Thanks for your reply.
I was thinking about this too at first. The problem is, the (fixed, in the ground) axis diameter is 0.3m and the solar panels are rotating around this axis. The panels are floating in water (the system is placed in a swimming pool), so the panels are sliding up and down...
I am looking for a digital device that is able to measure the angle of a rotating device.
It will be used to align rotating solar cells with the sun. These cells are attached to a flat panel, that is fixed in the center with an axis, so only circular movement is possible. The panel needs to...