Introduction
Photoresistor Sensor Module are sensors that allow you to detect light. They are small, inexpensive, low-power, easy to use and don’t wear out. For that reason they often appear in toys, gadgets and appliances.
Features
- Using sensitive photosensitive resistance sensor
- The comparator output signal is clean, good waveform, driving ability, more than 15mA.
- With adjustable potentiometer to adjust the brightness of the light detection
- The working voltage 3.3V-5V
- The output form: DO digital switching outputs (0 and 1) and AO analog voltage output
- A fixed bolt holes for easy installation
- PCB Size: 3.2cm x 1.4cm
- Using a wide voltage LM393 comparator
How to use with Arduino?
Connection
Code Upload
Copy below code to your IDE, choose the correct port and board for your Basic board, save and upload it to the Basic board.
int photocellPin = A0; // select the input pin for the photoresistor
int val = 0; // variable to store the value coming from the sensor
void setup() {
Serial.begin(9600);//Set the baudrate to 9600,make sure it's same as your software settings
// pinMode(ledPin, OUTPUT); // declare the ledPin as an OUTPUT
pinMode(photocellPin, INPUT); // declare the ledPin as an OUTPUT
}
void loop() {
val = analogRead(photocellPin); // read the value from the sensor
Serial.println(val); //The serial will print the light value
}
Running Result
After compile this sketch, simply click the “Upload” button in the environment. Wait a few seconds – you should see the RX and TX leds on the board flashing. If the upload is successful, the message “Done uploading.” will appear in the status bar.
In the same time,change the brightness of the environment, open the Serial Monitor and you will get the output data as below :
TEST OK
HARDWARE :
Osoyoo UNO Board (Fully compatible with Arduino UNO rev.3) x 1
Photoresistor Sensor Module x 1
M/M jumpers
USB Cable x 1
PC x 1
Pin Definitions :
VCC : ⇔ UNO 5V
GND : ⇔ UNO GND
A0 : ⇔ UNO A0
Mixly source :
volatile int val;
void setup()
{
Serial.begin(9600);
pinMode(A0, INPUT);
val = 0;
}
void loop()
{
val = analogRead(A0);
Serial.println(val);
delay(1000);
}