Color Sensor.pptx

This PPT is about color sensors.

1. COLOR SENSORS

2. INDEX INDEX INTRODUCTION WHAT IS A SENSOR? WHAT IS A COLOR SENSOR? WORKING PRINCIPLE APPLICATIONS EXAMPLES INTERFACE WITH ARDUINO ‹#›

3. INTRODUCTION Date ‹#› We live in a World of Sensors. You can find different types of Sensors in your homes, offices, cars etc. working to make our lives easier by turning on the lights by detecting our presence, adjusting the room temperature, detect smoke or fire, make us delicious coffee, open garage doors as soon as our car is near the door and many other tasks.

4. WHAT IS SENSORS? A sensor is a device that produces an output signal for the purpose of sensing a physical phenomenon. In the broadest definition, a sensor is a device, module, machine, or subsystem that detects events or changes in its environment and sends the information to other electronics, frequently a computer processor. Date Your Footer Here ‹#›

5. SENSORS Date Your Footer Here ‹#›

6. WHAT IS COLOR SENSORS? A colour sensor is a type of "photoelectric sensor" which emits light from a transmitter, and then detects the light reflected back from the detection object with a receiver. A colour sensor can detect the received light intensity for red, blue and green respectively, making it possible to determine the colour of the target object. Color sensors detect RGB values by receiving ambient light using a photodiode. Date Your Footer Here ‹#›

7. WORKING PRINCIPLE ‹#› Colour sensors contain a white light emitter to illuminate the surface. Three filters with wavelength sensitivities at 580nm, 540nm, 450nm to measure the wavelengths of red, green and blue colors respectively. Based on the activation of these filters, the color of the material is categorized. A light to voltage converter is also present in the sensor. The sensor responds to color by generating a voltage proportional to the detected color.

8. ‹#› WORKING PRINCIPLE

9. APPLICATIONS Colour sensors are applied to measure, detect the color of the surfaces. These sensors have a wide range of applications in industrial, medical and security systems. Some of the applications are the light color temperature measurement, RGB LED consistency control, medical diagnosis systems, health fitness systems, industrial process control, etc Colour sensors are majorly used to grade coloured products, distinguish coded markings detect the presence of adhesives or data codes on a package. The technology has a wide range of applications in various industries such as textile, automation, automotive, food, printing, pharmaceutical, and many more. ‹#›

10. ‹#› TCS3200 EXAMPLES In the TCS3200, the light-to-frequency converter reads an 8 x 8 array of photodiodes. 16 photodiodes have blue filters, 16 photodiodes have green filters, 16 photodiodes have red filters, and 16 photodiodes are clear with no filters.

11. ‹#›

12. The TCS3200 and TCS3210 programmable color light-to-frequency converters that combine configurable silicon photodiodes and a current-to-frequency converter on a single monolithic CMOS integrated circuit. The output is a square wave (50% duty cycle) with frequency directly proportional to light intensity (irradiance). The full-scale output frequency can be scaled by one of three preset values via two control input pins. Digital inputs and digital output allow direct interface to a microcontroller or other logic circuitry. Output enable (OE) places the output in the high-impedance state for multiple-unit sharing of a microcontroller input line. ‹#›

13. ‹#› AS73211 EXAMPLES The AS73211 is a low power, low noise integrated color sensor. Three channels convert light signals via photodiodes to a digital result and realize a continuous or triggered measurement.

14. ‹#›

15. ‹#› SEN-11195 EXAMPLES They can be complicated to interface to since RGB data often has to be derived using complex signal processing. Secondly, they’re less than rugged, and when you want to deploy one in the field you need a device that can stand up to the weather. Even moisture in the air can make an unprotected sensor unreliable.

16. ‹#› Atlas solved these problems by embedding the light sensor in a rugged housing below a layer of transparent epoxy which protects the sensor from moisture while still allowing light to get in. The resulting light probe is water- and dust-proof, sleet and ice tolerant, non reactive in salt water and will readily sink when submerged.

17. To communicate with the sensor we don't need anything other than five GPIO pins of the Arduino, and that is why we have used GPIO 8,7,6,5,4 pins of the Arduino. To power the sensor we have used the 5V and Ground pins of the Arduino Board. The TCS3200 Color Sensor module has 8 pins; those are VCC, OUT, S3, S2, S1, S0, 0E, and GND. All the pins of this sensor module are digital, except VCC and Gro und. ‹#› INTERFACE WITH ARDUINO

18. ‹#›

19. // Initialize the variables int redValue = 0; int greenValue = 0; int blueValue = 0; void setup() { // Set the pins for the color sensor module pinMode(S0, OUTPUT); pinMode(S1, OUTPUT); pinMode(S2, OUTPUT); pinMode(S3, OUTPUT); pinMode(OUT, INPUT); // Set the frequency scaling to 20% digitalWrite(S0, HIGH); digitalWrite(S1, LOW); // Print the headers for the serial output Serial.begin(9600); Serial.println("Color"); } void loop() { // Set the color sensor to detect red light digitalWrite(S2, LOW); digitalWrite(S3, LOW); delay(10); // Read the red value redValue = pulseIn(OUT, LOW); // Set the color sensor to detect green light digitalWrite(S2, HIGH); digitalWrite(S3, HIGH); delay(10); // Read the green value greenValue = pulseIn(OUT, LOW); // Set the color sensor to detect blue light digitalWrite(S2, LOW); digitalWrite(S3, HIGH); delay(10); // Read the blue value blueValue = pulseIn(OUT, LOW); // Determine the color based on the RGB values if (redValue > greenValue && redValue > blueValue) { Serial.println("Red"); } else if (greenValue > redValue && greenValue > blueValue) { Serial.println("Green"); } else if (blueValue > redValue && blueValue > greenValue) { Serial.println("Blue"); } else if (redValue > 200 && greenValue > 200 && blueValue > 200) { Serial.println("White"); } else if (redValue < 50 && greenValue < 50 && blueValue < 50) { Serial.println("Black"); } else { Serial.println("Unknown"); } // Wait for a short period before taking the next measurement delay(1000); } // Define the pins for the color sensor module #define S0 2 #define S1 3 #define S2 4 #define S3 5 #define OUT 6

20. REFERENCE TCS3200, TCS3210 PROGRAMMABLE COLOR LIGHT-TO-FREQUENCY CONVERTER Texas Advanced Optoelectronic Solutions Inc. https://www.mouser.com/datasheet/2/588/AS73211_DS000556_3-01-1366202.pdf https://cdn-shop.adafruit.com/datasheets/TCS34725.pdf https://core-electronics.com.au/color-detector-sensor.html https://www.keyence.co.in/ss/products/sensor/sensorbasics/color/info/ ‹#›