How to use:
Connected to 5V power supplythe power indicator lightsensor board is not water dropletsDO output is highthe switch lights offdropping on a drop of waterDO output is lowthe indicator light switchBrush off the the above water dropletshas returned to output high state. . . . AO analog output can be connected to the microcontroller AD port to detect the size of the drops in the above rainfall. DO TTL digital outputs can also be connected to the microcontroller detects whether there is rain.
- VCC: positive power supply (3-5V)
- GND: negative one.
- DO: TTL switching signal output
- AO: Analog signal output