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Reed Switch Module-DIgital Output With LM393

SKU: 9Y0OC418QR
★★★★ ★ ★
4.1 (138 reviews)
The Reed Switch Module with LM393 Comparator is a magnetic field detection module designed to detect the presence or absence of a nearby magnet. It combines a high-quality normally open (NO) reed switch with an LM393 voltage comparator, providing a clean and stable digital output for microcontroller-based applications. When a magnetic field is brought close to the reed switch, the...
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The Reed Switch Module with LM393 Comparator is a magnetic field detection module designed to detect the presence or absence of a nearby magnet. It combines a high-quality normally open (NO) reed switch with an LM393 voltage comparator, providing a clean and stable digital output for microcontroller-based applications.

When a magnetic field is brought close to the reed switch, the internal contacts close, causing the LM393 comparator to change the output state. An onboard potentiometer allows users to adjust the trigger sensitivity, ensuring reliable operation under different magnetic field strengths. The module also includes power and status LEDs for easy monitoring.

The module is ideal for door and window security systems, magnetic proximity sensing, position detection, industrial automation, robotics, speed detection, and smart home applications. It interfaces easily with Arduino, ESP32, STM32, Raspberry Pi Pico, AVR, PIC, and other microcontroller platforms.

Key Features

  • High-quality normally open reed switch
  • Built-in LM393 voltage comparator
  • Digital TTL output
  • Adjustable trigger sensitivity
  • Detects the presence of magnetic fields
  • Fast response time
  • Low power consumption
  • Stable and reliable switching
  • Onboard power and detection LEDs
  • Compact PCB module design
  • Easy microcontroller interfacing
  • Compatible with Arduino, ESP32, STM32, and Raspberry Pi
  • Suitable for security and automation systems
  • Ideal for educational and DIY electronics projects

Shipping & Returns

Orders placed before 3 PM IST will be shipped on the same day (excluding Sundays and Public holidays) through our shipping partners. In rare cases, the pickup may get delayed during Public holidays / Bandh / Environmental disturbances.

Specifications

Specifications:

Module Type: Reed Switch Magnetic Sensor Module
Sensor Type: Normally Open Reed Switch
Comparator IC: LM393
Detection Principle: Magnetic Contact Switching
Operating Voltage: 3.3V to 5V DC
Operating Current: Less Than 15mA
Output Type: Digital Output (DO)
Output Logic: TTL Compatible
Sensitivity Adjustment: Onboard Potentiometer
Detection Distance: Approximately 10mm to 30mm (Depends on Magnet Strength and Orientation)
Switch Type: Normally Open (NO) Reed Switch
Response Time: Fast Response
Indicator LEDs: Power LED and Detection LED
Interface Pins: VCC, GND, DO
Operating Temperature: -20°C to +70°C
Storage Temperature: -40°C to +85°C
PCB Dimensions: Approximately 32mm × 14mm
Mounting Type: Through-Hole Module
Compatibility: Arduino, ESP32, STM32, Raspberry Pi Pico, AVR, PIC

Additional Resources

Reed Switch.PDF

FAQ

1. What is the Reed Switch Module with LM393 Comparator used for?

The module is used to detect the presence of a magnetic field and is commonly used in door and window alarms, position sensing, robotics, industrial automation, and smart home applications.

2. How does the Reed Switch Module work?

The reed switch closes when a magnet is brought near it. The LM393 comparator processes this signal and provides a clean digital output that can be read by a microcontroller.

3. What is the purpose of the onboard potentiometer?

The potentiometer allows users to adjust the magnetic field trigger sensitivity, enabling reliable operation with different magnet strengths and detection distances.

4. Can the module be connected directly to Arduino and ESP32 boards?

Yes, the module operates from 3.3V to 5V and provides a TTL-compatible digital output, making it fully compatible with Arduino, ESP32, STM32, Raspberry Pi Pico, and other microcontrollers.

5. What is the advantage of using the LM393 comparator?

The LM393 comparator provides a stable, noise-resistant digital output with an adjustable trigger threshold, improving detection reliability compared to a reed switch used alone.