Summary

Robotic Arm - 4 DOF !

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Motors used: SG90 https://www.amazon.it/gp/product/B01MXPTCHO/ref=ppx_yo_dt_b_asin_image_o02_s00?ie=UTF8&psc=1

Post Processing
Creates the holes for the screws using a drill.
Connect all together and make it works using an Arduino or another control board.