This is a Throttle or foot lever based on a potentiometer.
This makes it easy to use this with an Arduino or DIY motor driver.
I also included (optional) end switches.
I tried to explain everything in the pictures but if you have any questions feel free to ask :-)
Printed in PET-G res 0.2mm
Printers: Customs & Anets
Design Programs: 123D Design, Inkscape, MeshMixer