Waveshare TCS3200 Color Sensor

A basic light sensor can only report how bright something is, which is useless for a project that needs to tell colours apart - a sorting machine separating red from blue parts, a robot following a coloured line, a device verifying a product's packaging colour. The TCS3200 solves that by reading the red, green, and blue components of reflected light separately, giving a genuine colour reading rather than a single brightness value. That makes it the right sensor whenever a project's logic actually depends on distinguishing one colour from another, not just detecting whether something is there.