Generic LDR Dawn to Dusk Sensor Board with Relay | Automatic Light Detection Module | Customizable Threshold Control
₹149.00₹250.00 (price_including_tax) (-40%)
Achieve intelligent light automation effortlessly with this Dawn to Dusk Sensor Board. Transform any lighting system into an energy-saving, autonomous unit for security or convenience. Engineered for consistent performance, ensuring long-term operational integrity.
This LDR-relay module delivers robust, energy-efficient automated lighting control for diverse DIY and industrial applications reliably.
Reliably detects subtle ambient light changes, ensuring accurate, timely activation of connected systems.
Directly controls high-power loads, simplifying circuit design and robust system integration significantly.
User-adjustable sensitivity allows fine-tuning activation points for diverse environmental conditions precisely.
The Engineering Behind the Dawn to Dusk Sensor Module
This intelligent sensor board integrates a highly sensitive Light Dependent Resistor (LDR) with a robust relay, forming a complete autonomous switching solution. Its core architecture detects subtle shifts in ambient light, activating or deactivating connected electrical loads, thereby enabling automated control systems for lighting, security, or environmental monitoring without manual intervention.
Engineered for reliability, this module features a high-grade LDR for consistent light detection and a durable power relay capable of handling significant loads. The compact PCB design ensures ease of integration into various projects, offering a practical and long-lasting solution for both educational and industrial applications, emphasizing durability and stable performance under typical operating conditions.
Precision Photoconductive Sensing
At the heart of this module is a high-sensitivity LDR, which varies its resistance in proportion to the intensity of incident light. This precise photoconductive response allows the board to accurately differentiate between dawn, daylight, dusk, and darkness. The adjustable potentiometer on the board enables users to finely calibrate the light threshold, customizing the activation point to specific environmental requirements or desired operational timings.
Robust Integrated Relay Output
Unlike simple sensor outputs, this module incorporates a powerful onboard relay, directly providing a high-current switching capability. This eliminates the need for external driver circuits when controlling AC lamps, DC motors, or other power-hungry devices. The relay’s robust contacts ensure reliable switching, addressing common pain points related to handling inductive loads or high-voltage applications with a simplified, integrated design.
Optimized for Performance & Integration
- Module Type: Automatic Light Sensor Switch Module
- Sensor Component: High-Sensitivity LDR (Light Dependent Resistor)
- Output Control: Single-Channel SPDT (Single Pole Double Throw) Relay
- Operating Voltage: 5V to 12V DC (typical range)
- Max Relay Load: 10A @ 250VAC / 10A @ 30VDC
- Switch Threshold: Adjustable via Potentiometer
- Indicator: Power LED, Relay Status LED
- Connection Interface: Screw Terminal Blocks
Features & Benefits
- Automatic Light Sensing: Detects ambient light levels to autonomously trigger connected devices without manual input.
- Integrated High-Current Relay: Directly controls diverse electrical loads up to 10A, simplifying power switching.
- Adjustable Sensitivity Potentiometer: Fine-tune the light activation threshold for precise application requirements.
- Wide Operating Voltage Range: Compatible with common 5V to 12V DC power supplies for versatility.
- Dual Indicator LEDs: Provides visual feedback for power status and relay activation state.
- Easy Screw Terminal Connections: Ensures secure and straightforward wiring for rapid prototyping and deployment.
Pro-Grade Advantages
- Enables fully autonomous lighting control, improving energy efficiency and convenience.
- Integrated relay simplifies circuit design by handling high-current loads directly.
- Adjustable light sensitivity allows for precise customization to specific environmental needs.
- Robust construction ensures reliable operation in various DIY and professional applications.
Technical Considerations
- Lacks advanced smart features like timer functions or remote control, offering basic automation.
- Designed primarily for DC input power, limiting direct AC power source compatibility without conversion.
What is an LDR and how does it function in this module?
An LDR (Light Dependent Resistor) is a photoresistor whose resistance decreases with increasing light intensity. In this module, it acts as the primary sensor, detecting ambient light levels to trigger the relay at predefined thresholds.
What types of electrical loads can the integrated relay switch?
The onboard relay is rated for a maximum load of 10A at 250VAC or 10A at 30VDC. This allows it to control a wide range of devices such as LED lights, incandescent bulbs, small DC motors, solenoids, or other low-power appliances.
How do I adjust the light sensitivity or threshold for activation?
The module includes an onboard potentiometer that allows you to finely adjust the light sensitivity. Turning the potentiometer will change the resistance threshold at which the LDR triggers the relay, letting you set the desired dawn/dusk activation point.
What is the typical operating voltage for this sensor board?
This module typically operates within a DC voltage range of 5V to 12V. It requires a stable DC power source to energize the board and the relay coil effectively, ensuring consistent performance.
Can this module be used outdoors or in exposed environments?
While the module itself is designed for robust operation, it is not waterproof or weatherproof. For outdoor or exposed environment use, it must be housed within an appropriate IP-rated enclosure to protect it from moisture, dust, and extreme temperatures.
Does this module provide a normally open (NO) and normally closed (NC) output?
Yes, the integrated relay typically provides both Normally Open (NO) and Normally Closed (NC) contacts, along with a Common (COM) terminal. This allows for flexible wiring configurations, enabling the connected device to be either turned ON or OFF when the light threshold is met.
What applications are ideal for a dawn to dusk sensor module like this?
This module is ideal for automated outdoor lighting, security lights, garden lights, automatic gate lights, energy-saving systems, educational DIY projects, and any application requiring light-activated switching without manual intervention.
| Specification | Value |
|---|---|
| Module Type | Automatic Light Sensor Switch Module |
| Sensor Component | High-Sensitivity LDR |
| Output Control | Single-Channel SPDT Relay |
| Operating Voltage | 5V to 12V DC |
| Max Relay Load Current | 10 Amps |
| Max Relay Load Voltage | 250VAC / 30VDC |
| Switch Threshold | Adjustable via Potentiometer |
| Indicator LEDs | Power, Relay Status |
| Connection Type | Screw Terminal Blocks |
| Board Dimensions (L x W) | Approx. 50mm x 30mm |
Additional information
| Brand | Generic |
|---|---|
| Operating Voltage | 5V-12V DC |
| Sensor Type | Light Dependent Resistor (LDR) |
| Control Voltage | 5V-12V DC |
| Load Capacity | 10A @ 250VAC / 10A @ 30VDC |
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