Description

Color Detector with Arduino and OLED display

In this tutorial we will show you how to build a color detector using the TCS3200 sensor and an SH1106 OLED display , all controlled by an Arduino board . This system can recognize colors and display them clearly on the OLED screen, ideal for robotics projects, object classification, or any creative idea you have!

What will you learn?

Configuring the TCS3200 Color Sensor : Learn how to interpret the RGB information detected by this sensor.

Integrating an SH1106 OLED display : Discover how to display results in a readable and attractive format.

Processing Color Data with Arduino : Master converting readings into useful values for your projects.

Why This Project?

This project is not only fun to build, but also very useful for learning about sensors and data processing. Plus, you can expand it with new functionalities, such as classifying objects or making more precise color measurements.

Read on to discover the step-by-step instructions, the materials you need, and the code to take your color detector to the next level. Let's get started!

Electronic components of the project

A socket for arduino

Female pins

Dupont cables female male

Display oled sh1106

This is a 128x64 dot monochrome OLED display module with I2C interface. It has several advantages over LCD displays, such as high brightness, very good contrast, a wider viewing angle, and low power consumption. It is compatible with Arduino Rasberry Pi and PIC microcontrollers among others. It works with logic levels from 3.3V to 5V and has a viewing angle greater than 160 degrees. The screen size is 1.3 inches. It is powered by a voltage of 3.3V to 5V. It can be used in applications such as smart watches, MP3, thermometers, instruments, and various projects, etc.

Features

Interface: I2C(3.3V / 5V logic level)

Resolution: 128 x 64

Angle of view: >160 degree

Display color: Blue

Display size: 1.3 inch

Driver IC: SH1106

Power supply: DC 3.3V~5V

Operating temperature: -20~70’C

Application: smart watch, MP3, thermometer, instruments, DIY projects, etc.

A TCS3200 Sensor

The TCS3200 is a full featured RGB color sensor with 4 built-in LEDs and can detect an almost infinite range of colors. Its applications are various such as measuring ambient light, color classification etc. Internally the sensor has an array of small phototransistors each with several color filters, allowing it to be quite accurate and sensitive. The sensor output returns a pulse of duration proportional to the intensity of the detected color.

Features:

Power: 2.7V to 5.5V

Salida digital TTL

Programmable scale and filters

Power down function

Size: 28.4×28.4mm

Manual–> TCS3200 TCS3210

PCB

Download the PCB

Electronic pcb diagram

Circuit with PCB

Code

Source code

C/C++

#include <U8g2lib.h> // Librería para manejar el display OLED
// Pines de control del sensor de color TCS3200
#define S0 4
#define S1 5
#define S2 6
#define S3 7
#define sensorOut 12 // Pin de salida del sensor de color

// Configuración del display OLED (modelo SH1106, 128x64, I2C)
U8G2_SH1106_128X64_NONAME_F_HW_I2C oled(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

int frequency = 0; // Variable para almacenar la frecuencia leída del sensor

void setup() {
  // Configuración de los pines del sensor como entradas/salidas
  pinMode(S0, OUTPUT);
  pinMode(S1, OUTPUT);
  pinMode(S2, OUTPUT);
  pinMode(S3, OUTPUT);
  pinMode(sensorOut, INPUT);

  // Configuración de la escala de frecuencia del sensor
  digitalWrite(S0, HIGH); // Escala del 20% de frecuencia
  digitalWrite(S1, LOW);

  // Inicializar el OLED
  oled.begin();
  oled.clearBuffer();
  oled.setFont(u8g2_font_ncenB08_tr); // Fuente básica para el OLED
  oled.drawStr(0, 12, "Sensor de Color"); // Mensaje inicial
  oled.sendBuffer();

  // Inicializar la comunicación Serial
  Serial.begin(9600);
}

void loop() {
  int red, green, blue; // Variables para almacenar las mediciones RGB

  // Leer componente rojo
  digitalWrite(S2, LOW);  // Configuración del filtro rojo
  digitalWrite(S3, LOW);
  frequency = pulseIn(sensorOut, LOW); // Medir frecuencia del pulso
  red = frequency;

  // Leer componente verde
  digitalWrite(S2, HIGH); // Configuración del filtro verde
  digitalWrite(S3, HIGH);
  frequency = pulseIn(sensorOut, LOW); // Medir frecuencia del pulso
  green = frequency;
 
  // Leer componente azul
  digitalWrite(S2, LOW);  // Configuración del filtro azul
  digitalWrite(S3, HIGH);
  frequency = pulseIn(sensorOut, LOW); // Medir frecuencia del pulso
  blue = frequency;

  // Mostrar valores RGB en el monitor serial
  Serial.print("R: ");
  Serial.print(red);
  Serial.print(" G: ");
  Serial.print(green);
  Serial.print(" B: ");
  Serial.println(blue);

  // Determinar el color dominante basado en las mediciones RGB
  String colorDetectado;
 if(red < 20 || green < 20|| blue < 20){
    colorDetectado = "Indefinido";
    }else
  if (red < green && red < blue) {
    colorDetectado = "Rojo";
  } else if (green < red && green < blue) {
    colorDetectado = "Verde";
  } else if (blue < red && blue < green) {
    colorDetectado = "Azul";
  }
  
  Serial.println(colorDetectado);

  // Mostrar el color detectado en el dosplay OLED
  oled.clearBuffer(); // Limpiar el buffer del OLED
  oled.setFont(u8g2_font_ncenB08_tr); // Establecer la fuente
  oled.drawStr(0, 12, "Sensor de Color"); // Mensaje principal
  oled.setCursor(0, 30); // Posición para el texto
  oled.print("Color: ");
  oled.print(colorDetectado); // Escribir el color detectado
  oled.sendBuffer(); // Enviar datos al OLED

  delay(1000); // Esperar antes de la próxima medición
}

Dec 18,2024

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Color Detector with Arduino and OLED display

n this tutorial we will show you how to build a color detector using the TCS3200 sensor and an SH1106 OLED display.

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Published: Dec 18,2024

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