Question

FOR ARDUINO PROGRAMMING;

WRITE CODE TO FIT THE BELOW REQUIREMENTS;

1. LED 1 TURNS ON AND STAYS ON THE ENTIRE TIME THE BOARD IS RUNNING EXCEPT AT 30 SECOND INTERVALS THEN LED 1 TURNS OFF AND BACK ON

2. LED 2 TURNS ON IN LIGHT CONDITIONS AND OFF IN DARK CONDITION

THANK YOU!

Answer 1

Please up vote ,comment if any query . Thanks for question . Be safe .

Note : check attached image for output ,code compiled and tested in Proteus VSM ,for code used in ARDUINO ide.

Program : led turn on and turn off at 30

int i=0;
int led=13; //led1 to PB5

void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(led, OUTPUT); //set output to led 1 and led2

}

// the loop function runs over and over again forever
void loop() {

    //if i==0 when program starts it value is 0
if(i==0)
{
    //turn on led 1
    digitalWrite(led, HIGH);
}
   else if(i==30) //if its 30 seconds
   {
      digitalWrite(led, LOW);   // turn off led1
      i=-1; //i=-1
   }

   ++i; //increment i
delay(1000);                 //delay of 1 second when i will 30 its 30 second led will turn off for 1 second


}

Program : turn on led2 when its light off when dark

int led2=12; //led2 to PB4
int ldrPin = A0; // select the input pin for LDR

void setup() {
// initialize digital pin LED_BUILTIN as an output.

pinMode(led2, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
int ldr = analogRead(ldrPin); // read the value from the sensor
if(ldr>=700) //if its light
    digitalWrite(led2, HIGH); //turn on led 2
else // its dark
    digitalWrite(led2, LOW); //turn off led2
  

delay(1000);                 //delay of 1 second


}

Simulation : when program run led1 is turn on

Simulation : when its 30 seconds

Simulation of LDR :

Please up vote ,comment if any query .