如何创建一个Arduino控制的厨房计时器

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描述

厨房定时器用户界面流程

打开电源后,设备将显示“Arduino Kitchen Timer”消息3秒钟。

然后计时器将提示您设置时间。您可以通过按左右键将光标移动到分钟和小时。

您可以使用向上和向下箭头键调整分钟和小时设置。

设置了所需的时间后,按下选择按钮,计时器将启动。

如果您想再次设置时间,请再次按下选择按钮。

一旦时间结束,蜂鸣器将发出蜂鸣声。

要停止蜂鸣器,请按键盘护罩上的重置按钮。

厨房定时器所需的组件

Arduino

LCD键盘护盾

蜂鸣器

厨房定时器的威廉希尔官方网站 图

首先,对齐并放置L CD Keypad直接屏蔽Arduino。然后将蜂鸣器的正极连接到Arduino上的引脚12,将蜂鸣器的负极连接到地面。

Arduino厨房定时器项目代码

将以下代码复制并上传到Arduino IDE中。代码的每个部分都有一个附带的解释,以帮助您了解它的功能。

#include

// select the pins used for the LCD keypad

LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

// define some variables

int lcd_key = 0;

int adc_key_in = 0;

int hrs = 0;

int mins = 0;

int set_mins = 0;

int set_hrs = 1;

int secs = 60;

int cursor_pos = 1;

int buzzer_pin = 12;

bool startTimer = false;

bool setTimer = true;

bool get_time = false;

unsigned long interval=1000; // the time we need to wait

unsigned long previousMillis=0; // millis() returns an unsigned long.

// Defining button used by the lcd keypad

#define btnRIGHT 0

#define btnUP 1

#define btnDOWN 2

#define btnLEFT 3

#define btnSELECT 4

#define btnNONE 5

// read the buttons

int read_LCD_buttons()

{

adc_key_in = analogRead(0); // reading the button value from the lcd keypad

// checking which button is pressed

if (adc_key_in 》 1000) return btnNONE; // We make this the 1st option for speed reasons since it will be the most likely result

if (adc_key_in 《 50) return btnRIGHT;

if (adc_key_in 《 250) return btnUP;

if (adc_key_in 《 450) return btnDOWN;

if (adc_key_in 《 650) return btnLEFT;

if (adc_key_in 《 850) return btnSELECT;

return btnNONE; // when all others fail, return this.。.

}

void setup()

{

Serial.begin(115200);

pinMode(buzzer_pin, OUTPUT);

lcd.begin(16, 2); // start communication with LCD keypad shield

lcd.setCursor(0,0);

lcd.print(“Arduino Kitchen”);

lcd.setCursor(0, 1);

lcd.print(“ Timer”);

delay(3000);

}

void loop(){

// Checking which condition is true based on the button pressed

if(startTimer == true){

start_timer();

}

else if (setTimer == true){

set_timer();

}

}

// This function will count the time and will beep the buzzer when the time will be up.

void start_timer(){

// Checking whether time is up or not

if(hrs == 0 && mins == 0 && secs == 0){

lcd.setCursor(0, 0);

lcd.print(“ Time is UP”);

lcd.setCursor(0, 1);

lcd.print(“ Beep Beep”);

digitalWrite(buzzer_pin, HIGH);

delay(500);

digitalWrite(buzzer_pin, LOW);

delay(500);

}

else if(secs 《 0){

secs = 59;

mins = mins - 1;

}

else if(mins 《 0){

mins = 59;

hrs = hrs - 1;

}

else

{

get_time = true;

counter();

lcd.setCursor(0, 0);

lcd.print(“Timer is ON”);

lcd.setCursor(0, 1);

lcd.print(hrs);

lcd.print(“:”);

lcd.setCursor(4, 1);

lcd.print(mins);

lcd.print(“:”);

lcd.setCursor(8, 1);

lcd.print(secs);

}

lcd_key = read_LCD_buttons(); // read the buttons

switch (lcd_key) // depending on which button was pushed, we perform an action

{

// if select button is pressed, move back to set time

case btnSELECT:

{

startTimer = false;

setTimer = true;

delay(300);

lcd.clear();

break;

}

case btnNONE:

{

break;

}

}

}

// This function will set the time

void set_timer(){

counter();

lcd.setCursor(0, 0);

lcd.print(“Set Time”);

lcd.setCursor(0, 1);

lcd.print(“Hrs:”);

lcd.print(hrs);

lcd.setCursor(8, 1);

lcd.print(“Mins:”);

lcd.print(mins);

lcd.setCursor(0,1);

lcd_key = read_LCD_buttons(); // read the buttons

switch (lcd_key) // depending on which button was pushed, we perform an action

{

// if right button is pressed, then move the cursor to minutes

case btnRIGHT:

{

cursor_pos = set_mins;

break;

}

// if left button is pressed, then move the cursor to hours

case btnLEFT:

{

cursor_pos = set_hrs;

break;

}

// if up button is pressed, add 1 to the minutes or hours

case btnUP:

{

delay(300);

if(cursor_pos == set_mins){

mins++;

if(mins 》 59){

mins = 0;

}

}

else if(cursor_pos == set_hrs){

hrs++;

if(hrs 》 24){

hrs = 0;

}

}

break;

}

// if down button is pressed, minus 1 from the minutes or hours

case btnDOWN:

{

delay(300);

if(cursor_pos == set_mins){

mins--;

if(mins 《 0){

mins = 60;

}

}

else if(cursor_pos == set_hrs){

hrs--;

if(hrs 《 0){

hrs = 24;

}

}

break;

}

// if select button is pressed, start the timer

case btnSELECT:

{

startTimer = true;

setTimer = false;

mins = mins - 1;

delay(300);

break;

}

case btnNONE:

{

break;

}

}

}

void counter() {

unsigned long currentMillis = millis(); // grab current time

// check if “interval” time has passed (1000 milliseconds)

if ((unsigned long)(currentMillis - previousMillis) 》= interval) {

lcd.clear();

if(get_time == true){

secs--;

get_time = false;

}

previousMillis = millis();

}

}

创建厨房计时器只是一个开始!

您已经创建了自己的厨房计时器!该项目的最佳部分是能够调整该模块以构建其他项目,这些项目需要LCD和按钮或蜂鸣器之间的简单接口。您还可以为模块设计自定义3D打印的外壳,并使其成为您自己的。

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