Hello, I’m Simon and I’m new here
We got a pack of Duracell AA batteries years ago and there was a simple digital thermometer shipped with it.
My father liked it very much because it just showed the temperature with a big lcd display and was powered by a single AA Cell.
But it fell on the floor and the display is now broken.
I was looking around for something similar, but most thermometers have either those small battery cells (which are very overpriced here in Switzerland) or things like air humidity in the display, which we don’t need.
Should I try to find some similar lcd screen to repair it or should I try to make my own?
I have a little experience with Arduinos, soldering and have access to a 3D printer.
I've been thinking about replacing the battery with a supercap and a solar cell, but I don't think this would be enough for uninterruptible operation.
A solar cell and a lithium battery may lead only to more complexity.
Sticking to AA batteries would be the easiest solution, but I don’t have the know-how to do a project like this, especially for low energy consumption devices.
Is it even a good Idea to use a microcontroller, or are there ICs which can handle this task better?


Thank you very much for your answers