Description:

In this project, we build a rain detector using Arduino. Here, the HL-83 Rain sensor is used which detects rain drops. After detection the Buzzer makes sound, so you will know that it’s raining. Everything this controlled using Arduino Nano(Other Arduinos can be used too.).

Circuit Diagram:

Components:

SR. NO.	COMPONENT	PINOUT DIAGRAM	BUY
1	Arduino Nano (Other Arduinos can be used too)	Arduino UNO Pinout Diagram⇗
2	HL-83 Rain Sensor
3	Buzzer

Steps and Info:

1. Get correct components as given. You can buy online or offline. I buy electronics components mostly from Amazon.

2. Start connecting the components. If you are new to connecting components in an electronic circuit, then use a Breadboard or you can straight up make connections using Jumper wires but it will create problem when there will be two or more connections needed at one pin (for example two or more different sensors 5V connection to Arduino’s 5V pin). But before soldering components on a PCB or printing a PCB for your circuit, better try using breadboard so that any errors and mistakes can be observed on breadboard and not after soldering. Or do connections in your way.

3. Now after building the circuit, download the Arduino IDE from https://www.arduino.cc/ website.

4. If you are new to Arduino IDE software, then watch this video we made specially for beginners about Arduino IDE.

5. If you know Arduino IDE then straight up copy the code we given and paste it into the Arduino IDE sketch.

6. Connect the Arduino to your Computer/device. Select a proper port, proper Arduino type and whatever other settings are. Here it is Arduino UNO. (If you don’t know what this all is then watch our video: ).

7. Compile the code and Upload it.

8. If any error occurs then try to troubleshoot it by finding/copy-pasting it into our Solve Errors page https://electronicsprojects.in/solve-errors/, or you can straight up paste the error on Internet and you know the rest. Also check if there are no spelling/syntax errors in the code. Compile the code again once to check if errors are fixed. I have given proper connections and code but still nothing is perfect.

9. Once code compiles and uploads smoothly, you can start testing the working of your circuit/project.

10. Power up the Arduino, take the HL-83 Rain Sensor and start putting some water droplets on the sensor. When sensor detects water, then the buzzer will start making sound. If it doesn’t then check connections and code. Also you can talk with me and the community through discord. All the links to social is given at the right side of this page.

Program Code:

/* https://www.electronicsprojects.in Rain Detector using Arduino, HL-83 Rain Sensor and Buzzer */

#define rain A0
#define buzzer 5
int value;
int set=10;
void setup() {
  Serial.begin(9600);
  pinMode(buzzer,OUTPUT);
  pinMode(rain,INPUT);
  }	
void loop() {
  
 value = analogRead(rain);
 Serial.println("Rain Detector is ON");
 Serial.println(value);
 value = map(value,0,1023,225,0);
 Serial.println(value);
 if(value>=set){
  Serial.println("Rain has came");
  digitalWrite(buzzer,HIGH);
 }
 else{
  digitalWrite(buzzer,LOW);
 }
 delay(200);
}

Download:

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