Robotic Arm 4 Axis

A fun and easy to assemble robotic arm.

You will need:
some nuts of various lengths mostly 10-12 mm
4 skateboard bearings
4 Cheap stepper motors and drivers(28BYJ-48)
6V servo (best a high torque)
Arduino and breadboard

I used a spool of filament as base of the robot but you can also just use a rol of duct tape.