Published June 13, 2020 © GPL3+

Arduino Time Adjustable Relay Project

Would you like to control a device by entering the time information?

BeginnerFull instructions provided10,576

Things used in this project

Hardware components

Arduino UNO

SEVEN-SEGMENT LED DISPLAY 4X

LED BUTTON BOARD

RELAY BOARD 5V

Story

Arduino Time Adjustable Relay Project

In this project, we enter the minutes and seconds data with the buttons. We press the run button and the relay changes position.The device connected to the output of the relay is working. The minutes and seconds count down values. When it is zero, the device at the output of the relay stops.You can add new features to the project.

We see the seven-segment display on many devices our daily life. They are generally operated by scanning method.

Relay Project

SEVEN-SEGMENT LED DISPLAY 4X

Let's examine the schematic drawings.

Schematic

Two types of seven-segment display screens are produced.These screens are known as cathode common and anode common. The appropriate screen is used according to the needs of the project. In our project, anode common display screen is used.

Relay module

Relay schematic

We need one relay in the project. We see the module that I designed with 5V coil voltage.

Button and Led module

Button schematic

Data entry is one of the most important issues in embedded electronic systems. In our project minute and second data are entered with the help of buttons.

I design developer tools with Altium Designer software.You can buy design files. You can use it in new projects.

Altium Designer Projects

https://www.altiumdesignerprojects.com

Project Schematic

https://www.altiumdesignerprojects.com/product/seven-segment-led-display-4x

https://www.altiumdesignerprojects.com/product/led-button-board

https://www.altiumdesignerprojects.com/product/relay-5v

Thanks.

You can follow me.I will share my projects with you.

#include <SevenSeg.h>

/*
 
 Hello 

 I design developer tools for embedded electronic systems.
 You can buy my projects design files.
 https://www.altiumdesignerprojects.com

*/
SevenSeg disp(4,5,6,7,8,9,10);  // https://github.com/sigvaldm/SevenSeg
//            A,B,C,D,E,F,G
//DIGIT PORT  0 1 2 3 4 5 6     // my seven-segment display project
        
int digitPins[4]={3,2,1,0};
//               D1,D2,D3,D4
// SCAN PORT     T4,T3,T2,T1    // my seven-segment display project
 
char displaybuffer[4] = "0000";

word number = 0;

void setup() {

 disp.setDigitPins(4, digitPins);
 disp.setCommonAnode();
 disp.setActivePinState(HIGH,HIGH);
 disp.setTimer(2);
 disp.startTimer();

}  

void loop() {
  
 disp.write(displaybuffer);
 
 displaybuffer[0] = number / 1000     + 48;   //   1 
 displaybuffer[1] = number / 100 % 10 + 48;   //   2
 displaybuffer[2] = number / 10  % 10 + 48;   //   3
 displaybuffer[3] = number % 10       + 48;   //   4
 
 number++;
 delay(500);

}

ISR(TIMER2_COMPA_vect){
  disp.interruptAction();
}

#include <SevenSeg.h>

/*
 
 Hello 

 I design developer tools for embedded electronic systems.
 You can buy my projects design files.
 https://www.altiumdesignerprojects.com

*/

SevenSeg disp(4,5,6,7,8,9,10);  // https://github.com/sigvaldm/SevenSeg
//            A,B,C,D,E,F,G

int digitPins[4]={3,2,1,0};
//               D1,D2,D3,D4

char displaybuffer[4] = "0000";

byte Minute;
byte Second;

void setup() {

 disp.setDigitPins(4, digitPins);
 disp.setCommonAnode();
 disp.setActivePinState(HIGH,HIGH);
 disp.setTimer(2);
 disp.startTimer();

 Minute = 12;
 Second = 34;

}  

void loop(){

 displaybuffer[0] = Minute / 10  + 48;   
 displaybuffer[1] = Minute % 10  + 48;
 displaybuffer[2] = Second / 10  + 48;
 displaybuffer[3] = Second % 10  + 48;

 disp.write(displaybuffer);

}

ISR(TIMER2_COMPA_vect){
  disp.interruptAction();
}

/*
 
 Hello 

 I design developer tools for embedded electronic systems.
 You can buy my projects design files.
 https://www.altiumdesignerprojects.com

*/

word MilliSecond = 0; 
byte Second = 0;
byte Minute = 0;
byte lastSecond;
bool timerStart = false;

char rx_byte;

void setup(){
 Serial.begin(9600);

 noInterrupts();         // disable all interrupts
 TCCR1A = 0;             // set entire TCCR1A register to 0  //set timer1 interrupt at 1kHz  // 1 ms
 TCCR1B = 0;             // same for TCCR1B
 TCNT1  = 0;             // set timer count for 1khz increments
 OCR1A = 1999;           // = (16*10^6) / (1000*8) - 1
 //had to use 16 bit timer1 for this bc 1999>255, but could switch to timers 0 or 2 with larger prescaler
 // turn on CTC mode
 TCCR1B |= (1 << WGM12); // Set CS11 bit for 8 prescaler
 TCCR1B |= (1 << CS11);  // enable timer compare interrupt
 TIMSK1 |= (1 << OCIE1A);
 interrupts();           // enable

}

void loop(){
 
  if(Serial.available() > 0){       
    rx_byte = Serial.read();       
    if(rx_byte == '1'){
       timerStart = true; 
    }
    
    if(rx_byte == '2'){
       timerStart = false;
    }
    
    if(rx_byte == '3'){
       Second = 0;
    }
 }

  
} // loop

ISR(TIMER1_COMPA_vect){   
 
 if(timerStart == true){ 
    MilliSecond++;
    if(MilliSecond >= 1000){
       MilliSecond = 0;
       Second++;
       if(Second >= 60){
          Second = 0;
          Minute++;
          if(Minute >= 60){
             Minute = 0;
          }
       }
    }

   if(Second != lastSecond){
      Serial.println("Time -- " + String(Minute) +":"+ String(Second));  
   }
   lastSecond = Second;    
 }
 
}

/*
 
 Hello 

 I design developer tools for embedded electronic systems.
 You can buy my projects design files.
 https://www.altiumdesignerprojects.com

*/

word MilliSecond = 0; 
byte Second = 0;
byte Minute = 0;
byte lastSecond;
bool timerStart = false;

char rx_byte;

void setup(){
 Serial.begin(9600);

 noInterrupts();         // disable all interrupts
 TCCR1A = 0;             // set entire TCCR1A register to 0  //set timer1 interrupt at 1kHz  // 1 ms
 TCCR1B = 0;             // same for TCCR1B
 TCNT1  = 0;             // set timer count for 1khz increments
 OCR1A = 1999;           // = (16*10^6) / (1000*8) - 1
 //had to use 16 bit timer1 for this bc 1999>255, but could switch to timers 0 or 2 with larger prescaler
 // turn on CTC mode
 TCCR1B |= (1 << WGM12); // Set CS11 bit for 8 prescaler
 TCCR1B |= (1 << CS11);  // enable timer compare interrupt
 TIMSK1 |= (1 << OCIE1A);
 interrupts();           // enable

 Second = 45;
 Minute = 4;

}

void loop(){
 
  if(Serial.available() > 0){       
    rx_byte = Serial.read();       
    if(rx_byte == '1'){
       timerStart = true; 
    }
    
    if(rx_byte == '2'){
       timerStart = false;
    }
    
    if(rx_byte == '3'){
       Second = 0;
    }
 }

  
} // loop

ISR(TIMER1_COMPA_vect){   

 if(timerStart == true){ 
    MilliSecond++;
    if(MilliSecond >= 1000){
       MilliSecond = 0;
       Second--;
        if(Second >= 255){   
           Second = 59;
           Minute--;
         if(Minute >= 255){
            Second = 0;
            Minute = 0;
          }
        }
    }

   if(Second != lastSecond){
      Serial.println("Time -- " + String(Minute) +":"+ String(Second));  
   }
   lastSecond = Second;    
 }
  
}

#include <SevenSeg.h>

/*
 
 Hello 

 I design developer tools for embedded electronic systems.
 You can buy my projects design files.
 https://www.altiumdesignerprojects.com

*/

SevenSeg disp(4,5,6,7,8,9,10);   //  A,B,C,D,E,F,G
int digitPins[4]={3,2,1,0};      //  D1,D2,D3,D4

char displaybuffer[4] = "0000";
word MilliSecond = 0; 
byte Minute = 0;
byte Second = 0;
bool timerStart = false;

void setup(){

 disp.setDigitPins(4, digitPins);
 disp.setCommonAnode();
 disp.setActivePinState(HIGH,HIGH);
 disp.setTimer(0) ;
 disp.startTimer();

 noInterrupts();         // disable all interrupts
 TCCR1A = 0;             // set entire TCCR1A register to 0  //set timer1 interrupt at 1kHz  // 1 ms
 TCCR1B = 0;             // same for TCCR1B
 TCNT1  = 0;             // set timer count for 1khz increments
 OCR1A = 1999;           // = (16*10^6) / (1000*8) - 1
 //had to use 16 bit timer1 for this bc 1999>255, but could switch to timers 0 or 2 with larger prescaler
 // turn on CTC mode
 TCCR1B |= (1 << WGM12); // Set CS11 bit for 8 prescaler
 TCCR1B |= (1 << CS11);  // enable timer compare interrupt
 TIMSK1 |= (1 << OCIE1A);
 interrupts();           // enable
  
}  

void loop(){
 
 timerStart = true;
 
 displaybuffer[0] = Minute / 10  + 48;   
 displaybuffer[1] = Minute % 10  + 48;
 displaybuffer[2] = Second / 10  + 48;
 displaybuffer[3] = Second % 10  + 48;

 disp.write(displaybuffer);

}

ISR(TIMER0_COMPA_vect){
  disp.interruptAction ();
}


ISR(TIMER1_COMPA_vect){   
 
 if(timerStart == true){ 
    MilliSecond++;
    if(MilliSecond >= 1000){
       MilliSecond = 0;
       Second++;
       if(Minute >= 60){
          Minute = 0;
       }
    }
 }
 
}

#include <SevenSeg.h>
#include <Button.h>

/*
 
 Hello 

 I design developer tools for embedded electronic systems.
 You can buy my projects design files.
 https://www.altiumdesignerprojects.com

*/

SevenSeg disp(4,5,6,7,8,9,10); //  A,B,C,D,E,F,G
int digitPins[4]={3,2,1,0};    //  D1,D2,D3,D4

char displaybuffer[4] = "0000";

Button minutePlus  = Button(A0,BUTTON_PULLDOWN); // Minute +
Button minuteMinus = Button(A1,BUTTON_PULLDOWN); // Minute -

Button secondPlus  = Button(A2,BUTTON_PULLDOWN); // Second +
Button secondMinus = Button(A3,BUTTON_PULLDOWN); // Second -

Button startButton = Button(A4,BUTTON_PULLDOWN); // RUN

#define relayPin     A5  

word MilliSecond = 0; 
byte Second = 0;
byte Minute = 0;
byte lastSecond;
bool timerStart = false;
bool relayStatus = false;

const byte wait = 125;

void setup(){
 pinMode(relayPin, OUTPUT);
 
 disp.setDigitPins(4, digitPins);
 disp.setCommonAnode();
 disp.setActivePinState(HIGH,HIGH);
 disp.setTimer(2);
 disp.startTimer();

 noInterrupts();         // disable all interrupts
 TCCR1A = 0;             // set entire TCCR1A register to 0  //set timer1 interrupt at 1kHz  // 1 ms
 TCCR1B = 0;             // same for TCCR1B
 TCNT1  = 0;             // set timer count for 1khz increments
 OCR1A = 1999;           // = (16*10^6) / (1000*8) - 1
 //had to use 16 bit timer1 for this bc 1999>255, but could switch to timers 0 or 2 with larger prescaler
 // turn on CTC mode
 TCCR1B |= (1 << WGM12); // Set CS11 bit for 8 prescaler
 TCCR1B |= (1 << CS11);  // enable timer compare interrupt
 TIMSK1 |= (1 << OCIE1A);
 interrupts();           // enable

}  

void loop(){

if(relayStatus == false){   // status
  
 if(minutePlus.isPressed()){
    Minute++;
    delay(wait);    
     if(Minute >= 60){
        Second = 0;
        Minute = 0;
     }         
 } 

 if(minuteMinus.isPressed()){  
    Minute--;
    delay(wait);     
     if(Minute >= 255) {    
        Minute = 0;
     }    
 }

 if(secondPlus.isPressed()){
    Second++;
    delay(wait);
     if(Second >= 60){
        Second = 0;      
        Minute++;
     } 
 }

 if(secondMinus.isPressed()){
    Second--;
    delay(wait);    
     if(Minute == 0 && Second >= 255){  
        Second=0;
     } 
      if(Second >= 255 ){
         Second = 59;
         Minute--;
          if(Minute >= 255 ){            
             Minute = 0;
          }           
      } 
 }

 if(startButton.isPressed()){
    timerStart = true;
    relayStatus = true;
    digitalWrite(relayPin,HIGH);   // role on
    delay(50); 
 }
 
} // relaystatus


 displaybuffer[0] = Minute / 10  + 48;   
 displaybuffer[1] = Minute % 10  + 48;
 displaybuffer[2] = Second / 10  + 48;
 displaybuffer[3] = Second % 10  + 48;

 disp.write(displaybuffer);

} // loop

ISR(TIMER2_COMPA_vect){
  disp.interruptAction ();
}

ISR(TIMER1_COMPA_vect){   

 if(timerStart == true){ 
    MilliSecond++;
    if(MilliSecond >= 1000){
       MilliSecond = 0;
       Second--;
        if(Second >= 255){   
           Second = 59;
           Minute--;
         if(Minute >= 255){
            Second = 0;
            Minute = 0;
          }
        }
    }
 
 }
  
}

#include <SevenSeg.h>
#include <Button.h>

/*
 
 Hello 

 I design developer tools for embedded electronic systems.
 You can buy my projects design files.
 https://www.altiumdesignerprojects.com

*/

SevenSeg disp(4,5,6,7,8,9,10); //  A,B,C,D,E,F,G
int digitPins[4]={3,2,1,0};    //  D1,D2,D3,D4

char displaybuffer[4] = "0000";

Button minutePlus  = Button(A0,BUTTON_PULLDOWN); // Minute +
Button minuteMinus = Button(A1,BUTTON_PULLDOWN); // Minute -

Button secondPlus  = Button(A2,BUTTON_PULLDOWN); // Second +
Button secondMinus = Button(A3,BUTTON_PULLDOWN); // Second -

Button startButton = Button(A4,BUTTON_PULLDOWN); // RUN

#define relayPin     A5  

word MilliSecond = 0; 
byte Second = 0;
byte Minute = 0;
byte lastSecond;

bool timerStart = false;
bool relayStatus = false;

const byte wait = 150;

void setup(){
 pinMode(relayPin, OUTPUT);
 
 disp.setDigitPins(4, digitPins);
 disp.setCommonAnode();
 disp.setActivePinState(HIGH,HIGH);
 disp.setTimer(2);
 disp.startTimer();

 noInterrupts();         // disable all interrupts
 TCCR1A = 0;             // set entire TCCR1A register to 0  //set timer1 interrupt at 1kHz  // 1 ms
 TCCR1B = 0;             // same for TCCR1B
 TCNT1  = 0;             // set timer count for 1khz increments
 OCR1A = 1999;           // = (16*10^6) / (1000*8) - 1
 //had to use 16 bit timer1 for this bc 1999>255, but could switch to timers 0 or 2 with larger prescaler
 // turn on CTC mode
 TCCR1B |= (1 << WGM12); // Set CS11 bit for 8 prescaler
 TCCR1B |= (1 << CS11);  // enable timer compare interrupt
 TIMSK1 |= (1 << OCIE1A);
 interrupts();           // enable

}  

void loop(){

  if(relayStatus == false){   // status
    
     if(minutePlus.isPressed()){
        Minute++;
        delay(wait);    
         if(Minute >= 60){
            Second = 0;
            Minute = 0;
         }         
     } 
    
     if(minuteMinus.isPressed()){  
        Minute--;
        delay(wait);     
         if(Minute >= 255) {    
            Minute = 0;
         }    
     }
    
     if(secondPlus.isPressed()){
        Second++;
        delay(wait);
         if(Second >= 60){
            Second = 0;      
            Minute++;
         } 
     }
    
     if(secondMinus.isPressed()){
        Second--;
        delay(wait);    
         if(Minute == 0 && Second >= 255){  
            Second=0;
         } 
          if(Second >= 255 ){
             Second = 59;
             Minute--;
              if(Minute >= 255 ){            
                 Minute = 0;
              }           
          } 
     }
    
     if(startButton.isPressed()){
        timerStart = true;
        relayStatus = true;
        digitalWrite(relayPin,HIGH);   // role on
        delay(10); 
     }
   
  } // relaystatus

 displaybuffer[0] = Minute / 10  + 48;   
 displaybuffer[1] = Minute % 10  + 48;
 displaybuffer[2] = Second / 10  + 48;
 displaybuffer[3] = Second % 10  + 48;

 disp.write(displaybuffer);

} // loop

ISR(TIMER2_COMPA_vect){
  disp.interruptAction();
}

ISR(TIMER1_COMPA_vect){   

 if(timerStart == true){ 
    MilliSecond++;
    if(MilliSecond >= 1000){
       MilliSecond = 0;
       Second--;
        if(Second >= 255){   
           Second = 59;
           Minute--;
         if(Minute >= 255){
            Second = 0;
            Minute = 0;
            timerStart = false;
            relayStatus = false;
            digitalWrite(relayPin,LOW);            
          }
        }
    }
 }
 
}

Arduino Time Adjustable Relay Project

Things used in this project

Hardware components

Story

Let's examine the schematic drawings.

Altium Designer Projects

Project Schematic

Code

1_DSP_COUNTER.ino

2_DSP_TIME.ino

3_SECOND_UP_CONTROL.ino

4_SECOND_DOWN_CONTROL.ino

5_SECOND_DISPLAY.ino

6_BUTTONS_TIME.ino

7_TIMER_RELAY_PROJECT_UNO.ino

Credits

Comments

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Arduino Time Adjustable Relay Project

Arduino Time Adjustable Relay Project

Things used in this project

Hardware components

Story

Let's examine the schematic drawings.

Altium Designer Projects

Project Schematic

Code

1_DSP_COUNTER.ino

2_DSP_TIME.ino

3_SECOND_UP_CONTROL.ino

4_SECOND_DOWN_CONTROL.ino

5_SECOND_DISPLAY.ino

6_BUTTONS_TIME.ino

7_TIMER_RELAY_PROJECT_UNO.ino

Credits

Comments

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