Use a Stepper Motor As a Rotary Encoder: Rotary encoders are great for use in microcontroller projects as an input device but their performance is not very smooth and satisfactory. Also, having a lot of spare stepper motors around, I decided to give them…

Rotary Encoder Switch: This Instructable covers the shaft switch on mechanical incremental rotary encoders.There are linear encoders, as well as optical, magnetic, etc. encoders. These later encoders are relatively expensive, and not as common as the more…

Wooden Disc Player: I wanted to demonstrate how information storing devices work by building a large scale disc playing machine. Instead of being based on light interference like CD players, the device I built plays wooden discs with holes and "non-holes"…