Magnetic Reed Switch Sensor
Simple magnetic switch for door, window and cabinet status detection.
AI Ready Overview
Quick Summary
Reed Switch is a door contact sensor commonly used in FYP and embedded projects. It is best for door status and cabinet tamper, with wiring and testing planned around Arduino, ESP32, Raspberry Pi.
Difficulty
Beginner
Time Required
1-3 days for basic wiring and sample code; 1 week if used inside a complete FYP prototype
Cost
RM2-RM10 module range in Malaysia; full project cost depends on scope.
Components
Reed Switch, Arduino, ESP32, Raspberry Pi
Overview
What is Reed Switch?
Reed switches detect whether a magnet is near the sensor. They are simple, low-cost modules for door-open, cabinet tamper and parcel box status projects.
Engineering Reference
Quick Specs
| Operating Voltage | 3.3V / 5V |
|---|---|
| Interface | Digital |
| Difficulty | Beginner |
| Typical Malaysia Price | RM2-RM10 |
| Best For | Door status, Cabinet tamper |
Real Usage Notes
Suitable / Not Suitable
Suitable for
- ✓ Door status
- ✓ Cabinet tamper
- ✓ Parcel box detection
Not suitable for
- ✕ Distance measurement
- ✕ High-security certified access
- ✕ Heavy current switching
Build Planning
Difficulty
Reed Switch is rated Beginner. Plan around 1-3 days for basic wiring and sample code; 1 week if used inside a complete fyp prototypedepending on wiring, libraries, calibration, dashboard/app integration and testing evidence.
Build Planning
Time Required
1-3 days for basic wiring and sample code; 1 week if used inside a complete FYP prototype
Malaysia Price Guidance
Cost
Typical module price range: RM2-RM10. This is component guidance only; a complete FYP cost depends on controller, sensors, casing, display, app/dashboard, documentation and timeline.
Connections
Pinout
VCC
Power input. Check whether the module expects 3.3V or 5V before wiring.
GND
Common ground with the controller and external supply.
Digital
Main Digital connection used by the module.
IO
Additional signal pins depend on the exact module variant.
Platform Notes
Wiring Guides
Reed Switch with Arduino / ESP32
Connect power, ground and the Digital signal lines. Use level shifting when a 5V module connects to a 3.3V controller.
| Reed Switch VCC | 5V or module-rated supply |
|---|---|
| Reed Switch GND | Controller GND |
| Signal pins | Digital |
Fix Common Problems
Troubleshooting
Troubleshooting
Common Mistakes
FYP Ideas Using Reed Switch
Related Projects
Compare Options
Alternative Components
Student Questions
FAQ
Is Reed Switch good for FYP projects?
Yes, Reed Switch is suitable for FYP work when the project matches its limits: Door status and Cabinet tamper.
What is the most common Reed Switch mistake?
Wrong magnet alignment