My nephew invented a low cost prostetic hand with an arduino:

[Beamin]

My nephew Evan invented a low cost hand for people who are poor or in developing countries. My prediction that ardunos / micros will power everything is comming true! My family is quite competitive doing charities with my cousin Greg starting the ice bucket challenge for a member of the college baseball team he coached, but Evan might have one upped him. 

https://news4sanantonio.com/news/local/utsa-engineering-students-develop-low-cost-bionic-prosthetic-arm

[joeqsmith]

Nice work