Electric window opener,

UPDATE: video: http://youtu.be/kuJ2semcIVk

A couple of years ago I started to study Electrical Engineering. Since then I always wanted an automatic window opening robot. The reason for this is that I live in the Netherlands where it often rains. Normally it is not a real problem to open or close the window that is a few meters away. However, it often starts raining at night when you are nice and cozy in your bed. A solution for this first world problem is to shut the window when rain falls onto a sensor or when a button is pressed.

A few years ago I tried making it from wood and metal, but this failed due to improper mechanical construction and the lack of mechanical engineering skills at that time to make a shaft coupler strong enough to push a window open without slipping. Being annoyed with the mechanical problems I set the project away for some time... I recently finished a mendel which can print parts reasonable good and I needed an idea for which I could use a 3D printer.