This project resulted from a challenge launched by a friend, which involved the creation of a system, controlled by an Arduino, that would allow demonstrating that white light is a mixture of the three main colors, red (R), green (G) and blue (B), that is, the RGB system. Bearing in mind that I always try to combine the useful with the pleasant, this project came in handy.

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With regard to the usefulness of this system, for me, it will be its use in classes on “Light and color dispersion”, which is taught in the discipline of Physical Chemistry, in the 8th year of schooling.

 

As for the pleasure, it was increasing my knowledge about this Arduino platform, because this system, instead of using a commercial Arduino controller (Arduino Uno R3 or others), the controller was built from scratch and adapted to work only for this system, that is, a “homemade” Arduino.

 

For this project to be complete, the ideal would be to dimension and build the PCB board but, taking into account that I don't have the knowledge and material to do so, I built the system on a prototyping board.

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As for the box the system was placed, it is already in the second version. The first is gray in color, but it was relatively uncomfortable. Thus, a new one, in orange color, was built, easier to work with and to transport. The files, in stl format and the code used, can be downloaded here. The schematic can be downloaded here.