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SmartElex BMM150 3 Axis Magnetometer Sensor

SmartElex BMM150 3 Axis Magnetometer Sensor

₹290.00Price
🔍 Overview
The module is based on the BMM150 3-axis geomagnetic sensor IC, a low-power digital magnetometer designed for magnetic field measurement and compass applications.
  • Measures magnetic field along:
    • X-axis
    • Y-axis
    • Z-axis
  • Detects:
    • Earth’s magnetic field
    • External magnetic sources
👉 Commonly used for heading (compass), orientation, and magnetic sensing.
⚙️ Working Principle
🧠 Magneto-Resistive Sensing
  • Uses anisotropic magnetoresistance (AMR) technology
  • Magnetic field changes → alters resistance of sensing elements
🔄 Signal Processing
  • Magnetic field interacts with sensing elements
  • Resistance changes occur
  • Internal circuitry converts signal
  • ADC produces digital output values
👉 Output represents magnetic field strength in 3 axes.
📊 Measurement Characteristics
Magnetic Field Range
  • Typical measurement range: ±1300 µT (X/Y)
  • ±2500 µT (Z-axis)
Resolution
  • High-resolution digital output (13–15 bits typical)
Sensitivity
  • Capable of detecting:
    • Weak Earth magnetic field (~25–65 µT)
    • Strong nearby magnetic sources
⚡ Electrical Characteristics
  • Supply voltage: 1.62V to 3.6V
  • Very low power consumption
  • Multiple power modes available
🔗 Communication Interface
  • I²C interface
  • SPI interface
👉 Compatible with most microcontrollers.
🧠 Internal Features
✔ Built-in Hall / AMR Front-End
  • Accurate magnetic sensing
✔ Offset Compensation
  • Internal compensation reduces measurement errors
✔ Temperature Compensation
  • Improves stability over temperature changes
✔ Interrupt System
  • Can generate interrupts based on:
    • Data ready
    • Threshold conditions
✔ Low Power Modes
  • Modes include:
    • Sleep
    • Forced
    • Normal
🔄 Operating Behavior
✔ Magnetic Field Measurement
  • Measures both:
    • Static magnetic fields
    • Dynamic field changes
✔ Compass Functionality
  • Uses X and Y axes to determine heading direction
✔ Orientation Detection
  • Combined with accelerometer → full orientation sensing
🌡️ Environmental Characteristics
  • Stable across temperature variations
  • Suitable for indoor and outdoor use
⚠️ Limitations
  • Sensitive to:
    • Nearby metal objects
    • Electromagnetic interference
  • Requires calibration for:
    • Accurate compass readings
  • Cannot measure:
    • Distance directly
🔌 Typical Pin Configuration
  • VCC → Power supply
  • GND → Ground
  • SDA / MOSI → Data
  • SCL / SCK → Clock
  • CS → Chip select (SPI)
  • INT → Interrupt output
🧩 Functional Role
The module acts as a:
  • Magnetic field sensor
  • Digital compass sensor
  • Orientation detection component
🏁 Summary
The SmartElex BMM150 Magnetometer is a compact and low-power magnetic sensing module that:
  • Measures 3-axis magnetic field (X, Y, Z)
  • Uses magneto-resistive sensing technology
  • Provides digital output via I²C/SPI
  • Offers high sensitivity and low power consumption
  • Is optimized for compass and orientation applications
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