Nixie thermometer – two is better than one!

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

Today I modified the prototype adding the second IN-14 nixie tube: together, they will display the actual temperature in a range from 0 to 99°C.

nixie-20 nixie-21

I simply copied the schematics described in my previous post, adding a new K155ID1 IC and connecting its inputs A,B,C,D to the PINs 6,7,8,9 of the Arduino Pro Micro.

I then realized a test sketch (you can find it on Github) that cyclically executes the following three actions:

  • count from 0 to 9 on the first nixie
  • count from 0 to 9 on the second nixie
  • count from 0 to 9 on both the two nixies at the same time

Here’s a video about my progresses:

[youtube id=”G1HOjlRILfI” width=”600″ height=”350″]

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