LDR Light Sensor Module for Arduino & STEM Projects

LDR Light Sensor Module for Arduino & STEM Projects

The LDR Light Sensor Module is an easy-to-use electronic sensor that detects
ambient light levels using a Light Dependent Resistor (LDR). As the surrounding light changes,
the sensor output changes accordingly, allowing students to understand how light intensity
can be measured electronically.

This module is based on the LM393 comparator, which converts light intensity
into a clear digital signal. The onboard potentiometer allows users to adjust the sensitivity
and set a custom trigger level based on brightness.

Students can use this sensor to build projects such as automatic street lights,
light-activated alarms, smart room lighting, and day–night detection systems.
It is an excellent component for introducing real-world sensing concepts in STEM education.

What Students Will Learn

• How LDR sensors respond to light intensity
• Basics of ambient light detection
• Using comparator-based digital outputs
• Adjusting sensor sensitivity using a potentiometer
• Interfacing sensors with microcontrollers

Technical Specifications

• Operating Voltage: 3.3V to 5V DC
• Operating Current: Approx. 15 mA
• Sensor Type: LDR (Light Dependent Resistor)
• Comparator IC: LM393
• Output Type: Digital (0V to 5V)
• Sensitivity Adjustment: Onboard potentiometer
• Indicators: Power LED and Output LED
• Compatibility: Arduino and Arduino-compatible boards
• Programming Platforms: Arduino IDE, MicroPython, mBlock, and others

Recommended For

• Age group: 10 years and above
• Beginner-level electronics and robotics learners
• School science projects and STEM labs
• Workshops and DIY learning at home

Safety & Usage Notes

• Adult supervision recommended for younger students
• This is an educational electronic component, not a toy
• Operate within the recommended voltage range

What’s Included in the Box

• 1 × LDR Light Sensor Module