So most of us have heard of the famous shifters that allows us to discard the choice between speed or torque in a drivetrain, and switch gear ratios on the fly. Almost all of the shifters I see use pneumatics, whether its a kit from Vex PRO, AM Super Shifter, or whatever. However, I have heard of teams using shifting gearboxes that do not require pneumatics.
Now this leads me on to ask, how do they do it? Is it electrical solenoids? What are the secrets and is it possible to build or purchase a repetitive and reliable one that matches up to the famous Vex PRO ball shifters?
Thanks in advance!