Week 9 assignment

Concept

So basically, I made this little setup where I can control two LEDs using a knob and a button. One fades in and out smoothly when you twist the knob, and the other just pops on and off when you hit the button. It’s honestly pretty straightforward, but it was actually kind of fun to put together.

Demo

How It Works

The Knob: There’s a potentiometer, when you turn it, one of the LEDs gets brighter or dimmer. Twist one way and the light fades down, twist the other way and it gets brighter.

The Button: The other LED is even simpler. Press the button, light’s on. Let go, light’s off. That’s it.

Code

int pushButton = 2;
int led1 = 4;
int potentiometer = A5;
int led2 = 3;
void setup()
{
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(pushButton, INPUT);
pinMode(potentiometer, INPUT);
}
void loop()
{
// digital sensor (switch) controlling ON/OFF state of LED
int buttonState = digitalRead(pushButton);
if (buttonState == HIGH){
digitalWrite(led1, HIGH);
}
else if (buttonState == LOW) {
digitalWrite(led1, LOW);
}
// analog sensor (potentiometer) controlling the brightness of LED
int potValue = analogRead(potentiometer);
int brightness = map(potValue, 0, 1023, 0, 255);
analogWrite(led2, brightness);
}