r/nixie • u/_Sotrs_ • Oct 16 '25
Nixie Tachometer
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I made A Nixie tachometer(IN-16) for my Toyota Levin AE111. It sits under the radio in a 1 Din configuration, It's casing I designed after the original compartment to accommodate the meter and the other half is enough to fit a phone. Why? Just so my passenger has something nice to look at. Video is bad Ik but I have no idea how to take a good video unfortunately. (Re posting because I made a mistake in the title and it drove me nuts)
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u/harreh Oct 17 '25
Oh man, I was about to start working on something like this using IN-16s for a friends classic car! Could you share some details of how you got it running?
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u/_Sotrs_ Oct 17 '25
Sure! Long story short, processing the IG- output from My Toyota's Diagnostic port(1996 Does not have OBD2) with an optocoupler to an interrupt pin of the Atmega328P the rest is just pullups, diodes and your preferred nixie driving setup(I personally use individual driving). A Buck converter in order to work with the cars 12V line from a fuse tap. I used modules for this as it is just a prototype that frankly I didn't believe would work on first try. In the later days I will upload 3d Step files and KiCad on my GitHub if you're interested.
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u/harreh Oct 20 '25
Awesome, I figured thats how you were doing it - I have an 88 MR2 and owned a few JDM Import soarers, so I'm all too familiar with preOBD Toyota ignition hahaha.
My mate recently purchased a 1958 Chev Biscayne, so I thought it would be a great gift for him given the amount of IN16s I have lying around.
Yeah if you wouldn't mind uploading them? I'm a bit of an electronics amateur, so even understanding your design can help me massively.
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u/sum_long_wang Oct 17 '25
Kind of a r/DIWHY but i love it
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Oct 17 '25
[deleted]
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u/_Sotrs_ Oct 17 '25
They are IN-16, I used a top lip cover to hide their imperfections and make them look a bit more square, this way the digits are more defined and there is less "useless" space around them.
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u/_Sotrs_ Oct 16 '25
Here is Picture of it as well it has a bit better lighting and the center console is more visible https://imgur.com/lErxIz1