Reed Switch Sensor Module LM393 Magnetic Detection Board Arduino

🔧 Reed Switch Sensor Module LM393 Magnetic Detection Board | AuscomTech

This reed switch sensor module is a compact magnetic detection board for Arduino and other microcontroller projects.

It uses a normally open reed switch with an LM393 comparator to provide a clean digital output when a magnet is detected nearby.

Typical uses include door sensors, window sensors, position detection, counting, limit sensing, and DIY automation projects.

⭐ Key Features

• Magnetic Detection – detects the presence of a nearby magnet using a normally open reed switch
• Digital Output – provides simple HIGH/LOW switching output for microcontrollers
• LM393 Comparator – helps produce a cleaner output signal with good drive capability
• 3.3V–5V Operation – suitable for Arduino and many compatible development boards
• Mounting Hole – fixed bolt hole allows easy installation in projects
• Compact PCB – small board size for embedded and space-limited builds

📊 Technical Specifications

• Sensor Type: Normally open reed switch
• Comparator IC: LM393
• Operating Voltage: 3.3V–5V DC
• Output Type: Digital switching output
• Output States: 0 and 1 logic output
• Output Drive Capability: greater than 15mA
• PCB Size: approx. 32 × 14mm
• Compatibility: Arduino, ESP32, ESP8266, Raspberry Pi Pico, and other microcontroller boards

🧩 Typical Applications

• Door and window magnetic sensing
• Security alarm projects
• Position detection
• Counting systems
• Limit switch replacement
• Robotics and automation
• Arduino DIY sensor projects

⚠️ Important Notes

• Requires an external magnet to trigger the reed switch.
• Magnet is not included unless specifically supplied with the selected kit.
• Output logic state may vary depending on wiring and controller pull-up configuration.
• Keep within the rated voltage range to avoid damaging the module.

📦 Package Includes

• 1 × Reed Switch Sensor Module

🔗 Recommended Accessories (Not Included)

• Arduino UNO – basic microcontroller testing and projects
• Jumper Wires – breadboard and module connections
• Breadboard – quick circuit prototyping
• Small Magnet – magnetic triggering and testing