LDR Module 3pin Photoresistor– Optical Sensitive Resistance Light Sensor Module

Name: LDR Module 3pin Photoresistor– Optical Sensitive Resistance Light Sensor Module
SKU: aa0124
Price: 30.00 EGP
Availability: InStock

SKU: aa0124 Categories: Light/Color Sensor, Sensors Tags: Light/Color Sensor, Sensors

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Description

<p>The resistance of 10mm GL12528 Light Sensitive Photoresistor LDR changes with the change in the ambient light exposed on the surface of the sensor. As the light on the sensor increases then the resistance across the two leads decreases. Light Dependent Resistor is a type of photocell which finds excellent use in light sensing device application, whether it is automatic outdoor light ON/OFF switch or indoor automatic light switch; moreover, the 10mm LDR or photoresistor sensor works best in both light and dark regions. The photo-resistors are a staple of electronics. If you need a way to sense the level of ambient light then there is no easier way to do it without an LDR/photo-resistor.</p> <p>Two Cadmium Sulphide PhotoConductive Cells with spectral responses similar to that of the human eye. Cell resistance falls with increasing light intensity. Applications of this product include smoke detection, automatic lighting control, batch counting, and burglar alarm systems. Furthermore, some of the applications are given below.</p> <p><strong> Analog Applications:</strong></p> <div> <ol> <li>Camera exposure control</li> <li>Auto slide focus – dual cell</li> <li>Photocopy machines – the density of the toner</li> <li>Colorimetric test Equipment</li> <li>Densitometer</li> <li>Electronics scales – dual cell</li> <li>Automatic gain control – modulated light source</li> <li>Automated rearview mirror</li> </ol> <p><strong>Digital Applications:</strong></p> </div> <div> <ol> <li>Automatic headlight dimmer</li> <li>Nightlight control</li> <li>Oil burner flame out</li> <li>Streetlight control</li> <li>Absence/presence (beam breaker)</li> <li>Position sensor</li> </ol> <p><strong>Other applications:</strong></p> <ol> <li>Annunciator</li> <li>Camera automatic photometry</li> <li>Electronic toy</li> <li>Industrial control</li> <li>Light control</li> <li>Light control lamp</li> <li>Photoelectric control</li> <li>Switch</li> </ol> </div> <p><strong>To know more about photo-resistor, click here. <a href=""http://www.resistorguide.com/photoresistor/"" target=""_blank"" rel=""noopener noreferrer"">What is photo-resistor?</a></strong></p> <div><hr /></div> <h4><strong>Features:</strong></h4> <ol> <li>Spectral peak: 560nm</li> <li>Maximum voltage: 250 VDC</li> <li>Maximum wattage: 200 mW</li> <li>Operating temperature: -30˚C ~ +70˚C</li> <li>Light resistance (10 Lux): 10-20 KΩ</li> <li>Dark resistance: 2 MΩ</li> <li>Resistance illumination: 3</li> <li>Response time: 20ms (Rise), 30ms (Down)</li> </ol> <hr /> <h4><strong>Package Includes :</strong></h4> <div>10mm GL12528 Light Sensitive Photoresistor LDR (2Pcs).</div>

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Pin Connections

1 Table

Pin Connections Table 1

Board	Sensor Pin	Connection
LDR Module	VCC/GND/AOUT	3.3-5V / GND / board analog pin

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LDR Module 3pin Photoresistor - Optical Sensitive Resistance Light Sensor Module

7 Examples • C/C++ | Boards: Arduino Uno, Arduino Nano, Arduino Mega, ESP32, ESP8266, STM32, Raspberry Pi Pico

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LDR Module 3pin Photoresistor - Optical Sensitive Resistance Light Sensor Module - Arduino Uno

LDR Module 3pin Photoresistor - Optical Sensitive Resistance Light Sensor Module - Arduino Nano

LDR Module 3pin Photoresistor - Optical Sensitive Resistance Light Sensor Module - Arduino Mega

LDR Module 3pin Photoresistor - Optical Sensitive Resistance Light Sensor Module - ESP32

LDR Module 3pin Photoresistor - Optical Sensitive Resistance Light Sensor Module - ESP8266

LDR Module 3pin Photoresistor - Optical Sensitive Resistance Light Sensor Module - STM32

LDR Module 3pin Photoresistor - Optical Sensitive Resistance Light Sensor Module - Raspberry Pi Pico

📄 File: ldr_module_3pin_photoresistor_-_optical_sensitive_resistance_light_sensor_module_-_arduino_uno.inoArduino Uno

519 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: A0 on Arduino Uno (ADC range 0-1023, reference 5.0V)

6#define LDR_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(LDR_PIN);

14 float voltage = raw * 5.0 / 1023.0;

16 Serial.print("Light reading (raw): "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw > 500 ? " -> Dark" : " -> Bright"); // tune the 500 threshold to your LDR/resistor pair

20 delay(300);

21}

📄 File: ldr_module_3pin_photoresistor_-_optical_sensitive_resistance_light_sensor_module_-_arduino_nano.inoArduino Nano

520 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: A0 on Arduino Nano (ADC range 0-1023, reference 5.0V)

6#define LDR_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(LDR_PIN);

14 float voltage = raw * 5.0 / 1023.0;

16 Serial.print("Light reading (raw): "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw > 500 ? " -> Dark" : " -> Bright"); // tune the 500 threshold to your LDR/resistor pair

20 delay(300);

21}

📄 File: ldr_module_3pin_photoresistor_-_optical_sensitive_resistance_light_sensor_module_-_arduino_mega.inoArduino Mega

520 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: A0 on Arduino Mega (ADC range 0-1023, reference 5.0V)

6#define LDR_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(LDR_PIN);

14 float voltage = raw * 5.0 / 1023.0;

16 Serial.print("Light reading (raw): "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw > 500 ? " -> Dark" : " -> Bright"); // tune the 500 threshold to your LDR/resistor pair

20 delay(300);

21}

📄 File: ldr_module_3pin_photoresistor_-_optical_sensitive_resistance_light_sensor_module_-_esp32.inoESP32

513 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: 34 on ESP32 (ADC range 0-4095, reference 3.3V)

6#define LDR_PIN 34

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(LDR_PIN);

14 float voltage = raw * 3.3 / 4095.0;

16 Serial.print("Light reading (raw): "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw > 500 ? " -> Dark" : " -> Bright"); // tune the 500 threshold to your LDR/resistor pair

20 delay(300);

21}

📄 File: ldr_module_3pin_photoresistor_-_optical_sensitive_resistance_light_sensor_module_-_esp8266.inoESP8266

515 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: A0 on ESP8266 (ADC range 0-1023, reference 3.3V)

6#define LDR_PIN A0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(LDR_PIN);

14 float voltage = raw * 3.3 / 1023.0;

16 Serial.print("Light reading (raw): "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw > 500 ? " -> Dark" : " -> Bright"); // tune the 500 threshold to your LDR/resistor pair

20 delay(300);

21}

📄 File: ldr_module_3pin_photoresistor_-_optical_sensitive_resistance_light_sensor_module_-_stm32.inoSTM32

515 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: PA0 on STM32 (ADC range 0-4095, reference 3.3V)

6#define LDR_PIN PA0

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(LDR_PIN);

14 float voltage = raw * 3.3 / 4095.0;

16 Serial.print("Light reading (raw): "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw > 500 ? " -> Dark" : " -> Bright"); // tune the 500 threshold to your LDR/resistor pair

20 delay(300);

21}

📄 File: ldr_module_3pin_photoresistor_-_optical_sensitive_resistance_light_sensor_module_-_raspberry_pi_pico.inoRaspberry Pi Pico

525 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// Analog pin: 26 on Raspberry Pi Pico (ADC range 0-4095, reference 3.3V)

6#define LDR_PIN 26

8void setup() {

9 Serial.begin(115200);

10}

12void loop() {

13 int raw = analogRead(LDR_PIN);

14 float voltage = raw * 3.3 / 4095.0;

16 Serial.print("Light reading (raw): "); Serial.print(raw);

17 Serial.print(" Voltage: "); Serial.print(voltage);

18 Serial.println(raw > 500 ? " -> Dark" : " -> Bright"); // tune the 500 threshold to your LDR/resistor pair

20 delay(300);

21}

Project Notes:

Analog light sensor (LDR voltage divider).

Specification

WeightWeight	6 g
Dimensions	1 × 1 × 0,5 cm
Product Name	Light Sensitive Photoresistor LDR 10mm
Sensor Type	Photoresistor (LDR)
Sensing Method	Light Dependent Resistance
Active Diameter	10 mm
Dark Resistance	High (≥1 MΩ)
Light Resistance	Low (10–20 kΩ @ 10 lux)
Response Type	Analog
Response Time	Moderate
Operating Voltage	Passive Component (No Polarity)
Operating Temperature	-30°C to +70°C
Package Type	Through Hole
Application	Light Detection, Automatic Lighting, Arduino Projects, DIY Electronics

Customer Reviews

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