Columbia University Mechanical Engineering -- Senior Design Project.
Designed and built a mechatronic automatic shifting mechanism with prototype budget of $600.
Our project won first place in the contest.
System clamped onto bicycle frame and used existing shift cables, derailleurs, etc.
Two linear actuators were used to pull the shift cables.
I was responsible for the mechanical design, including linear actuator and power electronics specification. 3D printer was used to created the prototype parts (injection molding was production intent).