The goal of the experiment was to know the amount of voltage photovoltaic effect in Silicon solar cell. We had to measure the voltage output of the solar cell and the light intensity output of the light sensor of the NXT. First, we had to start with distance 0 and no light, than 0 cm with light, then respectively 4, 8, 12, and 16cm. This experiment showed variations of voltage (increasing between 0 and 5, decreasing between 5 and 8 and going back up afterwards). See Exhibit below
The conclusion I got from that is that the intensity of Voltage does not depend on the distance from the light.
The second part of the experiment was to try and see the difference if we incorporated colors: Green, Purple and Red. The results were the following: the color green had the lowest voltage, followed by the red color. Purple had the highest voltage. A conclusion in this case would assume that color does depend on the intensity of the voltage.
After doing some research in the purpose of trying to understand the meaning of these results, I found out there were color codings, and that those were universal among all of the power supplies; for example Red was +5V, green represented power on input and Purple: standby power output (not needed for RepRap).
