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LDR Sensor Module - Light Dependent Resistor Module for Arduino, ESP32 & Raspberry Pi
Detect ambient light levels with precision using this LDR Sensor Module from The Engineer Store, Bengaluru. Built around a high-sensitivity photoresistor (Light Dependent Resistor), this module provides both digital (D0) and analog (A0) outputs, making it incredibly versatile for automatic lighting systems, smart home projects, and environmental monitoring. The onboard potentiometer lets you fine-tune the light detection threshold, while the LM393 comparator ensures clean, stable digital signals. Fast shipping across India with 7-day warranty on manufacturing defects and dedicated technical support.
Specifications
| Type | Light Sensor / Photoresistor Module |
| Sensing Element | LDR (Light Dependent Resistor / Photoresistor) |
| Comparator IC | LM393 Dual Comparator |
| Operating Voltage | 3.3V - 5V DC |
| Output Types | Digital Output (D0) + Analog Output (A0) |
| Digital Output | High/Low (threshold adjustable via potentiometer) |
| Analog Output | Variable voltage proportional to light intensity |
| Threshold Adjustment | Onboard potentiometer (trimpot) |
| Indicator LEDs | Power LED + Digital Output Status LED |
| LDR Resistance Range | ~1kOhm (bright light) to ~10MOhm (darkness) |
| Pin Configuration | VCC, GND, D0 (Digital), A0 (Analog) - 4 pins |
| PCB Dimensions | Approx. 32mm x 14mm |
| Mounting | Bolt hole for secure installation |
| Compatibility | Arduino, ESP32, ESP8266, Raspberry Pi, STM32, PIC, and all microcontrollers |
| Origin | Original / Authentic Module |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Why Choose This LDR Sensor Module?
- Dual Output Flexibility: Use the digital output (D0) for simple light/dark detection or the analog output (A0) for precise light intensity measurement - one module, two modes.
- Adjustable Sensitivity: Onboard potentiometer allows you to set the exact light threshold for digital switching, adapting to any environment without code changes.
- LM393 Comparator Onboard: Delivers clean, noise-free digital output signals with fast response time - no false triggers or jittery readings.
- Wide Voltage Compatibility: Operates at both 3.3V and 5V, making it plug-and-play with Arduino Uno, Nano, ESP32, ESP8266, Raspberry Pi Pico, and virtually any microcontroller.
- Visual Status Indicators: Power LED confirms the module is active; output LED shows the digital trigger state in real-time - debug without a multimeter.
- Breadboard & Project Friendly: Standard 4-pin header (VCC, GND, D0, A0) connects directly to breadboards and jumper wires for rapid prototyping.
- Compact & Mountable: Ultra-small PCB footprint with a mounting hole for permanent installation in enclosures, panels, or outdoor housings.
- 100% Authentic: Sourced from trusted component suppliers with quality-tested LDR elements and genuine LM393 ICs.
- Fast Shipping: 1-5 day shipping, 7-8 day delivery across India from our Bengaluru warehouse; same-day dispatch for local orders.
- Expert Support Included: Full technical assistance with wiring diagrams, sample code, and troubleshooting via email and WhatsApp.
How the LDR Sensor Module Works
The core of this module is a Light Dependent Resistor (LDR) - a passive component whose electrical resistance decreases as light intensity increases. In bright conditions, the LDR resistance drops to as low as a few hundred ohms; in complete darkness, it rises to several megaohms. This resistance change is converted into a measurable voltage through a voltage divider circuit on the PCB.
The analog output (A0) provides this raw voltage directly, giving you a continuous reading proportional to ambient light - perfect for data logging, dimming controls, or light intensity graphs. The digital output (D0) passes through the LM393 comparator, which compares the LDR voltage against a reference voltage set by the onboard potentiometer. When light drops below your set threshold, D0 goes HIGH (or LOW, depending on configuration), triggering an event - ideal for automatic street lights, day/night switches, or alarm systems.
Pin Configuration
| VCC | Power supply input (3.3V or 5 |
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy LDR sensor Module Online in India
Purchase the LDR sensor Module online at The Engineer Store - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on LDR sensor Module with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy LDR sensor Module at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.
LDR Sensor Module - Light Dependent Resistor Module for Arduino, ESP32 & Raspberry Pi
Detect ambient light levels with precision using this LDR Sensor Module from The Engineer Store, Bengaluru. Built around a high-sensitivity photoresistor (Light Dependent Resistor), this module provides both digital (D0) and analog (A0) outputs, making it incredibly versatile for automatic lighting systems, smart home projects, and environmental monitoring. The onboard potentiometer lets you fine-tune the light detection threshold, while the LM393 comparator ensures clean, stable digital signals. Fast shipping across India with 7-day warranty on manufacturing defects and dedicated technical support.
Specifications
| Type | Light Sensor / Photoresistor Module |
| Sensing Element | LDR (Light Dependent Resistor / Photoresistor) |
| Comparator IC | LM393 Dual Comparator |
| Operating Voltage | 3.3V - 5V DC |
| Output Types | Digital Output (D0) + Analog Output (A0) |
| Digital Output | High/Low (threshold adjustable via potentiometer) |
| Analog Output | Variable voltage proportional to light intensity |
| Threshold Adjustment | Onboard potentiometer (trimpot) |
| Indicator LEDs | Power LED + Digital Output Status LED |
| LDR Resistance Range | ~1kOhm (bright light) to ~10MOhm (darkness) |
| Pin Configuration | VCC, GND, D0 (Digital), A0 (Analog) - 4 pins |
| PCB Dimensions | Approx. 32mm x 14mm |
| Mounting | Bolt hole for secure installation |
| Compatibility | Arduino, ESP32, ESP8266, Raspberry Pi, STM32, PIC, and all microcontrollers |
| Origin | Original / Authentic Module |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Why Choose This LDR Sensor Module?
- Dual Output Flexibility: Use the digital output (D0) for simple light/dark detection or the analog output (A0) for precise light intensity measurement - one module, two modes.
- Adjustable Sensitivity: Onboard potentiometer allows you to set the exact light threshold for digital switching, adapting to any environment without code changes.
- LM393 Comparator Onboard: Delivers clean, noise-free digital output signals with fast response time - no false triggers or jittery readings.
- Wide Voltage Compatibility: Operates at both 3.3V and 5V, making it plug-and-play with Arduino Uno, Nano, ESP32, ESP8266, Raspberry Pi Pico, and virtually any microcontroller.
- Visual Status Indicators: Power LED confirms the module is active; output LED shows the digital trigger state in real-time - debug without a multimeter.
- Breadboard & Project Friendly: Standard 4-pin header (VCC, GND, D0, A0) connects directly to breadboards and jumper wires for rapid prototyping.
- Compact & Mountable: Ultra-small PCB footprint with a mounting hole for permanent installation in enclosures, panels, or outdoor housings.
- 100% Authentic: Sourced from trusted component suppliers with quality-tested LDR elements and genuine LM393 ICs.
- Fast Shipping: 1-5 day shipping, 7-8 day delivery across India from our Bengaluru warehouse; same-day dispatch for local orders.
- Expert Support Included: Full technical assistance with wiring diagrams, sample code, and troubleshooting via email and WhatsApp.
How the LDR Sensor Module Works
The core of this module is a Light Dependent Resistor (LDR) - a passive component whose electrical resistance decreases as light intensity increases. In bright conditions, the LDR resistance drops to as low as a few hundred ohms; in complete darkness, it rises to several megaohms. This resistance change is converted into a measurable voltage through a voltage divider circuit on the PCB.
The analog output (A0) provides this raw voltage directly, giving you a continuous reading proportional to ambient light - perfect for data logging, dimming controls, or light intensity graphs. The digital output (D0) passes through the LM393 comparator, which compares the LDR voltage against a reference voltage set by the onboard potentiometer. When light drops below your set threshold, D0 goes HIGH (or LOW, depending on configuration), triggering an event - ideal for automatic street lights, day/night switches, or alarm systems.
Pin Configuration
| VCC | Power supply input (3.3V or 5 |
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy LDR sensor Module Online in India
Purchase the LDR sensor Module online at The Engineer Store - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on LDR sensor Module with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy LDR sensor Module at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.