SKU: SENS-2802
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Elecrow Crowtail-Hall Sensor 2.0 Module - Unipolar Magnetic Switch

₹159.00 (Inclusive of all taxes)
Out of Stock

The Elecrow Crowtail-Hall Sensor 2.0 is a unipolar magnetic switch module based on the Allegro MicroSystems A1101 Hall-effect IC, designed for easy integration with Crowtail, Arduino, and Raspberry Pi systems for proximity and position sensing.

Features

  • Features the Allegro MicroSystems A1101 Hall-effect switch for reliable magnetic field detection.
  • Unipolar switching activates with a south magnetic pole, providing a clean digital output signal.
  • Fast 400ns transition period for responsive rise and fall times.
  • Built-in reverse battery protection safeguards the module during installation.
  • Crowtail interface ensures plug-and-play compatibility with a wide range of microcontroller development boards.

Out of stock

Description

This sensor module employs the Allegro MicroSystems A1101, a continuous-time Hall-effect switch that generates a low digital output when a sufficient south pole magnetic field is applied perpendicular to its face. The sensing principle relies on the Hall effect, where a voltage differential is created across a semiconductor in the presence of a magnetic field orthogonal to an applied current.

The module is designed for robust operation with a 5V DC supply and includes signal conditioning circuitry for a clean, digital output compatible with 3.3V and 5V logic systems. Its compact form factor and standardized Crowtail connector make it ideal for prototyping and embedded system integration requiring non-contact magnetic sensing.

Key Features

  • High-performance Allegro MicroSystems A1101 Hall-effect sensor IC for precise magnetic switching.
  • Unipolar operation simplifies detection logic, activating only with a specific magnetic pole.
  • Ultra-fast 400ns output transition period enables high-speed detection applications.
  • Integrated reverse polarity protection prevents damage from incorrect power connections.
  • Optimized Crowtail interface for seamless connection to popular development ecosystems.
  • Continuous-time sensing provides real-time magnetic field monitoring without a clock signal.

Applications

  • Non-contact position sensing in robotics and automated machinery.
  • Speed detection and RPM measurement using magnetic encoders.
  • Proximity and door/window status detection in security systems.
  • Flow rate monitoring in liquid systems using magnetic impellers.
  • End-stop and limit switch replacement in 3D printers and CNC machines.

Technical Specifications

Model NameCrowtail-Hall Sensor 2.0
Sensor ICAllegro MicroSystems A1101 Hall-effect Switch
Switch TypeUnipolar
Operating PrincipleHall Effect
Operating Voltage5 V DC
Output SignalDigital (Active Low)
Transition Period400 ns (Typical)
InterfaceCrowtail (4-pin)
ProtectionReverse Battery Protection

Frequently Asked Questions

What is the operating voltage range for this Hall sensor module?

The module is designed for a nominal operating voltage of 5V DC. It includes reverse battery protection, but it is crucial to stay within the specified voltage to ensure proper operation of the Allegro MicroSystems A1101 IC and avoid damage to the onboard circuitry.

How does the unipolar switching work, and what magnetic pole does it detect?

This is a unipolar Hall-effect switch, meaning it responds only to one magnetic pole orientation. The sensor's output goes low (activates) when a south magnetic pole of sufficient strength is applied perpendicular to the marked face of the sensor. It returns high when the magnetic field is removed.

What is the output signal type, and how do I connect it to an Arduino?

The module provides a clean digital output signal (active low). Using the Crowtail interface, you connect the module's VCC to 5V, GND to ground, and the signal pin to any digital input pin on your Arduino or compatible microcontroller. The output pin will pull low in the presence of the correct magnetic field.

What is the typical response time of this sensor?

The sensor features a very fast transition period of 400 nanoseconds for both the rising and falling edges of its output signal. This high-speed response makes it suitable for applications requiring rapid detection, such as speed sensing or high-frequency counting.

Package Includes

  • 1 x Crowtail-Hall Sensor Module

Additional Information

Weight 0.009 kg
Dimensions 6 × 8 × 2 cm