The Marble Sorter

The sorter must sort 15 marbles of wood plastic and steel.
The marble sorter. Must be under 2 minutes. Created as a year 11 engineering project. The brainpad is mounted on the back of the box. Can be easily modified to sort different colours.
Each marble is held in front of the brainpad s light sensor so it can be determined if it is a black or white marble. We were to design model and test of a larger scale machine using marbles as the potential recycled items. A hole is cut in the box so the light sensor can peek through the hole and see each marble. An autonomous marble sorter which raises marbles to a height then separates based on type glass or metallic and colour white yellow and black.
Also the machine should be able to sort individual materials even when mixed with other materials. We were to create this machine which would automated. 30 second time penalty for each wrongly sorted marble.