NOTE! There are a couple of different designs of these servos, even from the same vendor.
- The written notes below are for a through-hole style board
- The video covers the non-through-hole syle
- One kind of Potentiometer has rotation stoppers which must be broken off.
- One kind of Potentiometer rotates freely and doesn't need to be modified.
- If you don't need to modify the pot, you don't have to remove the stack of gears.
Continuous rotation servers are popular for cheap robotics projects because a pair of them give you a complete drive train (motor, controller, and gears). A pair of 9 gram servos (such as the popular HXT900 from hobbyking) should be less than $7 or so.
