Exercise Bike Controller - Encoder to Crank Gears

Gears to connect a rotary encoder to an exercise bike or other rotation-based exercise equipment.

More project information: http://jaymis.com/2016/06/exercise-bike-controller/

Rotary Encoder Bracket on Tinkercad: https://www.tinkercad.com/things/dvZciyZ8qL0-rotary-encoder-bracket
(I used long, releasable cable ties to attach this to my exercise bike, but there are plenty of mounting possibilities.)