Kenneth Finnegan sent me a link to a project that he has been working on - it is an AVR based IN-16 nixie tube thermometer.  It appears to be a pretty straightforward design and what I really appreciate about this is that he does a great job documenting his build and sharing code samples with readers.  I've included the part list below so you can get an idea of what is involved but be sure to check out his website for more details, schematics, and photos!


Parts list for control circuitry:

  • 1x ATTiny2313 AVR
  • 1x DS1631
  • 3x IN-16 Nixie tubes
  • 3x K155 or 74141 Nixie decoder
  • 3x 22kΩ resistor
  • 3x 4.7kΩ resistor
  • 1x MPSA42 300V NPN signal transistor



Parts list for power supply:

  • 1x MC34063 boost converter (I managed to smoke the first one with 180V pretty quickly, so having it in a socket and having spares is a good idea)
  • 1x 7805 5V linear regulator
  • 1x IRF820 MOSFET
  • 1x 500μH power inductor
  • 1x 1N4937 600V fast-recovery diode
  • 2x 100μF 100V capacitors (or a single cap rated for >200V)
  • 1x 820k resistor
  • 1x 5.6k resistor
  • 1x 150Ω resistor
  • 2x 47μF capacitor (25V)
  • >2x 0.1μF capacitors (25V) - Apply liberally throughout the circuit



AVR Nixie Thermometer
AVR Nixie Thermometer
AVR Nixie Thermometer
AVR Nixie Thermometer
(images and text used with permission)




#1 Stefan 2012-02-24 15:42
Great. I´d like to built this projekt too. where i can get the hex file to programming the controller?
#2 Ian 2017-01-10 15:45
Have a look on the "Project Page", the code is there. ;)
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