Hey folks, this is my very first own bigger design. So if you have any comments on how to improve it, I'd be glad to hear them!
In chemistry lessons, there are often situations in which the conductivity of solutions or solids is tested in order to explain the results.
There are “low budget” conductivity testers on the internet, but they are still very expensive for the components used - for example, this page is selling one of those “low budget” things for 10 €: https://www.microscaleandmore.de/Microscale-Leitfaehigkeitspruefer/091005.1
So I built a kind of ghetto engineered version and constructed a case for it.
You need to print the following parts:
You also need the following parts:
The circuit is relatively simple: the switch and LED are connected to the positive terminal, the resistor to the negative terminal.
As you can see, this even works with my very poor soldering skills.
Have fun!