Mini-Mapper 6: Motor encoder mechanical design

Before looking at the circuitry needed for the motor encoder, we need to think about the mechanical interface between the motor, motor encoder and the motor prototype PCB.

The idea is to have an encoder disk attached to the motor output that passes through the gap of a photointerrupter (an infra-red LED and a phototransistor in a shared package with a slot in it), and for the photointerrupter to be mounted on the PCB, with the PCB being attached to the robot chassis. Getting all that to work nicely requires a little bit of mechanical design, which is what this video is about!