Light Sensitive LDR Relay Module 5V

Light Sensitive LDR Relay Module 5V

The Light Sensitive LDR Relay Module 5V is a self-contained switching solution that uses an LDR sensor mounted on a 10-inch lead to detect ambient light levels and automatically energize or de-energize a relay at a user-adjustable threshold. It operates from a 5 V supply and includes both normally open (NO) and normally closed (NC) contacts for versatile use. The onboard LM393 comparator and indicator LED provide clear operation feedback. The potentiometer allows fine-tuning of the brightness trip point, and protection components such as a flyback diode and reverse polarity diode ensure reliable performance.

Features

• Automatically controls the relay based on ambient light intensity.
• Includes an LDR sensor with a 10″ lead for remote light detection.
• Adjustable threshold via potentiometer for customizable light sensitivity.
• Supports switching of 115/230 VAC or 0–15 VDC loads at up to 10 A.
• Provides both NO and NC relay contacts for flexible output configuration.
• Indicator LED lights when the relay is energized.
• Operates on a 5V power supply.
• Includes flyback and reverse-polarity protection diodes for safe operation.

PINOUT

Specifications

Applications

• Automatic night-light activation when ambient brightness drops below a preset level.
• Daylight-responsive lighting control for security systems.
• Flame detection under certain lighting conditions.
• Light-level triggered automation without the need for a microcontroller.

Package Contents

• 1x Light Sensitive LDR Relay Module 5V
• 1x LDR sensor on 10″ lead with connector.