SharKode
Published © GPL3+

Digital Clock

Basically a digital clock that can have the time changed at the press of a button.

IntermediateWork in progress16,363
Digital Clock

Things used in this project

Hardware components

Arduino UNO
Arduino UNO
×1
Single Turn Potentiometer- 10k ohms
Single Turn Potentiometer- 10k ohms
×1
Standard LCD - 16x2 White on Blue
Adafruit Standard LCD - 16x2 White on Blue
×1
Pushbutton switch 12mm
SparkFun Pushbutton switch 12mm
×1
220 ohm resisitors
×1
Resistor 10k ohm
Resistor 10k ohm
×5

Software apps and online services

Arduino IDE
Arduino IDE

Story

Read more

Schematics

Schematic of wiring.

Just the schematic.

Code

My code!

C/C++
Here is the code in case anybody wants to try it for themselves.
#include <LiquidCrystal.h>
//to change time, hold chanage time button for 1 second, then use hour chnage and minute change buttons.

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int hour = 12;
int minutes = 0;
int seconds = 0;
int decBtn = 10;
int hrUp = 9;
int hrDwn = 8;
int minUp = 7;
int minDwn = 6;
int hrUpDec = 0;
int hrDwnDec = 0;
int minUpDec = 0;
int minDwnDec = 0;

void setup() {
  lcd.begin(16, 2);
  pinMode(decBtn, INPUT);
  pinMode(hrUp, INPUT);
  pinMode(hrDwn, INPUT);
  pinMode(minUp, INPUT);
  pinMode(minDwn, INPUT);
}

void loop() {
  if (digitalRead(decBtn) == HIGH) {
    if (digitalRead(hrUp) == HIGH && hrUpDec == 0) {
      hrUpDec = 1;
      hour = hour + 1;
    } else if (digitalRead(hrUp) == LOW) {
      hrUpDec = 0;
    }
    if (digitalRead(hrDwn) == HIGH && hrDwnDec == 0) {
      hrDwnDec = 1;
      hour = hour - 1;
    } else if (digitalRead(hrDwn) == LOW) {
      hrDwnDec = 0;
    }
    if (digitalRead(minUp) == HIGH && minUpDec == 0) {
      minUpDec = 1;
      minutes = minutes + 1;
    } else if (digitalRead(minUp) == LOW) {
      minUpDec = 0;
    }
    if (digitalRead(minDwn) == HIGH && minDwnDec == 0) {
      minDwnDec = 1;
      minutes = minutes - 1;
    } else if (digitalRead(minDwn) == LOW) {
      minDwnDec = 0;
    }
    seconds = 0;
    lcd.clear();
    if (minutes == 60) {
      minutes = 0;
      hour = hour + 1;
    }
    if (minutes < 0) {
      minutes = 59;
    }
    if (hour == 13) {
      hour = 1;
    }
    if (hour < 1) {
      hour = 12;
    }
    lcd.print(hour);
    lcd.print(":");
    if (minutes < 10) {
      lcd.print(0);
    }
    lcd.print(minutes);
    delay(20);
  } else if (digitalRead(decBtn) == LOW) {
    lcd.clear();
    if (seconds == 60) {
      seconds = 0;
      minutes = minutes + 1;
    }
    if (minutes == 60) {
      minutes = 0;
      hour = hour + 1;
    }
    if (minutes < 0) {
      minutes = 59;
    }
    if (hour == 13) {
      hour = 1;
    }
    if (hour < 1) {
      hour = 12;
    }
    lcd.print(hour);
    lcd.print(":");
    if (minutes < 10) {
      lcd.print(0);
    }
    lcd.print(minutes);
    delay(1000);
    lcd.clear();
    seconds = seconds + 1;
  }
}

Credits

SharKode

SharKode

1 project • 6 followers

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