A reed switch is a magnetic sensor that is normally open and gets closed when exposed to a magnetic field. The KY-021 Mini Magnetic Reed Switch Module consists of a 10kΩ resistor and a small reed switch actuated by a magnetic field, commonly used in mechanical systems as proximity sensors. Compatible with popular electronic platforms like Arduino, Teensy, and ESP8266.

Operating Voltage: 3.3V to 5v

Output Type: Digital

Package Include:

• 1 x KY-021 Magnetic Reed Sensor

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