Raindrop meter analog/digital

Raindrop meter analog/digital

Product information:

This raindrop meter measures how much water is on its surface.
On the analog output (AO) you can measure how much water is on it with a signal between 0 and Vcc.
The digital output (D0) gives 0 or 1 depending on the threshold set with the potentiometer.
At a certain amount of water the output will go to 0. If it is dry or below the threshold the output is 1.

Input voltage (Vcc): 3.3V-5V
Digital (pin DO) and analog output (pin AO).
Sensitivity (threshold) adjustable with digital potentiometer on the PCB (for the digital output).

Dimensions:
- Measuring surface: 53x39mm.
- Measuring print: 30x16mm.

With green on/off LED and red LED indicating digital output (high/low).
Red LED on = soil moist enough.
Powered by an LM393 comparison chip.

Connections:
1. VCC: power supply (3-5V)
2. GND: ground
3. DO: TTL digital output
4. AO: Analog signal output