2 wires sensor rain

Components

- 1 * Raspberry Pi

- 1 * Breadboard

- 1 * Network cable (or USB wireless network adapter)

the supplied material is only - 1 * Rain Detection module

- 1 * PCF8591

- 1 * LM393

- 1 * 2-Pin ribbon cable

- 1 * 4-Pin anti-reverse cable

- Several jumper wires (M to F)

- 1 * Glass of water (Self provided)

Experimental Principle

There are two metal wires that are close to each other but do not cross on the rain detection board. When rain drops on the board, the two metal wires will conduct, thus there is a voltage between the two metal wires. The schematic diagram is as shown below: