http://hackedgadgets.com/category/cool-gadgets/
You can download this in english.
http://www.mikrocontroller.net/articles/AVR_Transistortester#Einleitung

i will be building one of theses "pot clocks"

http://hackedgadgets.com/2014/10/05/plot-clock/

one of the most fun things i have seen in a while... just to easy with 3d printing...

i even have the servo's and a mini  Arduino... ready to go!

nice!!!!

sketch and everything already to go! most wonderful project! ( and useful)

~Russ