4 digits ILC4-5/7 VFD Clock with 2 Alarms. Newly designed!

Key features:

  • Unique slim VFD Clock on the market !
  • Based on ILC4-5/7 VDF tube specially designed for clock
  • Four 21mm high digits (ILC4-5/7 clock VFD Tubes)
  • Displays Time , Date and 2 Alarm clock sets
  • Accurate & calibrated time clock source from internal crystal
  • Integrated 2 Alarm Clocks
  • Easy control with only 2 buttons
  • Uses standard 9V or 12V wall plug Power Supply
  • Precision Seconds setup
  • Internal battery for power failure protection
  • Will generate alarm buzz even main power is off !!!
  • Internal buzzer for Alarm1 and Alarm2
  • Alarm1 trigger output
  • High efficiency integrated DC-DC converter

2 Main Modes: Display Mode and Setup mode

Display mode:
In the display Mode Clock indicates the following information:

Time (Hours & Minutes) in format HH:MM, with flashing colon
where HH is Hours (00-12 or 00-23), MM is Minutes (0-59)
Time (Minutes & Seconds) in format MM:SS, with solid colon
where MM is Minutes (0-59), SS is Seconds (00-59)
Alarm1 in format HH MM, colon is on
where HH is Hours (00-12 or 00-23), MM is Minutes (0-59)
Alarm2 in format HH MM, colon is on
where HH is Hours (00-12 or 00-23), MM is Minutes (0-59)
Date in format : DD.MM,
where DD is day (1-31), MM is Month(1-12)
Date/Time with 10 seconds interval in format :
Day.Month (solid dot) or Hours.Minutes (blinking dot)
Blank/SerialPort in format :
Display is blank, all digits off, when no data send to Clock
NN NN data is displayed when data send to Clocks, where
N is digit (0-9)

Setup Mode
Setup mode is for changing configurable parameters.

Easy control with only 2 buttons

Time Mode. Hours and Minutes

(dot is blinking):

Time Mode. Minutes and Seconds

(dot is off):

Alarm1 or Alarm2 Time Mode:
Date Mode (dot is solid on):


Newly designed 4 digits VFD Clock for your attention !

  • Unique ! Ideal Christmas gift - Newly designed 4 digits VFD Clock - first slim VFD Clock on the market !
  • Optimal slim design to use at your desk or wall at home or small office environment
  • Reliable, simple to connect and easy to use Clock!
  • High efficiency and low power consumption for energy saving
  • Use it as a Clock on your table or wall or as Alarm Clock to wake you up
  • Dot and bell symbol are for your convenient Time and Date display reading
  • External alarm outputs give you chance to control a wide range external devices ( power control circuit is required)
  • Easy control with only 2 buttons ( no remote control is required)
  • Backup battery to keep you clock running smoothly.
  • Alarm sounds even main power is off, so you will not miss it in event of mains power failure
Buy it now, pay by cheque, postal order or credit card via Paypal

  • Just follow the link to get this Clock and other items for sale at www.kosbo.com/forsale
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  • Feel free to pay by Postal Order or by cheque, just let me know first by filling in Contact form, which you can find at the top bar Menu
  • Tiny, middle and BIG Nixie Clocks, IV-18 VFD Clock, Nixie Power Supply Module, Nixie Tubes, other items & components are for sale
Specification & recommendation

  • It's fully assembled working VFD Clock, giving you chance to concentrate your efforts on the case design!
    Please send me your complete Clock picture, as I am going to create picture gallery on my WEB page.
  • Clock works from 8 to 15V DC, but 9v wall plug power adapter is recommended choice
  • Power consumption:
    1.7W (190mA@9V) from wall plug power supply (all 4 digits to display)
    9mW (3mA@3V) from backup battery ( 3V CR2330 backup battery).
  • When Clock powers up from backup battery, it does not display any information, buy keeps running and activates buzzer in Alarm1 or Alarm2 events.
  • To keep backup power consumption at low level, do not connect load <100KOhm to the external alarm contact.
  • Internal buzzer generates simple one tone and pause sound in Alarm1 or Alarm2 events. It will last for 1 minute, but could be shut off by pressing the button.
  • External alarm contacts set logical "1" in the alarm event and gives you extra feature allowing to connect quality sound melody generator or any external modules via appropriate converter or power control circuit (not included in this sale)
  • Frequency Test Mode can be activated to easily check and adjust clock frequency. In this mode Clock does not display or keep time and date, for 3 seconds it displays 2000, which means 200KHz, than display switches off and frequency check signal is activated on the dedicated output pin. Use it to check it, if you have calibrated precision frequency meter or use this signal for your calibration purposes.
  • 1 year full warranty.

  • Digit height - 21 mm.
  • One PCB boards - 64x135mm
  • VFD clock, including ILC1-7/5 tube and with (without) connector tips - 30(25)x64x135mm
Latest SW and Documentation

  • Please download the latest User Manual here. To save environment we do not provide printed copy of any documentation with your clock, as it's easy and freely available to download from this web site. Please Download it now.


  • Please feel free to ask me any questions regarding this Nixie Clock. We'll do our best to respond to you within 12 hours.
  • Your design or new function suggestions, improvement are very welcome and will be considered ASAP.
Notice & warning

  • This clock is designed for inside use only. Do not use this Clock outdoor under any circumstances.
  • Some internal components are under High Voltage, before handling or maintenance work, be sure that it's switched off.
  • We do not accept any liability may cause during improper or careless use of this Clock.
  • Due to high voltage on the board, do not use this clock in bathroom, under rain or in the wet and/or dusty conditions.
  • Due to constant improvement, your clock could be slightly different from the described above or shown on the pictures, but technical parameters and functionality will be the same or better than stated above.
For your information

  • Please look at our other items, which we developed for you!
  • Please add our WEB site to your favourites list, as more items will come soon.
  • Next product in our Clock product line is... Please stay in touch to get latest updates
  • Electronics design is our speciality. Please feel free to contact us if you have an idea you want to discuss or
    if you need to develop electronic device.
When you buy it, You will get

  • Fully assembled working VFD Clock. No power supply is included.
    Wall plug Power Adapter is available at extra £7 GBP.
  • Internal synch clock will be calibrated to get the best time accuracy.
  • Downloadable User Manual with detail description how to control your Nixie Clock
  • 1 Year full warranty.

  • First Class Signed For Royal Mail delivery. Just small extra delivery charge to post it to Europe or to the USA, Canada.
  • Your Clock will be fully tested, calibrated and well packed before we dispatch it to you.
  • We'll dispatch your Clock with few working days after we receive your payment.
Picture gallery

Click on the picture to enlarge it.

23 hour 07 minutes
Alarm1 at 06:30 Alarm1 at 08:00 Date: 26 of October