How does it work
Components Required for automatic soap dispenser
Circuit Diagram for automatic soap dispenser
Code for Arduino automatic soap dispenser
You can also see the video tutorial for this project

Published September 15, 2021

How to make automatic soap dispenser

This is an automatic soap dispenser project that we made using Arduino and servo motors.

BeginnerProtip2 hours3,252

Things used in this project

Hardware components

Arduino UNO

SG90 Micro-servo motor

SparkFun Ultrasonic Sensor - HC-SR04

9V battery (generic)

Jumper wires (generic)

Breadboard (generic)

USB-A to B Cable

Software apps and online services

Arduino IDE

Story

Hey guys, In this project, we are making the automatic soap dispenser using Arduino. The major benefit of this project is that if you will use this project you will wash your hand automatically for 20 seconds. We use two servo motors in our project, one is for the display timer and the other one is for dispensing the soap. This project detects your hand automatically and after ejecting some soap drops the timer will start automatically for the next twenty seconds. There is an ultrasonic sensor that can detect your hands. For more information about this project please visit the original post of this project and also bookmark TECHATRONIC.COM as all my further projects will be pre-uploaded there.

How does it work?

You just need to place your hand in front of the automatic soap dispenser, there is a sensor fitted in the dispenser and it will detect your hand in front of the sensor and then the soap will dispense in your hand. According to doctors the ideal time for washing the hands is 20 seconds. So the timer is there for helping you to wash your hands perfectly. After 20 seconds the system will reset automatically. You don't need to touch the soap dispenser which makes it germs-free. All the steps and materials required for making this project are given below.

Components Required for automatic soap dispenser

Arduino NANO or Uno (any version)
HC-SR04 Ultrasonic Sensor
Servo Motors
Jumper Wires
On-Off switch
Battery

Circuit Diagram for automatic soap dispenser

Make sure that all the connections should be made properly according to the given diagram.

Code for Arduino automatic soap dispenser

NOTE: Please upload this code to the Arduino.

You can also see the video tutorial for this project

Thanks for reading.

CODE

#include <Servo.h>
Servo myservo;
Servo myservo1;// create servo object to control a servo
// twelve servo objects can be created on most boards
int pos = 0;
int duration_front=0;
long distance_front=0;
void setup() {
// put your setup code here, to run once:
myservo.attach(9);
myservo1.attach(10);
myservo.write(180);
myservo1.write(180);
pinMode(2,OUTPUT);
pinMode(3,INPUT);
pinMode(9,OUTPUT);
pinMode(10,OUTPUT);
Serial.begin(9600);
}
void loop() {
digitalWrite(2, HIGH);
delayMicroseconds(10);
digitalWrite(2, LOW);
delayMicroseconds(2);
duration_front= pulseIn(3,HIGH);
distance_front=duration_front*0.034/2;
Serial.println(distance_front);
if(distance_front<=10)
{
// put your main code here, to run repeatedly:
myservo.write(180); // tell servo to go to position in variable ‘pos’
myservo.write(0); // tell servo to go to position in variable ‘pos’
delay(500); // waits 15ms for the servo to reach the position
myservo.write(180); // tell servo to go to position in variable ‘pos’
delay(500); // waits 15ms for the servo to reach the position
// waits 15ms for the servo to reach the position
for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
myservo1.write(pos); // tell servo to go to position in variable ‘pos’
delay(113); // waits 15ms for the servo to reach the position
}
}
}

Credits

Techatronic

73 projects • 132 followers

Electronic engineer

Contact

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How to make automatic soap dispenser

How to make automatic soap dispenser

Things used in this project

Hardware components

Software apps and online services

Story

How does it work?

Components Required for automatic soap dispenser

Circuit Diagram for automatic soap dispenser

Code for Arduino automatic soap dispenser

You can also see the video tutorial for this project

Code

CODE

Credits

Techatronic

Comments

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