Just Work

Concept

For this particular assignment, I didn’t particularly aim for anything. I have been having issues with connecting some of the components of the arduino kit and getting them to work so I decided to strictly get stuff to work. I utilized three buttons, jumper wires, three LEDs, a potentiometer, and the arduino UNO board. Using the value read from the potentiometer as a delay time, the LEDs are blinked using different buttons. That’s basically what the setup does.

I’ve included the sketch below.

//set the pins for the button and leds
int firstKeyPin = 2;
int secondKeyPin = 3;
int thirdKeyPin = 4;

int led1 = 9;
int led2 = 10;
int led3 = 11;

void setup() {
  //set the button pins as inputs
  pinMode(firstKeyPin, INPUT_PULLUP);
  pinMode(secondKeyPin, INPUT_PULLUP);
  pinMode(thirdKeyPin, INPUT_PULLUP);

  // set leds for output
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);

}

void loop() {
  // read voltage from potentiometer
  int delay_time = analogRead(A0);

  if(digitalRead(firstKeyPin) == LOW){        //if the first key is pressed
    // turns on led1
    digitalWrite(led1, HIGH);
    // delays for the value read from the potentiometer
    delay(delay_time);
    // turns off led1
    digitalWrite(led1, LOW);
    // delays for the value read from the potentiometer
    delay(delay_time);
  }
  else if(digitalRead(secondKeyPin) == LOW){  //if the second key is pressed
    // turns on led2
    digitalWrite(led2, HIGH);
    // delays for the value read from the potentiometer
    delay(delay_time);
    // turns off led2
    digitalWrite(led2, LOW);
    // delays for the value read from the potentiometer
    delay(delay_time);
  }
  else if(digitalRead(thirdKeyPin) == LOW){   //if the third key is pressed
    // turns on led3
    digitalWrite(led3, HIGH);
    // delays for the value read from the potentiometer
    delay(delay_time);
    // turns off led3
    digitalWrite(led3, LOW);
    // delays for the value read from the potentiometer
    delay(delay_time);
  }
  else{
    // turns off all leds
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
  }
}

Ideas for Future Improvements

For future improvements, I hope it doesn’t take me as much time as it took me this time to get everything working properly.

I used the tinker kit circuit guide as a reference when I got stuck.