Electronics > Beginners
Simple thermometer, repair or rebuild?
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fatunicorn:
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
tunk:
Is this an alternative: Ikea has a clock/thermometer called klockis which uses two AAAs.
And I would guess that an arduino eats batteries.
Wimberleytech:
Not sure what itch you are trying to scratch, but here is a simple solution
https://ebay.to/2YWxiTd
MosherIV:
Hi Simon.
Welcome to the forum.

I am affraid that repair maybe not be possible.
As far as I know, the only commonly available lcd screen available are generally either 3 or 4 digit counter type or maybe for digital clocks.
I do not think you will be able to easily find a replacement lcd screen for a thermometer.

It is really not worth making your own thermometer unless it is for the learning experience.
ledtester:
This one has fairly large digits:

https://www.aliexpress.com/item/32997183403.html

or have a look here and see if anything strikes your fancy:

https://www.aliexpress.com/af/large-lcd-thermometer.html?SearchText=large+lcd+thermometer


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