Servo Driven 3 Speed Automatic Gearbox

[TechnicBrickPower]

Here's my 3 speed automatic gearbox using a servo motor to drive the gear change mechanism. The servo motor is activated by an electric switch which in turn is driven by a torque detector using a differential at the output. The automatic gearbox will switch to a lower gears automatically as load is detected on the output of the gearbox allowing it to generate more torque to overcome the load.

 

 

[BrickBuildingFox]

Wow, such a sophisticated mechanism.

[2GodBDGlory]

Good work!

Before switching my automatic gearbox strategy to PU programming, I ambitiously tried a similar project to make an 8-speed automatic, in which the servo motor would operate a "paddle shift" sort of mechanism, requiring a return to center cycle, also controlled by a switch. My design was much more complicated though, and didn't work at all, unlike your much more reliable design!