All necessary electronics parts (excluding Nixie tubes and power adapter) and a microcontroller with pre-programmed an application software. We advise you to use the new (New old stock - NOS) Nixie tubes.
Power Supply DC 12V, 1A. With 5.5 x 2.1 mm end plug, center positive. You may have similar power adapter in your house because such type power adapters are popular and widely use.
12 or 24 hour operation modes. Simple time setting using three buttons. Standard and scrollback display modes. "Slot Machine" Cathode poisoning prevention routine.Programmable Blue LED tube lighting. Auto increase of adjusting value for quick time setting. Neon colon indicators blinking at 1 Hz.
Tubes are driven in high frequency dynamical indication and provide service for many years. All settings are stored in non-volatile memory. Time accuracy (+/- 1 second per month) is provided by built-in RTC (Real Time Clock) based on extremely precise DS3231 module with temperature compensation and backup with CR2032 battery. Not AC frequency dependent - works in all countries.