Using a servo controller to control the servos
To make your arms move, you first need to connect the servo motor controller to the servos. The servo controller you are going to use for this project is a simple servo motor controller utilizing USB from Pololu, Pololu item #: 1354 available at http://www.pololu.com, which can control 18 servo motors.
Here is a picture of the unit:
Make sure you order the assembled version. This piece of hardware will turn USB commands from the Raspberry Pi Zero into signals that control your servo motors. Pololu makes a number of different versions of this controller, each able to control a certain number of servos. ...
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