AUTOMATIC WATER LEVEL CONTROLLER USING ARDUINO

Hi all , are you looking to control your tank water level automatically here's the post for you, how can water level be controlled automatically?

There are many ways by using a float sensor to determine the water level, or using probes to detect peak and low level in the tank.

How to measure water level without using probe or contacting with water?

yeah there is a way just using a Ultrasonic sensor, this is very simple where the level of water is measured using ultrasonic sensor which gives the depth , by determining the tank depth we can set the maximum and minimum level 

circuit diagram shown in the above fritzing, where it uses only two components, one is HC-SR 04 ultrasonic sensor and relay controller, relay controller is connected to the motor. 

Components required

Arduino
HC-SR 04
Relay

Arduino Program

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/*

 HC-SR04 Ping distance sensor:

 VCC to arduino 5v 

 GND to arduino GND

 Echo to Arduino pin 9 

 Trig to Arduino pin 8*/

#define echopin  9 // echo pin

#define trigpin 8 // Trigger pin

int maximumRange = 50;

long duration, distance;

void setup() {

  Serial.begin (9600);

  pinMode (trigpin, OUTPUT);

  pinMode (echopin, INPUT );

  pinMode (4, OUTPUT);

  pinMode (13,OUTPUT);

}

  

void loop ()

{

  {

    digitalWrite(trigpin,LOW);

    delayMicroseconds(2);

    

    digitalWrite(trigpin,HIGH);

    delayMicroseconds(10);

    

    duration=pulseIn (echopin,HIGH);

    

    distance= duration/58.2;

    delay (50);

    Serial.println(distance);

  }

  

 if (distance >= 25 ){

   digitalWrite (4,HIGH);

   digitalWrite (13,HIGH);

 }

 else if (distance <=10) {

   digitalWrite (4,LOW);

   digitalWrite (13,LOW);

 }

}

  

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give the distance according to your specification, I've used a small bucket where 25 is the minimum level to turn ON the motor and if the water level reaches a distance of 10cm or lesser than that the motor automatically stops.

If you want to add an LCD to this device to indicate water level check this link here