Crédits:
20 févr. 2016
A mechanical calculator, which is capable to add and substract, featured carry mechanism, keyboard, overflow mechanism and openable part for set up.
Picture and building instructions : http://www.nico71.fr/mechanical-calcu...
See the other parts to understand more the functionning :
http://www.youtube.com/watch?v=VHQRJF...
http://www.youtube.com/watch?v=kTcl0x...
http://www.youtube.com/watch?v=EdQMKc...
Don't forget to subscribe friend :)