Keyes KY-003 Hall Effect Sensor

Product detailed description

The Keyes KY-003 module is a digital Hall effect sensor designed for non-contact magnetic field detection. It uses the A3144 circuit (or compatible), which pulls the output to logical 0 when a magnet is brought close – otherwise, the output remains at logical 1. The module is suitable for position detection, rotation (encoders, flow meters), or as a simple non-contact switch in projects with Arduino or ESP32.

Specifications:

• Sensor Type: digital Hall effect sensor (A3144 or compatible)
• Power supply: 5 V DC
• Output: digital (LOW when a magnetic field is detected, HIGH at rest)
• Sensitivity: responds to the south pole of a magnet brought close to the front side of the sensor
• Pins: 3 (S – signal output, middle pin – VCC, – GND)
• Indication: an LED on the module signals the detection of a magnetic field
• Compatibility: Arduino, ESP32, Raspberry Pi and other microcontrollers with a digital input
• Dimensions: approx. 15 × 18 mm

Package contents:

• 1× Keyes KY-003 Hall Effect Sensor

Note:

• This product is not a standalone functional unit and may require professional installation.
• Product images are for illustration purposes only and may sometimes differ from the actual appearance of the item. However, this does not change their basic properties.