Linear Hall Effect Sensor Module – Magnetic Pole Detector
Linear Hall Effect Sensor Module – Magnetic Pole Detector
Linear Hall Effect Sensor Module – Magnetic Pole & Field Strength Detection
The Linear Hall Effect Sensor Module is a compact, versatile electronic sensing tool designed for makers, engineers, and electronics hobbyists. It accurately identifies magnetic pole polarity (N or S) and measures magnetic field intensity, outputting a proportional voltage signal for easy integration with microcontrollers and ADC-based systems. Made in Mainland China.
Key Features
- Flexible Power Input: Power via USB Type-C at +5V (compatible with power banks) or through 2.54mm external pins supporting 3.3V–40V wide-voltage input.
- Linear Voltage Output: Output voltage is directly proportional to magnetic field intensity — reference static voltage (no magnet) is 1.65V (half of the 3.3V LDO supply).
- Visual Polarity Indication: A blue LED illuminates when the S-pole is detected (voltage increases); a red LED illuminates when the N-pole is detected (voltage decreases).
- High Sensitivity: Magnetic field strength detection sensitivity of 1.6 mV/GS via the AOC output pin.
- Low-Noise Integrated Circuit: Minimal external filtering required thanks to the module's low-noise IC design.
- Temperature-Stable Design: Precision resistors improve temperature stability and circuit accuracy.
- Built-in 3.3V LDO: Powers both the sensor and MCU from a single 5V supply — no extra regulators needed.
- ABS Housing: Lightweight, durable black ABS enclosure for easy bench or project use.
Specifications
| Material | ABS |
| Color | Black |
| Power Input | Type-C (+5V) or 2.54mm pins (3.3V–40V) |
| LDO Output | 3.3V (onboard) |
| Static Reference Voltage (B=0) | 1.65V |
| Sensitivity | 1.6 mV/GS (AOC) |
| Pole Indicator LEDs | Blue (S-pole) / Red (N-pole) |
| Country of Origin | Made in Mainland China |
How to Use
- ADC Method: Power on the module and read the AOC output voltage via an ADC pin. Voltages above 1.65V indicate S-pole; below 1.65V indicate N-pole. Field strength is proportional to the voltage deviation from 1.65V.
- LED Indicator Method: Power on, press the power button, and wait 30 seconds for self-test to complete. Bring a magnet vertically close to the sensor tip — the corresponding LED (blue or red) will light to indicate polarity.
⚠️ Important Note: Keep magnets away from the module during the 30-second self-test after power-on to ensure accurate calibration.
Package Contents
- 1 × Linear Hall Effect Sensor Module
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Frequently Asked Questions
Q: What is the output voltage when there is no magnetic field present?
A: When no magnet is nearby (B=0 GS), the static output voltage at the AOC pin is 1.65V, which is exactly half of the onboard 3.3V LDO supply voltage. This serves as your baseline reference when using an ADC to determine magnetic polarity and field strength.
Q: Can this Hall effect sensor module be powered by a USB power bank?
A: Yes! The module features a USB Type-C input that accepts +5V, making it fully compatible with standard USB power banks. Alternatively, you can use the 2.54mm external pin connectors to supply any voltage between 3.3V and 40V from an external power supply or your project's existing rail.
Q: How do the LED indicators show magnetic pole polarity?
A: The module uses two color-coded LEDs for instant visual feedback: the blue LED lights up when an S-pole magnetic field is detected (output voltage rises above 1.65V), while the red LED lights up when an N-pole magnetic field is detected (output voltage falls below 1.65V). The brighter the LED, the stronger the magnetic field.
Q: Does this module require external filtering components?
A: No extensive external filtering is needed. The integrated circuit features a low-noise design that keeps the output signal clean and stable. Built-in precision resistors also help maintain temperature stability and accuracy, so you can use it directly in your circuit with minimal additional components.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.