Nixie thermometer – Completed!

luca 15/02/2016 14
The design and development of this project is described in ten blog posts: for the chronological list follow this link

Today I received from Elecrow the PCB for my Nixie thermometer:


Here are two photos of the top and bottom sides:

nixie-40 nixie-41

First, I soldered the female connectors for the Arduino and the power supply module on the bottom side; then I soldered the sockets, the resistors and the 5V voltage regulator on the top side:

nixie-42 nixie-43

Before going further, I performed a smoke test: it’s indeed very important to check that the power supply is correct measuring with a multimeter the voltage that is present in different points (sockets, leds…) of your circuit. The test was ok, so I put in place the nixie with the symbol °C and verified that it lighted up (that nixie is directly connected to the power supply):

nixie-44 nixie-45

At least, I soldered the led modules, inserted the drivers in their sockets and put the other nixie tubes in pace: the project was completed!

nixie-46 nixie-47

nixie-48 nixie-49

nixie-50 nixie-51


Here are some shots of the nixies with different led colors and a short video about the project:

nixie-60 nixie-61

nixie-62 nixie-63

nixie-64 nixie-65


When I was assembling the first PCB, I noticed two mistakes:

  • the silk screen of the power connector is wrong: the + mark is near the negative pin
  • the distance between the nixie tubes is not enough: the PCBs overlap

nixie-52 nixie-53

I’ve already updated the Eagle files in my Github repository


  1. jan 03/07/2016 at 11:48 - Reply

    hi, do you sell the nixie thermometer kit?

    • luca 25/07/2016 at 09:28 - Reply

      Hi Jan, no: all the design files are available on my repository but I don’t sell PCBs or complete kits.

  2. ed 12/02/2017 at 23:46 - Reply

    looks great

  3. Mark 12/03/2018 at 15:52 - Reply

    Hi, super project! But, why don’t you finish the clock with interesting idea to use PCF8575 IC? Clock can maybe show temperature.. please.. finish the clock with pcb.. Thanks!

    • luca 14/03/2018 at 10:24 - Reply

      Hi Mark, this is not a clock… it’s a thermometer

  4. Mark 15/03/2018 at 14:29 - Reply

    I now, but i mean this project (your) – not finished clock project..

    Most nixie clock show temp, who need separate temp?


  5. Mark Dober 16/04/2018 at 09:51 - Reply

    7812T for 5v?
    Is this right?
    I thought maybe 7805

    • luca 17/04/2018 at 15:39 - Reply

      Hi Mark… confirm it’s a 7805

  6. Phillip 14/06/2018 at 14:37 - Reply

    Is there a list of components? I rly want to build this for my fallout style casemod.

    • Phillip 14/06/2018 at 22:50 - Reply

      So most things i have figured out by now but i cant find what power supply you used. Can i get it from somewhere?

      • luca 15/06/2018 at 09:50 - Reply

        Hi, unfortunately it’s no longer available but you can use any other Nixie PSU

    • luca 15/06/2018 at 09:44 - Reply

      Hi Phillip, you can find all the components in the Eagle project

  7. Phillip 30/07/2018 at 20:59 - Reply

    I have all the parts now and did some soldering but i dont know how to upload the code to the arduino pro micro. When i try to upload the code i get this error:

    stray ‘#’ in program

    What version of arduino IDE do i need? Do i need to have any librarys? I m a total noob to programming …

    I uploaded this code:–fio-v3-hookup-guide#example-1-blinkies and it worked so i must be missing something. Could you help me pls? :)

    • luca 04/08/2018 at 13:23 - Reply

      Hi, Arduino Micro is ok, you only need to install the NeoPixel library by Adafruit in your IDE.

Leave A Response »

Click here to cancel reply.

This website uses cookies to ensure you get the best experience on our website maggiori informazioni

Questo sito utilizza i cookie per fonire la migliore esperienza di navigazione possibile. Continuando a utilizzare questo sito senza modificare le impostazioni dei cookie o clicchi su "Accetta" permetti al loro utilizzo.