{"id":80275,"date":"2024-06-19T14:42:06","date_gmt":"2024-06-19T18:42:06","guid":{"rendered":"https:\/\/www.engineersgarage.com\/?p=80275"},"modified":"2024-10-09T00:04:49","modified_gmt":"2024-10-09T04:04:49","slug":"how-to-detect-diffrent-colors-using-tcs230-tcs3200-sensor-with-arduino","status":"publish","type":"post","link":"https:\/\/www.engineersgarage.com\/how-to-detect-diffrent-colors-using-tcs230-tcs3200-sensor-with-arduino\/","title":{"rendered":"How to use the TCS230\/TCS3200 color-recognition sensor with Arduino"},"content":{"rendered":"

Color detection is the process of identifying and distinguishing colors within an image, video, scene, or object. Many embedded and robotic applications require this feature, as it\u2019s useful for sorting, selection, test strip reading, path determination, and more.\u00a0<\/span><\/p>\n

Two standard sensors used for color detection include TCS230 or TCS3200. TCS3200 recognizes various colors based on their wavelength and is easy to interface with any microcontroller using GPIO. TCS230 is slightly more sensitive, detecting a narrower range of colors with higher precision.<\/span><\/p>\n

In this project, we\u2019ll interface the TCS230\/TCS3200 sensor (either can be used) with Arduino Mega, calibrate the sensor, and derive the RGB values for specific colors.\u00a0<\/span><\/p>\n

Components required<\/span><\/strong><\/p>\n

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  1. Arduino UNO\/Arduino Mega x1<\/span><\/li>\n
  2. TCS230\/TCS3200 color sensor x1<\/span><\/li>\n
  3. Connecting\/DuPont wires<\/span><\/li>\n<\/ol>\n

    The color-recognition sensors
    \n<\/span><\/strong>TCS230 and TCS3200 sensors detect and measure the intensity of light across different wavelengths to determine the color of an object. They can detect various colors using an array of photodiodes with different filters.\u00a0<\/span><\/p>\n

    TCS230\/TCS3200 contains four white LEDs that light up the object in front of it.\u00a0<\/span><\/p>\n

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    Typically, color-recognition sensors have four channels: red, green, blue, and clear (no filter). The TCS3200 has an array of photodiodes with four filters. In total, it has 16 photodiodes with red, green, and blue filters that are sensitive to red, green, and blue wavelengths; and it has 16 photodiodes without filters.<\/p>\n

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    These sensors control the integration time during which they collect light. This allows them flexibility in adapting to different lighting conditions for greater color-recognition accuracy. TCS230\/TCS3200 provide analog output signals proportional to each color channel’s light intensity. They also have a frequency-to-voltage converter that converts the color information into a voltage signal, which can be easily measured.<\/p>\n

    Additionally, TCS230\/TCS3200 uses a modulation and filtering technique to eliminate ambient light interference, further improving the accuracy of color detection. By selectively choosing the photodiode filter readings, the strength of colors can be identified.<\/p>\n

    These sensors operate at a voltage of 2.7~5.5V DC and have the below pin diagram.<\/p>\n

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    Description of the TCS230\/TCS3200 pin configuration:<\/p>\n

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    Pins S2 and S3 are used to read the light intensity of a particular color. The photodiodes are connected in parallel, so setting S2 and S3 to LOW and HIGH in different combinations allows the photodiodes to be matched to the corresponding colors.<\/p>\n

    The colors are selected as per the following table.<\/p>\n

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    Pins S0 and Si scale the output frequency to 100%, 20%, or 2% of the preset parameters. Scaling the output optimizes the sensor readings for different microcontrollers or frequency counters.<\/p>\n

    When using Arduino, 20% is typical. Scaling using pins S0 and S1 is done according to the following table.<\/p>\n

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    Circuit connections
    \n<\/strong>For this project, we\u2019ll connect the TCS230\/TCS3200 color sensor with the Arduino Mega as follows:<\/p>\n