How would one go about passing power through a motor?
Let's say we have some basic robot which has a motor that slowly spins a limb, on each end of that limb, there is a motor which again spins a limb. Because the first motor is always going to be spinning, any wires would twist and eventually break, so a wired approach wouldn't work. The same goes for the subsequent motors.
I know that dc motors use brushes to get past this, but how is this generally solved in engineering/robotics? This must be a problem that has come up before, and there must be a solution to it.
Any ideas? :)