About this 3D model

Useless so vital, this box will amaze you. All you need is two switchs, a servomotor ( http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=56184 ), 2 AA batteries and a limit switch ( http://www.amazon.com/Micro-Switch-Roller-Subminiature-Action/dp/B007Q819LS/ref=sr_1_7?s=hi&ie=UTF8&qid=1443008663&sr=1-7&keywords=limit+switch ). To assemble, follow the electrical plan. Check the video here: https://youtu.be/s8B2bKHoy3g