The KY-025 Reed Switch Module is a small electrical switch operated by an applied magnetic field, commonly used as proximity sensor.

The module has both digital and analog outputs. A trimmer is used to calibrate the sensitivity of the sensor.

Compatible with Arduino, Raspberry Pi, ESP32 and other microcontrollers. For digital output only use theKY-021 mini reed switch.

KY-025 SPECIFICATIONS

This module consist of a 2x14mm normally openreed switch, an LM393 dual differential comparator, a 3296W-104 trimmer pontetiometer, 6 resistors, 2 LEDs and 4 male header pins.

CONNECTION DIAGRAM

Connect the boards analog output (A0) to pin A0 on the Arduino and the digital output (D0) to pin 3.

Connect the power line (+) and ground (G) to5V and GND respectively.