Video Tutorial
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Description
Hai friends, in this project we are going to make an automatic hand sanitiser which dispenses sanitiser without touching it. only you need to do show your hand towards the sanitiser box. it will detect you and spray sanitiser.
Components Required
| 1. | Arduino UNO | * 1 |
| 2. | servo motor | * 1 |
| 3. | Ultrasonic sensor | * 1 |
| 4. | Jumper Wires | |
| 5. | Bread Board | *1 |
| 6. | sanitiser | |
Circuit Diagram
Servo: Red wire - 5V, brown wire - GND, Yellow wire - pin 9
Sensor: VCC - 5V, GND-GND, Trig- 11, Echo- 12
Program
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#include <Servo.h>
Servo servosweep;
float pos = 0.0;
void setup()
{
servosweep.attach(9);
Serial.begin (9600);
pinMode(11,OUTPUT);
pinMode(12,INPUT);
}
void loop()
{
long duration, distance;
digitalWrite(11, LOW);
delayMicroseconds(2);
digitalWrite(11, HIGH);
delayMicroseconds(10);
digitalWrite(11, LOW);
duration = pulseIn(12, HIGH);
distance = (duration/2) / 29.1;
Serial.print(distance);
Serial.println(" cm");
delay(200);
if (distance < 30)
{
servosweep.write(150);
delay(20);
}
if (distance > 30)
{
servosweep.write(0);
delay(20);
}
}