Logic Gate Implementation

Solving Approach

How do you plan to solve it?

Code

int A = 2;   // switch A
int B = 3;   // switch B

int ledAND  = 4;
int ledOR   = 5;
int ledNAND = 6;
int ledNOR  = 7;

void setup() {
  pinMode(A, INPUT_PULLUP); 
  pinMode(B, INPUT_PULLUP);

  pinMode(ledAND, OUTPUT);
  pinMode(ledOR, OUTPUT);
  pinMode(ledNAND, OUTPUT);
  pinMode(ledNOR, OUTPUT);
}

void loop() {
  int a = !digitalRead(A); 
  int b = !digitalRead(B);

  digitalWrite(ledOR,   a || b);
  digitalWrite(ledAND,  a && b);
  digitalWrite(ledNAND, !(a && b));
  digitalWrite(ledNOR,  !(a || b));

  delay(50);
}

Output

Video