Digital Magnetic Reed Switch Sensor Module for Arduino & Micro:bit
Digital Magnetic Reed Switch Sensor Module for Arduino & Micro:bit
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Short Product Description
Short Product Description
Unlock the power of magnetic detection for your next electronics project. The Keyes Digital Reed Switch Module offers a reliable, non-contact way to detect magnetic fields. Featuring the high-quality MKA10110 green reed component and an integrated LED indicator, this module is perfect for DIY door alarms, limit switches, and STEM smart home projects. Plug-and-play compatible with Arduino, Micro:bit, and Raspberry Pi.
Key Features
Key Features
- High Sensitivity: Uses the premium MKA10110 green reed switch for fast and accurate magnetic field detection.
- Visual Feedback: Features dual LEDs—one for power (Red) and one for signal output (Green/Red) indicating when a magnet is detected.
- Safety First: Equipped with a strictly defined anti-reverse 3-pin connector (GND, VCC, Signal) to prevent short circuits during wiring.
- Wide Voltage Compatibility: Works perfectly with DC 3.3V to 5V, supporting both Arduino (5V) and ESP32/Micro:bit (3.3V) logic.
- Compact Design: Small footprint (34mm x 22mm) with a 3mm mounting hole for easy installation in tight enclosures.
- All-in-One Kit: Includes the sensor module and a dedicated 3-pin connector cable.
Full Product Description
Full Product Description
Reliable Magnetic Sensing Made Simple
Whether you are building a smart security system for your home or teaching a classroom of students about electromagnetism, the Keyes Digital Reed Switch Sensor Module is the essential component you need. Unlike raw glass reed switches that are fragile and hard to solder, this module comes pre-mounted on a durable PCB with all necessary circuitry included.
How It Works
At the heart of this module is the MKA10110 Green Reed Switch. Inside the sealed glass tube are two ferrous elastic reeds separated by a small gap. When a magnet approaches, the magnetic field lines magnetize the reeds, causing them to attract and touch. This closes the circuit (Signal goes High/Low depending on logic), lighting up the on-board LED and sending a digital signal to your microcontroller. When the magnet moves away, the reeds spring apart, breaking the circuit.
Built for Makers and Educators
We understand the frustration of confusing wiring. That’s why this module features a 3-pin anti-reverse interface. The included custom wire ensures you never plug it in backwards, protecting your sensor and your mainboard. It operates seamlessly between 3.3V and 5V, making it universally compatible with most modern development boards.
Common Applications
- Smart Home Security: Detect if windows or doors are opened.
- Position Sensing: Use as a limit switch for CNC machines or 3D printers.
- Speed Detection: Calculate RPM by attaching a magnet to a rotating wheel.
- Interactive Art: Trigger lights or sounds when an object is placed correctly.
Technical Specifications
Technical Specifications
- Model: Keyes Digital Reed Switch Module
- Sensor Type: MKA10110 green dry reed pipe
- Operating Voltage: DC 3.3V – 5V
- Output Type: Digital signal (High/Low)
- Interface: 3-pin anti-reverse, 2.54mm pitch
- Dimensions: 34mm × 22mm × 9mm
- Weight: 2.6g
- Mounting Hole: 3mm diameter
- Cable Length: ~200mm
Delivery Options
Delivery Options
- Local delivery within Hong Kong and in-store pickup.
- Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
- Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
- Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
- In-store pickup details (location and time) will be confirmed by email or phone message.
- Delivery times are estimates and may be affected by weather or unforeseen circumstances.
FAQ Section
FAQ Section
Q: Is this sensor "Normally Open" (NO) or "Normally Closed" (NC)?
A: The MKA10110 reed switch is typically Normally Open (NO). The circuit is disconnected (open) by default and connects (closes) only when a magnet is brought near the sensor.
Q: Do I need a resistor to use this with Arduino?
A: No, the Keyes module comes with the necessary pull-up/pull-down resistors and LEDs integrated onto the PCB. You can connect the signal pin directly to a digital I/O pin on your Arduino.
Q: What is the detection range of this sensor?
A: The detection range depends on the strength of the magnet you use. For a standard neodymium magnet, the detection distance is usually between 10mm to 20mm.
Target Users / Applications
Target Users / Applications
- STEM Educators & Students: Perfect for introducing digital inputs and magnetism.
- Hobbyists & Makers: Ideal for DIY alarm systems, speedometers, and inventory counters.
- Prototyping Engineers: Quick verification of mechanical positioning systems.
