Reed Switch Sensor Module - Magnetic Detection Switch for DIY Electronics
Reed Switch Sensor Module ā Digital Magnetic Contact Switch, 3.3ā5V
The Reed Switch Sensor Module is a magnetic detection switch that outputs a digital signal when a magnetic field is present. It uses a reed switch and LM393 comparator to provide a clean HIGH/LOW signal to your microcontroller. Ideal for door/window sensors, position detection, and contactless switching in DIY electronics projects.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 3.3Vā5V DC |
| Output Type | Digital (HIGH/LOW) |
| Switch Type | Normally Open (NO) |
| Detection Range | Up to 15mm (with standard magnet) |
| Comparator IC | LM393 |
| Dimensions | 32mm x 14mm |
What You Can Build With This
- Magnetic door/window alarm system
- Bicycle or motorcycle speedometer
- Proximity sensor for robotic arm
- Liquid level detector using floating magnet
Compatibility
This module works with any 3.3V or 5V system including Arduino Uno, Mega, Nano, ESP32, ESP8266, Raspberry Pi, and STM32 boards. It connects directly to a digital input pin; no analog conversion needed. Often paired with a magnet for non-contact detection.
Wiring Notes
Connect VCC to 3.3V or 5V, GND to ground, and DO (digital output) to any digital pin. A built-in LED indicates output state. No pull-up resistor required; the module handles signal conditioning.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, it outputs a digital signal that can be read by any digital pin on Arduino boards. Simply power the module with 5V and connect DO to a pin like D2.
What is the maximum detection distance?
The detection range depends on the strength of your magnet. With the included standard magnet, you can expect reliable switching up to 15mm away.
Can I use this for a door sensor?
Absolutely. Place the module on the frame and a magnet on the door. When the magnet moves away, the output goes HIGH, triggering your alert system.
š¦ Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document ā step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this ā it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ā¹75 for orders up to ā¹999, FREE shipping above ā¹999
- COD Orders: ā¹125 shipping + ā¹50 COD fee = ā¹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items