In this project tutorial we will learn how to make programmable robotic arm. I used 4 DOF simple robot arm for this project, but you can use any robot arm. For example you can use cardboard, hot glue and micro servos for create simple robot arm.
I used 3 pcs micro servos and potentiometer, but you can add more you want. I also used two buttons. One of the buttons is for recording the servo positions, and the other is for restarting recorded servo positions. The code can be changed, if you add more component so make changes it.