In this chapter, we learned how servos differ from motors, and the difference between regular and continuous servos. We also learned about the constructor for the Johnny-Five servo object and its functions. Next, we built a project that taught us how to group servos with the servos object, and control them from the Pi's command line via REPL. Then, we built a project that showed the ability of the servo to convey information as well as create movement by building a light meter. Finally, we learned more about and played with continuous servos.