Leon USB powered Nixie clock kit complete with ST-12C Nixie Tubes and enclosure

Leon is Mr.Nixie’s fourth creation of a Nixie clock series starting with the IN-2 "Laura", IN-17 "Lars" and
IN-12/17 "Lena" Nixie clocks. Based on the past experiences of hundreds of sold kits and the wishes from
our customers, the software was radically re-written and is now backed with a lot of new features.
Also an „ultra cool“ HV converter design was introduced, which minimizes the heat created by the
inductor / switching transistor to a maximum of only 30°C. This results in highest efficiency > 90%
and the possibility to power the clock from a single USB power source.
In the same way the EMI noise was dramatically reduced.
The electronics of Leon is packed into a very flamboyant OEM aluminium enclosure from the
design-series "Chac" of Fischerelektronik in Lüdenscheid / Germany.
An optional glas desktop stand from König & Meyer, which fits into the 3/8" threat on bottom is available.


Features List

  • Hours, Minutes and Seconds display
  • 3 x 2 multiplex for less tube noise and higher brightness; based on a modern Supertex HV driver
  • Selectable 12 or 24 hour display modes
  • Uses a Quartz Crystal Oscillator as the timebase with software adjustable accuracy
  • Programmable leading zero blanking
  • Date display in either DD.MM.YY or MM.DD.YY or YY.MM.DD format
  • Programmable date display each minute or selectable with a single button push
  • Scrolling display during fading-in the date or standard display change
  • Alarm with programmable snooze period
  • Optional DCF / WWVB / MSF / GPS sync. with status LED; prepared for fitting internal the ASK receiver module from the „Wireless GPS connection“
  • Dedicated DST button for easy switching between DST and standard time
  • Super Capacitor backup keeps time during power outages for more than 24 hours.
  • Simple time setting using two buttons
  • Five programmable column neons settings (Flashing AM/PM indication, illuminated AM/PM indication, always flashing, always on, always off)
  • Seconds can be reset to zero to precisely the set time
  • Programmable night mode - blanked or dimmed display to save tubes life or prevent sleep disturbance
  • Weekday aware „Master Blank“ function to turn off all displays on weekends or during working hours
  • Separate modes for column neons during night mode
  • Standard, fading or fading + scrollback display modes as an eye-catcher
  • „Slot Machine“ cathode poisoning prevention routine, disabled during night mode, selectable time
  • Programmable RGB tube lighting – select your favourite colour palette
  • 729 colours possible. Have a different colour with selectable brightness of your choice every hour or autochanging colours with variable speed
  • High efficiency „ultra cool“ HV converter, power consumption less than 2.5 VA even when RGB lighting is fully turned on
  • Powered from a single Mini USB outlet (from your PC, MP3- or a cellphone charger)
  • All user preferences stored in non-volatile memory


Fully inclusive kit

You'll get everything you need including tested NOS ST-12C Nixie tubes from Bharat Electronics Ltd. and enclosure to build the clock as shown on the picture.
All tiny SMT parts on the boards are just pre-assembled and soldered so assembling the complete clock within 2 hrs. is not a problem at all.

However, you need very good soldering and mechanical skills and a quality electronic solder station
with a fine tip (1 mm maximum) and fine solder wire to assemble the clock.

This means also, that these kits are not for electronic beginners.
Beware also from the internal produced 170VDC Anode drive high voltage.

All the components which are included in the kit incl. SMT pre-assembled main board
You need only to fit the through hole components.

Download the Assembly Manual
Download the Owners Manual

Technical Data

Dimensions (w x h x d): 197 x 63 x 117 mm (h = 120 mm with glas desktop stand)
Weight: 640 gr (920 gr with glas desktop stand)

Power Supply: 5VDC 450mA max. from USB supply

1/8" TRS input for:
External optional RTF receiver (DCF/WWVB or MSF)
External optional Micro GPS wired receiver
External antenna pigtail (when ASK receiver module internal fitted) for Wireless GPS Connection Set 3

Optional glass Desktop stand from König & Meyer

Leon complete Nixie Clock kit with enclosure and tubes
Power Supply
Optionale Funkempfänger *
Optional RTF Receivers *
Please don't forget to add the additional shipping costs for deliveries outside Germany

Ihr Warenkorb
Your basket
* Alle Funkempfänger sind incl. 2,5 m Anschlusskabel (außer das ASK-Modul und das Wireless GPS Set 3)
Set 3 besteht aus 1 x Drahtloses GPS-Sende-Modul, USB Netzteil mit EU Netzadapter für den Drahtlos-Sender, Internes ASK Empfängermodul für den Einbau in die Nixieuhr

* All RTF Receivers includes a 2.5 m TRS connection cable (except the ASK-module and the Wireless GPS Set 3)
Set 3 includes: 1 x Wireless Transmitter Module, USB Power Supply with US mains adapter for Transmitter module, Internal ASK Receiver Module for fitting inside the Nixie clock

What is the Wireless GPS Set 3 ?

Import duties, taxes and charges are not included in the item price or shipping charges.
These charges are the buyer's responsibility

Die angegebenen Preise sind Bruttopreise incl. MwSt. und zzgl. im Warenkorb genannte Versandkosten.

Noch Fragen / Any questions: Mr.Nixie@Nixiekits.eu