How To Set An Alarm On Digital Clock

Introduction: Alarm Clock

Hey! Do you want to learn how to create your very own alarm clock? Follow this step-by-step tutorial and you'll be able to do it easily. Have fun!

Obs.: This project was based on the alarm clock of the website "Mundo Projetado". Although, me and my group had to make some improvements. Here is the link to the original project: http://mundoprojetado.com.br/despertador-usando-o....

Step 1: Materials

To build the alarm clock, you'll need:

1 computer;
5 buttons;
1 display;
1 arduino;
1 buzzer;
1 potentiometer;
1 USB cable;
1 breadboard;
7 resistors - their values must be 100, 300, 500, 700, 900, 1.1 k, 1.3 k or close;
22 male-male jumper wires.

Step 2: Build Circuit 1

To build circuit 1, you'll need the display, the arduino, the potentiometer, 15 of the jumper wires and one of the resistors.

Follow the image and you should succeed!

Step 3: Build Circuit 2

To build circuit 2, you'll need all of the buttons, five of the jumper wires and the six remaining resistors.

Follow the image and you should succeed!

Step 4: Build Circuit 3

To build circuit 3, you'll need the buzzer, the arduino and the two remaining jumper wires.

Follow the images and you should succeed!

Step 5: The Code

First, you need to download the Arduino app (https://www.arduino.cc/en/Main/Software) and TimeLib (https://playground.arduino.cc/Code/Time). Then, you can copy and paste the code below in a new document in the Arduino app. Don't forget to upload the code!

Important: before you upload the code, don't forget to:

Check if you put the jumper wires in the right places of the arduino;
Connect the arduino to the computer.

#include <timelib.h><br></timelib.h>

#include  <liquidcrystal.h> LiquidCrystal lcd(12,11, 5, 4, 3, 2); // inicializa a biblioteca do display com os pinos de interface</liquidcrystal.h>

byte setaC[8] = { // simbolo da setinha na configuraçao   B00100,   B00100,   B01110,   B10101,   B00100,   B00100,   B00100,   B00100, };

byte relogio[8] = { // simbolo do relogio   B00000,   B10001,   B01110,   B10101,   B10111,   B10001,   B01110,   B00000, };

// Variaveis----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- String menu[3] = {"Mostrar horas", "Definir alarme", "Mudar as horas"}; // Frases do menu char selec = 0; // Variavel do menu principal int alarme[2] = {06, 00}; // Variavel do alarme bool telap = true, telaa = false, telah = false, telac = false, espera = false, ativado = true; // Variaveis de controle das telas

//Musica do despertador------------------------------------------------------------------------------------------------------------------------------------------------------------------ char* musica[] = {"Re", "Mi", "Fa", "Sol", "Do", "La", "Fa", "Do", "Fim"}; //Game of Thrones int duracao[] = {500, 500, 500, 500, 500, 500, 500, 500}; void tocar(char* mus[], int tempo[]); int buz = 10; // Pino do Buzzer

// ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- void setup() {   // LIQUIDCRYSTAL   lcd.createChar(2, relogio); // cria o desenho do relogio   lcd.createChar(1, setaC); // cria o desenho do relogio   lcd.begin(16, 2);

              // Relogio   setTime(12, 00, 0, 1, 1, 2017); // Define hora/min/segundo - dia/mes/ano      digitalWrite(A0, INPUT_PULLUP); // Seta o PULLUP no A0   pinMode(buz, OUTPUT);

              Serial.begin(9600); }

void loop() {   Serial.println(analogRead(A0));   while (telap) { // Tela principal     lcd.setCursor(0, 0); // Escreve as opçoes do menu     lcd.print(menu[selec]);     lcd.setCursor(0, 1);     if (selec < 2) lcd.print(menu[selec + 1]);          if (!espera && ativado) { // Simbolo do relogio caso o despertador esteja ativo       lcd.setCursor(15, 0);       lcd.write(2);     }          //--------------------------------------------Testa os botoes     if (analogRead(A0) < 995 && analogRead(A0) > 985 && selec > 0) {       selec--;  // Cima       lcd.clear();     }//lcd.setCursor(3,0); lcd.print(" "); lcd.setCursor(0,1); lcd.print(" "); lcd.setCursor(9,1); lcd.print(" ");}     if (analogRead(A0) < 980 && analogRead(A0) > 970 && selec < 2) {       selec++;  // Baixo       lcd.clear();     }     if (analogRead(A0) < 850 && analogRead(A0) > 835) { //Select       telap = false;       if (selec == 0) telah = true; // Tela de horas       if (selec == 1) telaa = true; // Tela do alarme       if (selec == 2) telac = true; // Tela de configuracao       lcd.clear();     }     Analise(); // Analisa se esta na hora de despertar     delay(200);   }

              //-----------------------------------------------------------------Tela Configuração do Relógio   int d1 = hour(), d2 = minute(), pos = 0; // Variaveis para a tela de configuração   while (telac) {      lcd.setCursor(5, 0);     if (d1 < 10) lcd.print("0"); lcd.print(d1); lcd.print(":"); if (d2 < 10) lcd.print("0"); lcd.print(d2);     if (pos == 0) {       lcd.setCursor(6, 1);  //Indica a posiçao da setinha       lcd.write(1);     }     if (pos == 1) {       lcd.setCursor(8, 1);       lcd.write(1);     }     //--------------------------------------------------------Testa os botoes     if (analogRead(A0) < 995 && analogRead(A0) > 985) { //Cima       if (pos == 0) if (d1 < 23) d1 ++;       if (pos == 1) if (d2 < 60) d2 ++;     }     if (analogRead(A0) < 980 && analogRead(A0) > 970) { //Baixo       if (pos == 0) if (d1 > 0) d1 --;       if (pos == 1) if (d2 > 0) d2 --;     }     if (analogRead(A0) < 935 && analogRead(A0) > 925) if (pos < 1) {         pos++;  //Direita         lcd.setCursor(6, 1);         lcd.print(" ");       }     if (analogRead(A0) < 920 && analogRead(A0) > 910) if (pos > 0) {         pos--;  //Esquerda         lcd.setCursor(6, 1);         lcd.print(" ");       }     if (analogRead(A0) < 850 && analogRead(A0) > 835) { //Select       setTime(d1, d2, 0, 11, 11, 2017);       telac = false; telap = true; lcd.clear();     }     Analise(); //Analisa se esta na hora de despertar     delay(100);   }

              //-----------------------------------------------------------------Tela de Alarme   d1 = alarme[0], d2 = alarme[1], pos = 0; //Variaveis para a tela de configuração   int d3 = ativado;   while (telaa) {      lcd.setCursor(0, 0);     if (d1 < 10) lcd.print("0"); lcd.print(d1); lcd.print(":"); if (d2 < 10) lcd.print("0"); lcd.print(d2);     lcd.setCursor(7, 0);     if (d3) lcd.print("Ativado");     if (!d3) {       lcd.setCursor(6, 0);       lcd.print("Desativado");     }     if (pos == 0) {       lcd.setCursor(1, 1);  // Indica a posiçao da setinha       lcd.write(1);     }     if (pos == 1) {       lcd.setCursor(3, 1);       lcd.write(1);     }     if (pos == 2) {       lcd.setCursor(10, 1);       lcd.write(1);     }     //--------------------------------------------------------Testa os botoes     if (analogRead(A0) < 995 && analogRead(A0) > 985) { //Cima       if (pos == 0) if (d1 < 23) d1 ++;       if (pos == 1) if (d2 < 60) d2 ++;       if (pos == 2) if (d3 < 1) {           d3 ++;           lcd.setCursor(6, 0);           lcd.print(" ");         }     }     if (analogRead(A0) < 980 && analogRead(A0) > 970) { //Baixo       if (pos == 0) if (d1 > 0) d1 --;       if (pos == 1) if (d2 > 0) d2 --;       if (pos == 2) if (d3 > 0) d3 --;     }     if (analogRead(A0) < 935 && analogRead(A0) > 925) if (pos < 2) {         pos++;  //Direita         lcd.setCursor(0, 1);         lcd.print(" ");       }     if (analogRead(A0) < 920 && analogRead(A0) > 910) if (pos > 0) {         pos--;  //Esquerda         lcd.setCursor(0, 1);         lcd.print(" ");       }     if (analogRead(A0) < 850 && analogRead(A0) > 835) { //Select       alarme[0] = d1;       alarme[1] = d2;       ativado = d3;       telaa = false; telap = true; lcd.clear();     }     Analise(); // Analisa se esta na hora de despertar     delay(100);   }   while (telah) { //-----------------------------------------------------------------Tela de horas     lcd.setCursor(3, 0);     lcd.print(getHour());     if (!espera && ativado) { // Simbolo do relogio caso o despertador esteja ativo       lcd.setCursor(15, 0);       lcd.write(2);     }     if (analogRead(A0) < 850 && analogRead(A0) > 835) { //Select       telah = false; telap = true; lcd.clear();     }     Analise();     delay(500);   }   delay(300); }

void Analise() { // Analisa se deu hora de despertar   if (hour() == alarme[0] && minute() == alarme[1] && !espera && ativado) {     lcd.clear();     lcd.setCursor(1, 0);     lcd.print("Segure select");     lcd.setCursor(3, 1);     lcd.print("para parar");     while (!espera) {       tocar(musica, duracao);       if (analogRead(A0) < 790 && analogRead(A0) > 555) espera = true;       delay(200);     }     lcd.clear();   }   if (espera && second() == 0 && ativado) {     espera = false;   } }

String getHour() { // Retorna uma string com a hora h:m:s   String saida = "";   if (hour() < 10)     saida += "0";   saida += hour();   saida += ":";   if (minute() < 10)     saida += "0";   saida += minute();   saida += ":";   if (second() < 10)     saida += "0";   saida += second();   return saida; }

<p>void tocar(char* mus[], int tempo[]) {   int tom = 0;   for (int i = 0; mus[i] != "Fim"; i++) {     if (mus[i] == "Do") tom = 262;     if (mus[i] == "Re") tom = 294;     if (mus[i] == "Mi") tom = 330;     if (mus[i] == "Fa") tom = 349;     if (mus[i] == "Sol") tom = 392;     if (mus[i] == "La") tom = 440;     if (mus[i] == "Si") tom = 494;     if (mus[i] == "Do#") tom = 528;     if (mus[i] == "Re#") tom = 622;     if (mus[i] == "Fa#") tom = 370;     if (mus[i] == "Sol#") tom = 415;     if (mus[i] == "La#") tom = 466;     if (mus[i] == "Pausa") tom = 0;     tone(buz, tom, tempo[i]);     delay(tempo[i]);     if (analogRead(A0) < 995 && analogRead(A0) > 835) {       espera = true;  // CONDIÇAO DO DESPERTADOR - Não tem relação com essa função       break;     }   } }</p>

Step 6: How to Use the Alarm Clock

Before you start actually using the alarm clock, there are a few things you should know:

The potentiometer is used to regulate the luminosity of the screen. Rotate it to see what's best for you;
To see the function of each button, check the second image above.

With that in mind, let's change the clock and set the alarm.

There are three options in the main menu: "Mostrar horas", "Definir alarme" and "Mudar as horas". To choose one, use the UP, DOWN and SELECT buttons. Firstly, you should go to "Mudar as horas" and change the time according to another clock or your cell phone, using the UP, DOWN, RIGHT, LEFT and SELECT buttons. Then, press SELECT to go back to the main menu. Now, go to "Definir alarme" to set the alarm. Using the LEFT, RIGHT and SELECT buttons, choose when you want the alarm to ring. When it does, the buzzer will ring until you press SELECT to stop it.

Go to https://drive.google.com/a/escolaeleva.com.br/fil.. to check out the alarm clock working!

Step 7: My Experience

Although we faced some challenges along the way, me and my group managed to overcome them all with the help of our teachers (and Google, of course :)

I think this was a very challenging project, but it was really fun to see it work!

I hope you have a great experience as well!

If you have any questions, suggestions of improvements, or anything you'd like to talk about, please leave a comment bellow!

Be the First to Share

Recommendations

Anything Goes Contest 2021