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Jenny reloaded is a VFD clock kit based on the beautiful and still well-available IV-11 and IV-15 tubes from Russian production. Thanks to their high brightness and the 22 mm digit size, they are easy to read from daylight even from higher distances.

During this development, many wishes of customers and the experiences of the previous clock "Jenny" were taken into account, for example the through hole design (except of a large coil). However, because of the small size of the clock, it was necessary to design a 4-layer PCB; certainly unique on the Nixie market. Also the latest converter technology with voltage multiplyer was introduced with maximized efficiency and thus low self-heating. Therefore, not only a temperature display could be integrated, but it was also possible to power the clock via USB.
A jack for external time signal receiver and an internal slot for the ASK module are also implemented as a dedicated DST button for fast switching between summer and winter time.
Furthermore the high functionality of the clock in addition with alarm function, night mode, shutdown on weekends or weekdays and the selectable RGB tube lighting will convince you.

You will rget the complete kit with all the necessary electrical and mechanical parts, including tubes and enclosure, to build this piece of jewelery as illustrated on a smooth evening.
USB power supply and time signal receiver are available as options.


  • Hours, Minutes and Seconds display
  • 3 x 2 multiplex for less tube noise and higher brightness; based on the modern Supertex HV driver HV5812
  • Selectable 12 or 24 hour display modes
  • Uses a Quartz Crystal Oscillator as 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
  • Alarm with programmable snooze period
  • Dedicated DST button for easy switching between DST and standard time
  • Super Capacitor backup keeps time during power outages for some hours
  • Simple time setting using two buttons
  • Five programmable IV-15 column settings: (Flashing AM/PM indication, illuminated AM/PM indication, always flashing, always on / off)
  • Seconds can be reset to zero to precisely set the time
  • Programmable night mode - blanked or dimmed display to save tubes life or prevent sleep disturbance
  • Indicator LEDs dim at night mode too to prevent sleep disturbance
  • Weekday aware „Master Blank“ function to turn off all displays on weekends or working hours
  • Separate modes for column IV-15 tubes during night mode
  • Standard or fading display modes as an eye-catcher
  • „Slot Machine“ effect as eye-catcher
  • RGB controller with 729 different possible colours for the LED tubes lighting. Have a different colour of your choice every hour or autochanging colours with variable speed
  • Programmable temperature display in °C or °F at seconds 30...35
  • All user preferences stored in non-volatile memory
  • Inclusive IV-11 and IV-15 VFD tubes
  • Inclusive tubes mounting tool
You will need
  • 3 hours of your evening time with no hurry
  • A clear, well-lit area in which to work
  • Electronic iron and fine electronic solder
  • Multimeter to check the generated voltages
  • Electronic tools
  • A loupe may be helpful
  • TX10 (Torx) Allen screwdriver
  • Enjoyment of your work of course
  • Download of the assembly manual
  • USB power supply 750 mA (offered separately)
Dimensions: 205 x 70 x 73 mm
Weight: 300 g

RFT receivers

NTP receiver
The modern art of time keeping:
Via Internet and a domestic Wi-Fi the time data will be received from a "timeserver-pool", converted into a pseudo GPS format and interpreted by the clock.
  • Easy placement
  • The NTP must be able to connect to a 2,4 GHz Wi-Fi network
  • Only onetime configuration through Laptop / Tab or Mobile Phone with the web browser
  • No software or App installation necessary
  • World time (UTC) is transmitted, which means that the clocks have to be configured once for the corresponding time zone and need to be set between DST and Non-DST twice a year by pressing a button
  • Can be used worldwide


DCF receiver
The proven time keeping method in Germany and neighboring European countries:
From radio station "DCF-77" in Frankfurt/Main, the time signal is continuously transmitted and received within a radius of about 1,000 km. The external DCF receiver forwards the signal to the clock for synchronization.
  • Orientation to the radio station in Mainflingen near Frankfurt is necessary
  • Unfortunately interference-prone 77.5 kHz long-wave transmission, therefore reliable synchronization only at night hours
  • During synchronization the Nixie tubes should be switched off (can be set-up in the options menu of the clocks)
  • Central European Time (CET) is transmitted with automatic switching between DST and Non-DST
  • Can be used in Germany and the neighboring European countries


Wireless GPS
The wireless way of time keeping, specially with multiple clocks:
The data sent by the GPS satellite system is received (similar to the car's navigation system) and converted into a 433 MHz signal, then transmitted intermittently and received from an internal fitted ASK module.
  • Placement the Wireless transmitter on a window frame with a clear view to the horizont is required
  • Wall outlet for powering the Wireless transmitter necessary
  • 433 MHz signal strenght up to 20 m indoor
  • Every clock must be equipped with an internal ASK module
  • One Wireless transmitter can be received by any number of clocks
  • World time (UTC) is transmitted, which means that the clocks have to be configured once for the corresponding time zone and need to be set between DST and Non-DST twice a year by pressing a button
  • Can be used worldwide, but specially intended for Export, therefore the manual is only available in english speech
These wireless components consist of the following devices
1.: A wireless GPS receiver with USB power supply for placement on a window frame.
2.: An ASK module for fitting into the clock.

If you want to use Wireless GPS synchronization for the first time, we recommend to order a Wireless Set 3 as all necessary components are already included. Later, to expand to every new clock, you only need an internal ASK module.


Look at RFT Receivers
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