Metal touch sensor module

Model: KY-036.
Metallic touch sensor module.
The module is an analog/digital sensor that uses a transistor to detect changes in electrical conductivity. When the transistor is touched with a finger, the conductivity changes and the module emits a digital and analog signal.
The digital output can be used a switch that changes state when touched. The analog output can measure the intensity of the touch. The detection threshold can be regulated using the on-board potentiometer.
Compatible with popular microcontroller boards like Arduino, ESP32, ESP8266 and Raspberry.
This module consists of a transistor to detect touch, an LM393 differential comparator to control the digital output, a 3296W potentiometer to adjust the detection threshold, 6 current limiting resistors, 2 indicator LEDs and 4 male header pins. The module features analog and digital outputs.
Operating voltage: 3.3 V ~ 5.5 V.
Board dimensions: 15 mm x 36 mm.