Nothing overly special, but I made this this afternoon. Running esphome, connected to a servo and automated through Home Assistant. Currently hard wired but will take any tips on making it battery based 
Thinking a small battery, deepsleep hourly and a transistor to cut power to the servo. I buy stuff like this at the local auction house with the intent to do stuff like this -just never get the time!
4 Likes
So, what are you doing with the other gauge(s)?