Before I start to interface the sensor with Arduino, I need to ensure that there are no light interference from the outside other than the light that only will be reflected by the colour paper. The sensor only need to sense the colour of the light of colour paper to get a precise value or result.
In order to gain the precise result, I have made a box for the sensor module. This box will prevent the outside light from interfere the sensor to sense the exact colour of the colour paper. The height of this wall is 1.8cm.
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