https://www.youtube.com/watch?v=vbl-Igz913A


This is something I built a while ago. I don' think there is anything similar on the web..

If interested in more details on construction etc. just ask

I had in mind to add a position detector with an optical sensor (found in old computer mice) but I never implemented it.

It would be interesting if someone is to add an automatic switching circuit

 

This seems to be new. Has it ever been done before?

 

This seems to be new. Has it ever been done before?

I couldn't find anything similar on the web..

The idea came to mind after I saw the simple compass on floating corks etc.. science experiments.