Many machines are able to sort out items based on shapes, sizes, weights and, possibly texture. However, sorting by colour and smell accurately are near to impossible. The reason why colour is difficult to sort out is that there are so many colour combinations that we need to use numbers to represent them. (Can you imagine just a colour of red can have 255 shades of red colour and if we want to have a combination of 7 rainbows colours in different shades, how many possibilities do we get into?)

Thanks to https://www.howtomechatronics.com on the youtube, I was able to modify the design and 3D printed the structural framework. Stead of sorting out candies, I have made it more challenging to sort the colours of flat token. All parts are re-designed to suit the use of flat tokens instead of using candies.
Click the following link to lead you to design and fabricate the colour sorting machine.

https://youtu.be/PUddhPcAm2g