User Manual

73
Lesson 14 Rain Detection Module
Introduction
The rain detection module detects rain on the board. Place the rain detection board in the
open air. When it is raining, the rain detection module will sense the raindrops and send
signals to the Raspberry Pi.
Components
- 1 * Raspberry Pi
- 1 * Breadboard
- 4 * Jumper wires (Male to Male, 2 red and 2 black)
- 1 * Network cable (or USB wireless network adapter)
- 1 * Rain Detection module
- 1 * PCF8591
- 1 * LM393
- 1 * 2-Pin ribbon cable
- 1 * 4-Pin anti-reverse cable
- Several Jumper wires (Male to Female)
- 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.