This is a servo motor

This is a servo motor and generally speaking it is one of the most common and most useful components you'll find in electronics and robotics. With pretty high torque ratings for just a few dollars, a simple three wire control scheme often only requiring 5 volts DC and a variety of easy to find 3D printable things that can convert the motion into all sorts of features. It's no surprise that these are super useful and show up in a ton of different applications. I'm only controlling one servo at a time, I can put 5 volts ground and the signal wire just straight on Arduino pins. What should I do if I have an application that has a ton, like two, three, four, or even up to 16 servos to control from one location? If that's what you're going for with your project, you might want to look into one of these PCA9685 16 channel servo control boards. These use SDA and SCL, which are serial data and serial clock comms, to communicate via I2C back to a microcontroller like an Arduino, Nano or Raspberry Pi. Then each of your standard three wire servos just plugs along this bank that takes the signal, voltage and ground and since each of them an individual command using this little integrated chip. The result is up to 16 servos that can be commanded in sequence to go to any position you want. This little integrated circuit board is one of the easiest hacks for getting a lot of motion into a project with just a few control wires.