I just cleaned up my workspace and found an about 50 years old multimeter. I didn’t want to throw it away, so I thought about what I could do with it. I came up with the idea to use it as a temperature display. The setup was quite easy - I connected a NodeMCU to the inputs and used the analogWrite function to create a PWM signal. The result came out pretty linear. 0 - 0V to 1023 - 3v3. Fortunately the meter has a 1v5 Range, so I could use the whole scale. Then I wrote a small program to receive the temperature via http and created a HomeAssistant automation, which updates the meter every time the temperature in the room Changes. This is what the final result looks like:
I hope I motivated someone to build something like that 
(Also works with a modern Fluke, but it doesn’t look as half as cool, does it? 
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