Digital Fabrication (Arduino Advanced)

For this report, we were asked to designed an Automatic hand-sanitizer dispenser. The materials used for this lab are Arduino microcontroller, ultrasonic sensor and a rectangular base that is able to hold hand-sanitizer product

We research some drawings online and came up with a conclusion and sketch it first. The goal was to build an effective hand sanitizer dispenser . The ultrasonic sensor should detect the hand and release a specific amount of hand sanitizer by using the code in Arduino.

The code for our Arduino project is the following:

#include<Servo.h>

int trig=8;

int echo=9;

int dt=10;

Servo servo;

//int distance,duration;

void setup() {

// put your setup code here, to run once:

pinMode(trig,OUTPUT);

pinMode(echo,INPUT);

Serial.begin(9600);

servo.attach(3);

}

void loop() {

// put your main code here, to run repeatedly:

if (calc_dis()<10)

{

for (int i=0;i<=180;i++)

{

servo.write(i);

delay(1);

}

delay(100);

for (int i=180;i>=0;i--)

{

servo.write(i);

delay(1);

}

delay(100);

}

}

//This code is written to calculate the DISTANCE using ULTRASONIC SENSOR

int calc_dis()

{

int duration,distance;

digitalWrite(trig,HIGH);

delay(dt);

digitalWrite(trig,LOW);

duration=pulseIn(echo,HIGH);

distance = (duration/2) / 29.1;

Serial.println((String) "Duration" +"Duration" + "Duration" + distance);

return distance;

}