Make a Raspberry Pi-Controlled Robot

Chapter 6. Installing ServoBlaster

The current design of the rover has only one servo: a high-torque model used for raising and lowering the robotic arm (Figure 6-1).

Figure 6-1. High-torque servo

However, you may decide to add more servos as the build progresses. You could change the design of the arm to give it two or three degrees of freedom (DOF), or you might add other attachments such as a gripper claw, a sample return arm, or a laser turret. Whether you keep the rover simple, with just a robotic arm, or you add to its capabilities, you’ll need to be able to control those servos smoothly and effortlessly.

Servos

At its core, a servo (or servomotor ...