“Use your Arduino Nano or Particle Photon board and build Binary Nixie Clock with 18 x IN-2 nixie tubes. By connecting DHT22 sensor it is also possible to build binary thermometer and hygrometer.

LogikClock Arduino clock software for voltmeter clock build. This code is for driving an Arduino board, in my particular case a Arduino Nano. The hardware associated with this code for my use is: ...