For instance, the Serial Servo Raspberry Pi HAT offers multiple powering options, four Serial Servo connectors, four programmable buttons, an on/off switch, and a 1.14” TFT Display for status ...

To start with you will need two micro servo motors. The author found that “Tower Pro Micro Servo – SG90” motors were prefectly suitable. The two servos (Left and are Right) are driven by the D6 and D5 ...