How to Use a Photoresistor!

Learn how to use a photoresistor in a matter of minutes!

Mar 11, 2022

•

130149 views

•

5 respects

environmental sensing

sensors

photoresistor

Devices & Components

Arduino Uno Rev3

LED (generic)

Jumper wires (generic)

Resistor 10k ohm

Photo resistor

Breadboard (generic)

Software & Tools

Arduino IDE

Project description

Code

sketch_mar11a.ino

arduino

This code basically checks if electricity is running through the photoresistor, and if there is, it should turn on the LED.

1int ledPin = 2;
2
3void setup() {
4    Serial.begin(9600);
5    pinMode(ledPin,  OUTPUT);
6}
7
8void loop() {
9    int value = analogRead(A0);
10
11    Serial.println("Analog  Value: ");
12    Serial.println(value);
13    
14    if (value > 450) {
15        digitalWrite(ledPin, LOW);
16    } else {
17        digitalWrite(ledPin,  HIGH);
18    }
19    
20    delay(250);
21}
22

int ledPin = 2;

void setup() {
    Serial.begin(9600);
    pinMode(ledPin,  OUTPUT);
}

void loop() {
    int value = analogRead(A0);

    Serial.println("Analog  Value: ");
    Serial.println(value);
    
    if (value > 450) {
        digitalWrite(ledPin, LOW);
    } else {
        digitalWrite(ledPin,  HIGH);
    }
    
    delay(250);
}

Downloadable files

Circuit Diagram

Wire up your circuits like this, and you should be good to go.

Circuit Diagram

Wire up your circuits like this, and you should be good to go.

Circuit Diagram

Comments

Only logged in users can leave comments

tropicalbean

0 Followers

•

0 Projects

Intro