Arduino 3D printed robotic arm

UPDATE: Мy New project of robotic arm with Record-Play abilities аt: This project uses 4pcs. cheap SSG 90 servo motors that are powered by the Arduino board. You can download .stl files for 3D printing from the link given below , or directly to Thingiverse web : :1015238 , where you can find more detailed instructions for making of this robotic arm. As mentioned earlier, the servo motors are driven from the Arduino board. For this purpose I also wrote a simple code so that each servo is controlled by a suitable potentiometer. After a small exercise, handling using potentiometers becomes very easy and interesting as can be seen on the video. In the future, I will try to expand the code with the option to capture and automatically perform certain movements of servo motors which would get a complete industrial robot. Instructions , schematic and code: