You can set the time of your clock with the ESP SoftAP Provisioning app (can be found both in the App Store and Google Play). The connection procedure should be self explanatory apart from connecting to the ESP32, which you have to do manually since there is no QR code, but the network the ESP generates should start with NixieClock_, the proof of possession code can be left on the default "abcd1234".
- There are prebuilt binaries for the clock available here (including a shell script to flash your ESP32), you can choose the version of the firmware you want to flash by renaming it to 'nixie_clock.bin': https://docs.scintilla.utwente.nl/shock/Nixie%20Clock/prebuilt/v1.0
- The source code can be found here, it can be built with ESP-IDF (at least v5.3), sadly only accessible for active members for now: https://git.scintilla.utwente.nl/shock/nixie_clock
- There is now also a 3D printable holder and case for the 3 kit clock (big thanks to Twan Birnie for making them!), the STL files can be found here: https://docs.scintilla.utwente.nl/shock/Nixie%20Clock/nixie-clock-case.zip

- One last thing; for U6 there is a replacement that comes in the sot-23 package, while the footprint on the PCB is sot-23-5. The chip has to placed in such a way that all pins make contact with a pad.