Project: Pulley systems

**UPDATE** **Check my new project [Gyrosphero](http://www.thingiverse.com/thing:1674158)** **UPDATE** **New version [Pulley systems V2](http://www.thingiverse.com/thing:1713315) with wheel using a planetary gear as bearing.** To demonstrate how simple and multiple chain hoist/pulley block work we need to have one or more pulleys. A functional single or multiple pulley is the result of this project. It can demonstrate the transmission of forces and weights in physics. During the design and construction process, the use of basic 3D geometry has been used.