TCS3200 RGB Color Recognition Sensor Module

The TCS3200 detects color by filtering incoming light through red, green and blue photodiode filters and converting the intensity of each into a square wave whose frequency scales with brightness - a microcontroller reads color as a set of three frequency measurements rather than an analog voltage, which turns out to be a more noise-resistant way to digitize color. Onboard white LEDs illuminate whatever the sensor is pointed at, so readings stay consistent regardless of ambient lighting.

Both the color filter selection and the output frequency scaling are software-controlled through two digital select pins each, giving a project control over sensitivity and response speed without needing to swap hardware. That flexibility is what lets the same sensor work well both close up, reading a small color patch, and further back, reading a broader surface.

Common builds are color-sorting robots, line-following robots that follow a colored line rather than just a dark one, and any project that needs to identify or distinguish objects by color.