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Color Sensor Recognition Module GY-31 TCS3200
Input voltage: DC 3 - 5V
Use bright white LED lights
Can be connected directly with Microcontroller
Static detection of the measured object color
Best detection distance: 1cm
1 x GY-31 TCS3200 Color Sensor Recognition Module For Arduino
How TCS230 Color Sensor Works
The TCS230 senses color light with the help of an 8 x 8 array of photodiodes. Then using a Current-to-Frequency Converter the readings from the photodiodes are converted into a square wave with a frequency directly proportional to the light intensity. Finally, using the Arduino Board we can read the square wave output and get the results for the color.
If we take a closer look at the sensor we can see how it detects various colors. The photodiodes have three different color filters. Sixteen of them have red filters, another 16 have green filters, another 16 have blue filters and the other 16 photodiodes are clear with no filters.
All 16 photodiodes are connected in parallel, so using the two control pins S2 and S3 we can select which of them will be read. So for example, if we want to detect red color, we can just use the 16 red filtered photodiodes by setting the two pins to a low logic level according to the table.
The sensor has two more control pins, S0 and S1 which are used for scaling the output frequency. The frequency can be scaled to three different preset values of 100 %, 20 % or 2%. This frequency-scaling function allows the output of the sensor to be optimized for various frequency counters or microcontrollers.
Now we are ready to move on and connect the TCS230 sensor to the Arduino board. Here’s the circuit schematics.
You can get the components needed for this Arduino tutorial from the links below:
- TCS230 TCS3200 Color Sensor…….
- Arduino Board ……………………………
- Breadboard and Jump Wires ………
TCS230 Color Sensor Source Code
Description: First we need to define the pins to which the sensor is connected and define a variable for reading the frequency. In the setup section we need to define the four control pins as outputs and the sensor output as an Arduino input. Here we also need to set the frequency-scaling, for this example I will set it to 20%, and start the serial communication for displaying the results in the Serial Monitor.
In the loop section, we will start by reading the red filtered photodiodes. For that purpose, we will set the two control pins S2 and S3 to a low logic level. Then using the “pulseIn()” function we will read the output frequency and put it into the variable “frequency”. Using the Serial.print() function we will print the result on the serial monitor. The same procedure goes for the two other colors, we just need to adjust the control pins for the appropriate color.