Nixie thermometer – let’s display the temperature

by luca
The design and development of this project is described in ten blog posts: for the chronological list follow this link

Today I wrote a sketch that merges the previous ones: reads the temperature from a thermistor (connected to PIN A0) and displays it driving two nixie tubes.

I also added a third nixie, to display symbol °C. This tube is not controlled by Arduino but it’s directly connected to the power supply (and therefore it’s always on):

nixie-28 nixie-29

nixie-30 nixie-31

The sketch is available on Github, here’s a video about how it works:

[youtube id=”8wn8dOwsaXs” width=”600″ height=”350″]

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Markus Wednesday March 29th, 2017 - 04:37 PM

Bon giorno,

is the themometer able to display 3 digit temperature (no celsius, but third digit) to show temperatures between 100° and 350° C ??? it will probably take a different sensor that will NOT melt and is able to messure this temp range

if so – i´m VERY interessted

luca Friday March 31st, 2017 - 09:46 AM

Hi Markus, of course with some small modifications you can display 3 digits… at the moment the schematics (and the PCB) is missing the control circuitry (chip, connections…) for the third nixie as we only need to light up the segment corresponding to the “°C” symbol.


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