Is it really possible to build a rotary encoder out of a flattened tin can and a couple of photodetectors? Sure it’s possible, but what kind of resolution are you going to get from such a contraption?

Rotary and linear optical encoders are common in position and motion sensing. Here, a disc or plate containing opaque and transparent segments passes between an LED and detector to interrupt a light ...

Sponsored by Encoder Products Company, Harmonic Drive LLC, maxon, Performance Motion Devices Encoders convert motion to an electrical signal that can be read by some type of control device in a motion ...