Konstruiert
und fotografiert
von
Willem Evert Nijenhuis.
Hochgeladen am 7.3.2016, 12:45 von winijenh.
6 / 16
This is what the backside looks like: 7 neatly spaced shafts. They need to be turned 90 degrees clockwise or counterclockwise is order to switch a segment from red to yellow or vice verse.