Project I -9. Digital Clock using 6 Digit of 7-Segment with Set Buttons Based on Arduino

Digital Clock using 6 Digit of 7-Segment with Set Buttons

Arduino will be used to read RTC data (Real Time Clock). Data is obtained in the form of hour, minute, second, day to-, date, month and year.

In this project we will try create a digital clock with seven segment . The numbers displayed in each digit are displayed alternately from digits 1 through 6 with a 3mS / digit appearance pause so that the numbers appear at the same time. RTC used DS1307 as its clock source. As for setting hours, minutes and seconds using 3 push buttons ON which connected with certain pin Arduino.

Hardware Requirement

• Arduino Uno Board
• 6 Digit of 7-Segment with Common Anode
• RTC DS1307 Module
• 3 Push Button
• Power supply +5 Volt
• Jumper

7-Segment | Source                      RTC DS-1307 | Source

Push Button | Source

Block Diagram

Schematic

7-Segment CA Wiring | Source

Arduino - 7 Segment Wiring

Arduino - RTC Wiring

Arduino - Buttons Wiring

Source Code/Sketch

#include <Wire.h>
#define DS1307_ADDRESS 0x68
byte zero = 0x00;
byte nilai, i, f_kpd, menu;
byte second ,minute,hour, weekDay;
byte monthDay,month,year;
word kedip;
long lastButton = 0;
long delayAntiBouncing = 50;
byte seven_seg_digits[10][7] = { { 0,0,0,0,0,0,1 }, // = 0
{ 1,0,0,1,1,1,1 }, // = 1
{ 0,0,1,0,0,1,0 }, // = 2
{ 0,0,0,0,1,1,0 }, // = 3
{ 1,0,0,1,1,0,0 }, // = 4
{ 0,1,0,0,1,0,0 }, // = 5
{ 0,1,0,0,0,0,0 }, // = 6
{ 0,0,0,1,1,1,1 }, // = 7
{ 0,0,0,0,0,0,0 }, // = 8
{ 0,0,0,0,1,0,0 } // = 9
};
void setup()
{
pinMode(2, OUTPUT); //a
pinMode(3, OUTPUT);//b
pinMode(4, OUTPUT);//c
pinMode(5, OUTPUT);//d
pinMode(6, OUTPUT);//e
pinMode(7, OUTPUT);//f
pinMode(8, OUTPUT);//g
pinMode(9, OUTPUT);//dig 1
pinMode(10, OUTPUT);//dig 2
pinMode(11, OUTPUT);//dig 3
pinMode(12, OUTPUT);//dig 4
pinMode(13, OUTPUT);//dig 5
pinMode(A0, OUTPUT);//dig 6
pinMode(A1,INPUT);
pinMode(A2,INPUT);
pinMode(A3,INPUT);
digitalWrite(A1,HIGH);
digitalWrite(A2,HIGH);
digitalWrite(A3,HIGH);
Wire.begin();
}
void loop(){
bacaRTC();
tampilJam();
tampilMenit();
tampilDetik();
cekTombol();
}
void tampilJam(){
digitalWrite(9,LOW); digitalWrite(10,HIGH);
digitalWrite(11,HIGH); digitalWrite(12,HIGH);
digitalWrite(13,HIGH); digitalWrite(A0,HIGH);
sevenSegWrite(hour/10);
delay(3);
digitalWrite(9,HIGH); digitalWrite(10,LOW);
digitalWrite(11,HIGH); digitalWrite(12,HIGH);
digitalWrite(13,HIGH); digitalWrite(A0,HIGH);
sevenSegWrite(hour%10);
delay(3);
}
void tampilMenit(){
digitalWrite(9,HIGH); digitalWrite(10,HIGH);
digitalWrite(11,LOW); digitalWrite(12,HIGH);
digitalWrite(13,HIGH); digitalWrite(A0,HIGH);
sevenSegWrite(minute/10);
delay(3);
digitalWrite(9,HIGH); digitalWrite(10,HIGH);
digitalWrite(11,HIGH); digitalWrite(12,LOW);
digitalWrite(13,HIGH); digitalWrite(A0,HIGH);
sevenSegWrite(minute%10);
delay(3);
}
void tampilDetik(){
digitalWrite(9,HIGH); digitalWrite(10,HIGH);
digitalWrite(11,HIGH); digitalWrite(12,HIGH);
digitalWrite(13,LOW); digitalWrite(A0,HIGH);
sevenSegWrite(second/10);
delay(3);
digitalWrite(9,HIGH); digitalWrite(10,HIGH);
digitalWrite(11,HIGH); digitalWrite(12,HIGH);
digitalWrite(13,HIGH); digitalWrite(A0,LOW);
sevenSegWrite(second%10);
delay(3);
}
void sevenSegWrite(byte segment) {
byte pin = 2;
for (byte segCount = 0; segCount < 7; ++segCount) {
digitalWrite(pin, seven_seg_digits[segment][segCount]);
++pin;
}
}
byte decToBcd(byte val){
return ( (val/10*16) + (val%10) );
}
byte bcdToDec(byte val) {
return ( (val/16*10) + (val%16) );
}
void cekTombol(){
do{
//------------------------SET
if (digitalRead(A1)==0){
if ((millis() - lastButton) > delayAntiBouncing){
f_kpd=1;
menu++;
}
lastButton = millis();
}
//---------------------------up
else if(digitalRead(A2)==0){
if ((millis() - lastButton) > delayAntiBouncing){
if (menu==1){
++hour;
if (hour==24){
hour=0;
}
}
else if(menu==2){
++minute;
if (minute==60){
minute=0;
}
}
else if(menu==3){
++second;
if (second==60){
second=0;
}
}
}
lastButton = millis();
}
//----------------------------DOWN
else if(digitalRead(A3)==0){
if ((millis() - lastButton) > delayAntiBouncing){
if (menu==1){
--hour;
if (hour==255){
hour=23;
}
}
else if(menu==2){
--minute;
if (minute==255){
minute=59;
}
}
else if(menu==3){
--second;
if (second==255){
second=59;
}
}
}
lastButton = millis();
}
if (menu==1 && kedip<30){
tampilMenit();
tampilDetik();
}
else if (menu==2 && kedip<30){
tampilJam();
tampilDetik();
}
else if (menu==3 && kedip<30){
tampilJam();
tampilMenit();
}
else{
tampilJam();
tampilMenit();
tampilDetik();
if(kedip>60)kedip=0;
}
++kedip;
if (menu==4){
setingRTC();
f_kpd=0;
}
}
while(f_kpd);
menu=0;
}
void bacaRTC(){
Wire.beginTransmission(DS1307_ADDRESS);
Wire.write(zero);
Wire.endTransmission();
Wire.requestFrom(DS1307_ADDRESS, 7);
second = bcdToDec(Wire.read());
minute = bcdToDec(Wire.read());
hour = bcdToDec(Wire.read() & 0b111111);
weekDay = bcdToDec(Wire.read());
monthDay = bcdToDec(Wire.read());
month = bcdToDec(Wire.read());
year = bcdToDec(Wire.read());
}
void setingRTC(){
Wire.beginTransmission(DS1307_ADDRESS);
Wire.write(zero); //stop RTC
Wire.write(decToBcd(second));
Wire.write(decToBcd(minute));
Wire.write(decToBcd(hour));
Wire.write(decToBcd(weekDay));
Wire.write(decToBcd(monthDay));
Wire.write(decToBcd(month));
Wire.write(decToBcd(year));
Wire.write(zero); //start
Wire.endTransmission();
}

How it Works

1. Connect the Arduino with Peripherals needed.
2. Plug in the Power Source on the device.

3. Add some library if needed

4. Compile and upload the script program above to your arduino.
5. The first display on the seven segment

6. To change the daata just press "SET" button, so on clock digit will blink, then press UP button to
     increase clock or press DOWN button to decrease clock

7. Do with the same direction like number 6th to change the minutes and second.

8. If youve finished to setting the clock data, press SET button once again to save it.

Video for Project I -9. Digital Clock using 6 Digit of 7-Segment with Set Buttons Based on Arduino

Required file