A 6 degrees of freedom robotic prosthetic arm built during a masters level course at CMU. My team focused on the 3 degrees of freedom upper arm and shoulder which is connected to the elbow and the plastic &quot;backpack&quot; that the user wears. The upper arm and shoulder is made out of aluminium and carbon fibre. It uses bowden cables for flexion/ extension and abduction/ adduction. It also uses an AC motor for medial rotation/ lateral rotation. The arm is controlled by motors on the back (not seen in the picture) and could ostensibly grab an object the size of a soda can. Music from <a href="https://www.youtube.com/watch?v=e53UZG6arjE" target="_blank">https://www.youtube.com/watch?v=e53UZG6arjE</a>