Beginner here, need help on a project of mine.

Projects Programming
1

Working on a little "game", to test reaction speed, got stuck on the first step of the whole project. I have an led that blinks every 2 seconds, and a buzzer that makes a sound if the button is pressed while the led is on. The problem is, pin 2 only reads when the led is on. I cannot figure out what's causing that. If I completely remove the code for the led, it works, the delay should not effect the code for the button since it's in a seperate void, I don't understand.

const int button = digitalRead(2);
const int greenLed = digitalRead(8);

void setup(){
Serial.begin(9600);
pinMode(2, INPUT);
pinMode(8, INPUT);
pinMode(4, OUTPUT);
pinMode(7, OUTPUT);
}

void loop(){
led();
buttonPress();
}

void led(){
digitalWrite(4,HIGH);
delay(500);
digitalWrite(4,LOW);
delay(2000);
}

void buttonPress(){

Serial.print(button);

if(button == HIGH && greenLed == HIGH){
tone(7,300,20);
}
}

2

(deleted)

3 
const int button = digitalRead(2);

does not mean that the pin is continuously read by the software.

You need to read the button in loop() or buttonPress(); simplified example below

const int button = 2;
...
...
void setup()
{
  pinMode(button, INPUT);
  ...
  ...
}

void loop()
{
  ...
  ...
}

void buttonPress()
{
  byte val = digitalread(button); 
  Serial.print(val);

  if(val == HIGH)
  {
    tone(7,300,20);
  }
}
4

sterretje:

const int button = digitalRead(2);

does not mean that the pin is continuously read by the software.

You need to read the button in loop() or buttonPress(); simplified example below

const int button = 2;

...
...
void setup()
{
  pinMode(button, INPUT);
  ...
  ...
}

tried it, still got the same problem

void loop()
{
  ...
  ...
}

void buttonPress()
{
  byte val = digitalread(button);
  Serial.print(val);

if(val == HIGH)
  {
    tone(7,300,20);
  }
}

5

since it's in a seperate void

It's called a function, not a void. Void is the return type of the function. Means the function returns nothing. Other functions return different types and they would have that type instead of void.