How to make: an Exo Skeleton Arm for $100

How to make an Exo skeleton arm in 2 days with only $100.

We are developing a relatively cheap, simple and yet powerful exo-arm design that will allow for a easy usage, which is especially important for elderly and other people who need this kind of help in everyday life.
If you are interested in following the development and updates, there is a project page:

This is also a project entry for Hackaday 2017 prize.