Using a LEGO® engine as a dynamo

I tried to use a LEGO® M engine as a dynamo to light my little house. In the video, I show, how I built the mechanism to drive the engine/dynamo. I also explain, how an Electric engine works and why it is possible to use it as a dynamo too.

This is not an official LEGO® Fan Media and I am not sponsered by the LEGO® Group!