The KY-024 Magnetic Sensor Module Leave a comment

The Ultimate Guide to the KY-024 Magnetic Sensor Module

The KY-024 linear magnetic Hall sensor module is a powerful and versatile tool in the world of electronics, widely used by hobbyists, students, and professionals alike. Whether you’re building a DIY security system, detecting magnetic fields, or experimenting with motion sensing, the KY-024 offers an easy and affordable way to bring your Arduino or Raspberry Pi projects to life.

In this comprehensive guide by Shop4Makers, we explore everything you need to know about the KY-024 — from its components and working principle to its top applications and how to use it effectively.

What is the KY-024 Sensor and How Does It Work?

The KY-024 is a Hall-effect based linear magnetic sensor module designed to detect the presence and strength of magnetic fields. At its core is a linear Hall sensor (49E) that outputs analog voltage proportional to the magnetic field strength it detects.

Key Components of KY-024:

• 49E Linear Hall-effect Sensor: Measures magnetic field strength.
• LM393 Comparator IC: Provides digital output signal.
• Potentiometer: Adjusts sensitivity for digital signal threshold.
• Status LEDs: Visual indicator of magnetic field detection.
• 4-pin Interface: VCC, GND, Digital Output (DO), Analog Output (AO)

How It Works:

When a magnet approaches the sensor, it influences the Hall sensor to output a corresponding analog voltage. The LM393 comparator can be tuned via the onboard potentiometer to trigger a digital HIGH or LOW depending on a set threshold. This dual output makes the KY-024 ideal for both analog readings and digital triggers.

7 Powerful Applications of the KY-024 Sensor Module

At Shop4Makers, we believe that the KY-024 is one of the most adaptable sensor modules available. Here are 7 powerful ways to use this device in your electronics projects:

1. Magnetic Field Detection Projects

This is the most basic yet useful application. The KY-024 allows you to measure the intensity of magnetic fields. It can be used in experiments to visualize how magnetic fields vary depending on distance and polarity.

Use case: Educational demonstrations in physics classes.

2. Speed and Proximity Detection

Install the KY-024 near rotating objects like motors or wheels with attached magnets. Each pass of a magnet changes the field detected, enabling speed measurement or proximity detection.

Use case: RPM counters, bicycle speedometers, fan monitoring systems.

3. Contactless Switches

By placing a magnet on a moving door, drawer, or container, the KY-024 can be used as a contactless switch. It detects when the magnet is near (closed) or far (open).

Use case: Smart home automation, security systems.

4. Magnetic Encoder Systems

Combine the KY-024 with a series of magnets to create a low-cost encoder. It helps determine position or rotation direction of mechanical systems.

Use case: Robotics, CNC systems, mechanical arms.

5. Magnetic Field Mapping

You can move the sensor in space and log its analog output to map magnetic fields in a room or around certain objects.

Use case: Detecting interference zones, magnetic field analysis.

6. Current Sensing in Wires

When placed near a wire carrying current, the KY-024 can detect the magnetic field generated. While not highly precise, it provides a basic idea of current flow.

Use case: Basic current sensing, overload detection.

7. Security and Tamper Detection

Hide a KY-024 inside enclosures or safes. Any unexpected magnetic activity, such as placing/removing a magnet, can trigger alarms or logs.

Use case: Anti-tamper systems, industrial safety mechanisms.

Additional Features and Benefits of KY-024

Dual Output Capability

With both analog and digital outputs, the K-024 allows flexibility in designing systems that require real-time feedback and threshold-based actions.

High Sensitivity

Adjustable sensitivity ensures it can be used in various environments and setups, whether detecting weak or strong magnetic fields.

Arduino and Raspberry Pi Compatible

Thanks to its 4-pin interface, the KY-024 is fully compatible with popular microcontrollers, including Arduino Uno, Nano, Mega, and Raspberry Pi.

How to Use the K-024 with Arduino

Even though this article doesn’t include code, the basic idea is simple:

• Connect VCC to 5V, GND to Ground.
• AO (Analog Output) goes to an analog input pin.
• DO (Digital Output) goes to a digital pin for threshold detection.

In your program, you can read the analog value to determine magnetic intensity or use the digital signal for quick logic decisions.

Tips for Best Performance

• Always calibrate the potentiometer before using the digital output.
• Avoid placing the sensor near strong electromagnetic sources (like high-power motors) unless intended.
• Mount it securely to prevent movement which could affect detection accuracy.
• Use shielded cables if you’re running analog output over long distances.

Where to Buy the KY-024 Magnetic Sensor Module

You can find high-quality, affordable KY-024 sensor modules right here at Shop4Makers. We offer:

• ✅ Tested, reliable components
• ✅ Fast delivery across Morocco
• ✅ Expert advice and tutorials
• ✅ Bundles for beginners and educators

Browse our full selection of Arduino-compatible sensors and make your next project smarter and more interactive.

Conclusion: Why the KY-024 is a Must-Have for Makers

The KY-024 magnetic sensor module stands out as a compact, affordable, and powerful component for countless electronics applications. Whether you’re into automation, security, robotics, or education, the KY offers unmatched versatility for your builds.

At Shop4Makers, we’re proud to support the maker community in Morocco and beyond by providing tools that empower creativity, innovation, and learning.

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