Sensor-Arduino Metal and Human Body Touch:
A transistor is used by the analogue/digital KY-036 Metal Touch Sensor Module to measure variations in electrical conductivity.
The conductivity of the transistor varies in response to a finger touching it, causing the module to output an analogue and digital signal.
A switch that changes states when touched can be used with the digital output.
The touch's intensity can be determined using the analogue output.
The on-board potentiometer can be used to control the detecting threshold.
Compatible with widely used microcontroller boards, such as Raspberry, ESP32, Arduino, and ESP8266.
Specifications:
This module consists of a transistor to detect touch
LM393 differential comparator to control the digital output
3296W potentiometer to adjust the detection threshold
6 current limiting resistors
2 indicator LEDs
4 male header pins
The module features analog and digital outputs.
Operating voltage: 3.3V ~ 5.5V
Board Dimensions: 15mm x 36mm [0.6in x 1.4in]