KY-021 Mini Magnetic Reed Module | Sensors | Detect/Communicate

This is KY-021 Mini Magnetic Reed Module from the category Sensors | Detect/Communicate.

1 typically open reed switch import

2, the output of the comparator, a clear signal, a driving waveform, and more than 15 mA.

3, an easy installation bolt hole that is fixed.

4, operational voltage 3.3V-5V, tiny board PCB size: 3.2cm x 1.4cm

6, the output as digital switching outputs (0 and 1)

Wide voltage LM393 comparator, number 7.

one KY-021 Module in the packing list