Tough rotary encoder from old FDD Stepper

[TheAncientOne]

I found this today - how to make a rotary encoder from and old disc drive stepper motor. Too big and complex for use in (say) a sequencer, when you need a lot, but very good for uses like parameter setting, jog wheels and possibly DJ 'scratch' controllers. Good stepper motors would last forever in this mode, and have nice ball bearing mounted spindles, too.

Rotary Encoder Using Old Stepper