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.
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: