A part of the stuff is arriving so we’re trying to install the copper in solenoid. We’re working on a small size to keep it on the arm, but it need to be a bit powerful to have what’s necessary to recharge a cellphone. We’re beginning the design of the box . But technical question is on the table: how to build the box? In first time, we began to design it on Solidworks, it enabled us to have all the good dimensions and we made different trials.