FC-37 module - humidity and rain sensor for ARDUINO

The FC-37 module is a high sensitivity humidity sensor and board designed based on the LM393 comparator. The LM393 chip processes and transmits the signal to the microcontroller in digital or analog form. This module can be used in projects where it is necessary that the device turns on when moisture interacts (in the detection of water leaks, in weather stations, etc.).

The principle of operation of the module is to change the output voltage from the resistance of the sensor. If the board is wet, the resistance increases and the output voltage decreases, respectively, if the sensor is dry, then the resistance decreases, the voltage increases.

The sensitivity of the sensor is adjusted using a potentiometer.

There are 2 connectors on the module (J1, J2). J1 is required to connect the sensor to the module, and J2 is used to power the module and transmit the signal. An analog signal is transmitted via output A0, similarly, a digital signal is transmitted via contact D0. Contacts VCC and GND are designed to supply voltage to the module board.

There are 2 indicators on the board: PWR-Led LED, which informs about the power supply to the module board, D0-Led lights up when a digital signal is transmitted to the device microcontroller.

The voltage on the module board can be supplied from an external power source, Arduino Uno or other device designed on a microcontroller.

Module Specifications:

Supply voltage, V 3.3 ... 5
Output types analog, discrete
Module dimensions, mm 1.7 x 60 x 39
Weight, g 7.