Arduino Beginner Experiments: Arduino and Light Blocking Sensor

HELLO THERE!!!

    How are you guys? I hope everyone is fine and in a good mood always. This week, I would like to share with you guys my experiment on Arduino and Light Blocking Sensor. The objective of this experiment is to receive feedback from the sensor ( Digital and Analog)


What is Light Blocking Sensor?

     A linear hall sensor is a type of sensor which responds when the sensor is blocked out from light. The sensor is different for LDR's as LDR's responds to the amount of light it received while the light blocking sensor responds if the light is blocked out or not from the sensor.It can be used for both digital and analog measurements.


HARDWARE:
1.Arduino UNO

2. Light Blocking Sensor

SOFTWARE:

1.Arduino IDE

CIRCUIT ASSEMBLY

 Let's refer to the image of the blocking sensor below:

The Connection of the Sensor to the Arduino is shown below:

SENSOR  ----->       ARDUINO

Signal      ------>     Any Analog/Digital pin

+5V         ------>     5V 

Ground    ------>     GND

CODING THE ARDUINO

      I am going to show you guys the codes for both digital and analog readings for the light blocking sensor:

Digital:

int led=13; //initializing led pin in digital pin 13

int hals=8;// initializing hall sensor in digital pin 8

void setup() {

pinMode(led, OUTPUT);// defining led as OUTPUT

Serial.begin(9600);//serial communication at 9600 bps

}

void loop() {

 if (digitalRead(hals)== HIGH) // read the digital value sensor and if the sensor value is high

 {

  digitalWrite(led,HIGH); //turn on the led 

  Serial.println("HIGH");//print out "HIGH"

 }

  if (digitalRead(hals)== LOW)// read the digital value sensor and if the sensor value is high

 {

  digitalWrite(led,LOW);//turn of the led

  

 }

}

Sample Output for Digital Reading

Analog:

int led=13; //initializing led pin in digital pin 13

int hals=0;// initializing hall sensor in analog pin 0

int val;

void setup() {

pinMode(led, OUTPUT);// defining led as OUTPUT

Serial.begin(9600);//serial communication at 9600 bps

}

void loop() {

val = analogRead(hals); //Analog read the sensor

Serial.println(val);//print out the value

}

Sample Output for Analog Reading

  Upload the code to the Arduino and let it run. Test the sensor by placing a small object (key, paper and etc.) into the U-shaped hole of the sensor. A demo video is shown below: