As our intention was to integrate the control of the light in the house itself and decided that rotating the house would change the light, we specifically designed a hat-head mechanism, so that we can detach the lampshade from the base for set up and troubleshoot the electronics, but at the same time allow lampshade rotation to drive the rotary encoder fixed to the base. The head is a solid cube glued to the rotary encoder. And the hat is a cubical shell with open bottom glued to a cross spanning the light shell. Whenever the lampshade-cross-hat whole rotates, the hat would bring the head to rotate since they fit perfectly. Therefore the rotary encoder rotates. We also carefully place the hat-head higher than all the other electronics, so that the wires and parts will not interfere with the rotation movement.