Introduction
When wired with a 5v supply, the power light will be on. When the sensor detects no raindrop, D0 is high and the indicator keeps out. Drop some water onto the sensor. The more drops, the lower value at A0. When the value of A0 is smaller than the value set, D0 will change from high to low and the indicator will light up.

Application
It is widely used in the automatic wiper system, smart lighting system and sunroof system of automobiles.

Component List
- 1 * Raindrop Sensor module

Detailed Description :

Water Sensor water level sensor is an easy-to-use, cost-effective high level/drop recognition sensor, which is obtained by having a series of parallel wires exposed traces measured droplets/water volume in order to determine the water level. Easy to complete water to analog signal conversion and output analog values can be directly read Arduino development board to achieve the level alarm effect.

Specifications :

Application 
The module can count by rotation the pulses output both clockwise and counterclockwise. Different from potentiometer, the counting is unrestricted. It can be restored to the original state by the button on the module, i.e. counting from 0. 

Application 
It is widely applied in fields such as steel, harbor machinery, hoisting machinery, pressure machinery, glass machinery, packaging machinery, etc. 

Component List 
- 1 * Rotary Encoder module 
- 1 * 5-Pin anti-reverse cable 

Specifications:

This is a standard 12mm square momentary button. What we really like is the large button head and good tactile feel (it 'clicks' really well). This button is great for user input on a PCB or a good, big reset button on a breadboard. Breadboard friendly!

The MEC Multimec® 1DS/1ES/1FS series of switch caps are designed to be mounted on the Multimec® 5G series of tactile switches.

This is a standard 12mm square momentary button. What we really like is the large button head and good tactile feel (it 'clicks' really well). This button is great for user input on a PCB or a good, big reset button on a breadboard. Breadboard friendly!

Specifications:

RATING:0.1A/1A/3A 125VAC

Specifications： 
Operating frequency(mechanical).....120 Operation / mim
Operating frequency(electrical).....10~30 Operation / mim
Contact resistance.....100m Ω(max)
Insulation resistance(at 500 VDC).....100M Ω(Min)
Service life(mechanical).....Min. 1000000 Operations
Service life(electrical).....1A/3A-Min.10,000 Operations
 

Application： 
Mouses,Joysticks,Small home appliances,Central heating control,Electronic Door Locks,Smart Meter