Arduino UNO-Based Color Sensor and Proximity Detection System with TCS3200 and Inductive Sensor

This project is an advanced object detection and color identification system built using the Arduino Uno. It integrates a TCS3200 for color recognition and an inductive proximity sensor for metal object detection, making it ideal for industrial automation and smart sorting applications.

Components Used

Arduino Uno
TCS3200
Inductive Proximity Sensor
Breadboard
Resistors
LED Indicator
Jumper Wires
External Power Supply

How the System Works

1️⃣ Color Detection (TCS3200)

The TCS3200 color sensor detects the RGB values of an object placed in front of it.

The sensor converts light intensity into frequency signals.
The Arduino reads these frequency values.
Based on calibrated thresholds, the system identifies the object's color.

2️⃣ Proximity Detection (Inductive Sensor)

The inductive proximity sensor detects metal objects without physical contact.

When a metal object comes near the sensor, it generates a signal.
The Arduino processes the signal and triggers an LED or action.

3️⃣ Combined Operation

If a metal object is detected → proximity alert activates.
If a colored object is detected → color identification is processed.
The system can be expanded for automatic sorting or industrial conveyor systems.

Key Features

✔ Dual detection system (Color + Metal Detection)

✔ Contactless sensing technology

✔ Real-time LED indication

✔ Suitable for automation and smart manufacturing

✔ Expandable for conveyor-based sorting

Coding:

/*
  Arduino UNO-Based Color Sensor and Proximity Detection System
  This code interfaces with a TCS3200 color sensor and an inductive proximity
  sensor. The TCS3200 is used to detect colors, and the proximity sensor
  detects the presence of metallic objects. The system outputs the color
  detected and the proximity status to the serial monitor.
*/

#define S0 4
#define S1 5
#define S2 6
#define S3 7
#define sensorOut 8

void setup() {
  // Initialize serial communication
  Serial.begin(9600);

  // Set TCS3200 pins as outputs
  pinMode(S0, OUTPUT);
  pinMode(S1, OUTPUT);
  pinMode(S2, OUTPUT);
  pinMode(S3, OUTPUT);
  pinMode(sensorOut, INPUT);

  // Set frequency scaling to 20%
  digitalWrite(S0, HIGH);
  digitalWrite(S1, LOW);
}

void loop() {
  // Read color values
  int red = readColor(LOW, LOW);
  int green = readColor(HIGH, HIGH);
  int blue = readColor(LOW, HIGH);

  // Print color values
  Serial.print("R: ");
  Serial.print(red);
  Serial.print(" G: ");
  Serial.print(green);
  Serial.print(" B: ");
  Serial.println(blue);

  // Check proximity sensor status
  int proximityStatus = digitalRead(2); // Assuming proximity sensor is on D2
  if (proximityStatus == HIGH) {
    Serial.println("Metal detected");
  } else {
    Serial.println("No metal detected");
  }

  delay(1000); // Delay for readability
}

int readColor(int s2State, int s3State) {
  digitalWrite(S2, s2State);
  digitalWrite(S3, s3State);
  delay(100); // Allow sensor to stabilize
  return pulseIn(sensorOut, LOW);
}

Applications

Industrial object sorting systems
Smart manufacturing prototypes
Robotics competitions
STEM and engineering projects
Automated inspection systems

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