Arduino Hand Wash Timer

1/*Code written by Danny Pashkow
2Updated November 2020*/
3
4#include
5  <LiquidCrystal.h>
6#include "pitches.h"
7
8bool isHand = false;
9
10#define
11  screenPower 7 //define screen power pin (to automatically turn lcd backlight on
12  and off)
13
14// defines HC-SR04 pin numbers
15const int trigPin = 9;
16const
17  int echoPin = 10;
18
19//variables for HC-SR04
20long duration; 
21int distance;
22
23  
24// Create an LCD object. Parameters: (RS, E, D4, D5, D6, D7):
25LiquidCrystal
26  lcd = LiquidCrystal(13, 12, 5, 4, 3, 2);
27
28int timeLeft = 20; //variable for
29  displaying time left
30
31int speakerPin = 11;
32
33int toneDuration = 100;
34int
35  tickDuration = 25;
36
37//array of notes for done tone
38int doneTone[] = {
39
40  NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5
41};
42
43//note
44  of the ticking sound
45int tick[] = {
46  NOTE_C5
47};
48
49void setup() {
50
51  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
52  pinMode(echoPin,
53  INPUT); // Sets the echoPin as an Input
54  Serial.begin(9600); // Starts the serial
55  communication
56  
57  //Setup LCD rows and columns:
58  pinMode(screenPower,
59  OUTPUT);
60  digitalWrite(screenPower, HIGH);
61  delay(200);
62  lcd.begin(16,
63  2);
64  lcd.setCursor(0, 0);
65  lcd.print("Hand Wash Timer");
66  lcd.setCursor(0,
67  1);
68  lcd.print("By:Danny Pashkow");
69  delay(3000);
70  lcd.clear();
71
72  lcd.setCursor(0, 0);
73  digitalWrite(screenPower, LOW);
74}
75void loop()
76  {
77  // Clears the trigPin
78  digitalWrite(trigPin, LOW);
79  delayMicroseconds(2);
80
81  // Sets the trigPin on HIGH state for 10 micro seconds
82  digitalWrite(trigPin,
83  HIGH);
84  delayMicroseconds(10);
85  digitalWrite(trigPin, LOW);
86  // Reads
87  the echoPin, returns the sound wave travel time in microseconds
88  duration =
89  pulseIn(echoPin, HIGH);
90  // Calculating the distance
91  distance = duration
92  * 0.034 / 2;
93  // Prints the distance on the Serial Monitor
94  Serial.print("Distance:
95  ");
96  Serial.println(distance);
97
98  if (distance < 10) {
99    Serial.println("Hand
100  detected");
101    isHand = true;
102  }
103
104  if (isHand == true) {
105    handDetected();
106
107  }
108
109  if (timeLeft < 0) {
110    noTimeLeft();
111  }
112}
113
114void noTimeLeft()
115  {
116  lcd.clear();
117  lcd.setCursor(6, 0);
118  lcd.print("Done!");
119  for
120  (int thisNote = 0; thisNote < 8; thisNote++) {
121    tone(11, doneTone[thisNote],
122  toneDuration);
123    delay(100);
124  }
125  delay(5000);
126  lcd.clear();
127
128  digitalWrite(screenPower, LOW);
129  timeLeft = 20;
130  isHand = false;
131  lcd.setCursor(0,
132  0);
133}
134
135void handDetected() {
136  digitalWrite(screenPower, HIGH);
137
138  lcd.clear();
139  lcd.setCursor(0, 0);
140  lcd.print("Time Remaining: ");
141
142  lcd.setCursor(0, 1);
143  lcd.print(timeLeft);
144  lcd.print(" seconds");
145
146  timeLeft -= 1;
147  for (int thisTick = 0; thisTick < 3; thisTick++) {
148    tone(speakerPin,
149  tick[thisTick], tickDuration);
150  }
151  delay(1000);
152}

1/*************************************************
2 * Public Constants
3  *************************************************/
4
5#define NOTE_B0  31
6#define  NOTE_C1  33
7#define NOTE_CS1 35
8#define NOTE_D1  37
9#define NOTE_DS1 39
10#define  NOTE_E1  41
11#define NOTE_F1  44
12#define NOTE_FS1 46
13#define NOTE_G1  49
14#define  NOTE_GS1 52
15#define NOTE_A1  55
16#define NOTE_AS1 58
17#define NOTE_B1  62
18#define  NOTE_C2  65
19#define NOTE_CS2 69
20#define NOTE_D2  73
21#define NOTE_DS2 78
22#define  NOTE_E2  82
23#define NOTE_F2  87
24#define NOTE_FS2 93
25#define NOTE_G2  98
26#define  NOTE_GS2 104
27#define NOTE_A2  110
28#define NOTE_AS2 117
29#define NOTE_B2  123
30#define NOTE_C3  131
31#define NOTE_CS3 139
32#define NOTE_D3  147
33#define  NOTE_DS3 156
34#define NOTE_E3  165
35#define NOTE_F3  175
36#define NOTE_FS3  185
37#define NOTE_G3  196
38#define NOTE_GS3 208
39#define NOTE_A3  220
40#define  NOTE_AS3 233
41#define NOTE_B3  247
42#define NOTE_C4  262
43#define NOTE_CS4  277
44#define NOTE_D4  294
45#define NOTE_DS4 311
46#define NOTE_E4  330
47#define  NOTE_F4  349
48#define NOTE_FS4 370
49#define NOTE_G4  392
50#define NOTE_GS4  415
51#define NOTE_A4  440
52#define NOTE_AS4 466
53#define NOTE_B4  494
54#define  NOTE_C5  523
55#define NOTE_CS5 554
56#define NOTE_D5  587
57#define NOTE_DS5  622
58#define NOTE_E5  659
59#define NOTE_F5  698
60#define NOTE_FS5 740
61#define  NOTE_G5  784
62#define NOTE_GS5 831
63#define NOTE_A5  880
64#define NOTE_AS5  932
65#define NOTE_B5  988
66#define NOTE_C6  1047
67#define NOTE_CS6 1109
68#define  NOTE_D6  1175
69#define NOTE_DS6 1245
70#define NOTE_E6  1319
71#define NOTE_F6  1397
72#define NOTE_FS6 1480
73#define NOTE_G6  1568
74#define NOTE_GS6 1661
75#define  NOTE_A6  1760
76#define NOTE_AS6 1865
77#define NOTE_B6  1976
78#define NOTE_C7  2093
79#define NOTE_CS7 2217
80#define NOTE_D7  2349
81#define NOTE_DS7 2489
82#define  NOTE_E7  2637
83#define NOTE_F7  2794
84#define NOTE_FS7 2960
85#define NOTE_G7  3136
86#define NOTE_GS7 3322
87#define NOTE_A7  3520
88#define NOTE_AS7 3729
89#define  NOTE_B7  3951
90#define NOTE_C8  4186
91#define NOTE_CS8 4435
92#define NOTE_D8  4699
93#define NOTE_DS8 4978

1/*Code written by Danny Pashkow
2Updated November 2020*/
3
4#include  <LiquidCrystal.h>
5#include "pitches.h"
6
7bool isHand = false;
8
9#define  screenPower 7 //define screen power pin (to automatically turn lcd backlight on  and off)
10
11// defines HC-SR04 pin numbers
12const int trigPin = 9;
13const  int echoPin = 10;
14
15//variables for HC-SR04
16long duration; 
17int distance;
18  
19// Create an LCD object. Parameters: (RS, E, D4, D5, D6, D7):
20LiquidCrystal  lcd = LiquidCrystal(13, 12, 5, 4, 3, 2);
21
22int timeLeft = 20; //variable for  displaying time left
23
24int speakerPin = 11;
25
26int toneDuration = 100;
27int  tickDuration = 25;
28
29//array of notes for done tone
30int doneTone[] = {
31  NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5
32};
33
34//note  of the ticking sound
35int tick[] = {
36  NOTE_C5
37};
38
39void setup() {
40  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
41  pinMode(echoPin,  INPUT); // Sets the echoPin as an Input
42  Serial.begin(9600); // Starts the serial  communication
43  
44  //Setup LCD rows and columns:
45  pinMode(screenPower,  OUTPUT);
46  digitalWrite(screenPower, HIGH);
47  delay(200);
48  lcd.begin(16,  2);
49  lcd.setCursor(0, 0);
50  lcd.print("Hand Wash Timer");
51  lcd.setCursor(0,  1);
52  lcd.print("By:Danny Pashkow");
53  delay(3000);
54  lcd.clear();
55  lcd.setCursor(0, 0);
56  digitalWrite(screenPower, LOW);
57}
58void loop()  {
59  // Clears the trigPin
60  digitalWrite(trigPin, LOW);
61  delayMicroseconds(2);
62  // Sets the trigPin on HIGH state for 10 micro seconds
63  digitalWrite(trigPin,  HIGH);
64  delayMicroseconds(10);
65  digitalWrite(trigPin, LOW);
66  // Reads  the echoPin, returns the sound wave travel time in microseconds
67  duration =  pulseIn(echoPin, HIGH);
68  // Calculating the distance
69  distance = duration  * 0.034 / 2;
70  // Prints the distance on the Serial Monitor
71  Serial.print("Distance:  ");
72  Serial.println(distance);
73
74  if (distance < 10) {
75    Serial.println("Hand  detected");
76    isHand = true;
77  }
78
79  if (isHand == true) {
80    handDetected();
81  }
82
83  if (timeLeft < 0) {
84    noTimeLeft();
85  }
86}
87
88void noTimeLeft()  {
89  lcd.clear();
90  lcd.setCursor(6, 0);
91  lcd.print("Done!");
92  for  (int thisNote = 0; thisNote < 8; thisNote++) {
93    tone(11, doneTone[thisNote],  toneDuration);
94    delay(100);
95  }
96  delay(5000);
97  lcd.clear();
98  digitalWrite(screenPower, LOW);
99  timeLeft = 20;
100  isHand = false;
101  lcd.setCursor(0,  0);
102}
103
104void handDetected() {
105  digitalWrite(screenPower, HIGH);
106  lcd.clear();
107  lcd.setCursor(0, 0);
108  lcd.print("Time Remaining: ");
109  lcd.setCursor(0, 1);
110  lcd.print(timeLeft);
111  lcd.print(" seconds");
112  timeLeft -= 1;
113  for (int thisTick = 0; thisTick < 3; thisTick++) {
114    tone(speakerPin,  tick[thisTick], tickDuration);
115  }
116  delay(1000);
117}