Testing Transistor Gates

testing_transistor_gates.ino

int pinA = 8;
int pinB = 9;
int lvlA;
int lvlB;
int delayTime = 3000;

void setup () {
  Serial.begin(9600);
  pinMode (pinA, OUTPUT);
  pinMode (pinB, OUTPUT);
}

void printMsg (int A, int B) {
  Serial.print("A: ");

  if (A == 0) {
    Serial.print("LOW");
  } 
  else {
    Serial.print("HIGH");
  }

  Serial.print(" B: ");
  if (B == 0) {
    Serial.print("LOW");
  } 
  else {
    Serial.print("HIGH");
  }

  Serial.print("\n");
}

void loop () {
  // A = 0, B = 0
  lvlA = LOW;
  lvlB = LOW;  
  printMsg(lvlA, lvlB);
  digitalWrite (pinA, lvlA);
  digitalWrite (pinB, lvlB);
  delay (delayTime);
  
  // A = 0, B = 1
  lvlA = LOW;
  lvlB = HIGH;
  printMsg(lvlA, lvlB);
  digitalWrite (pinA, lvlA);
  digitalWrite (pinB, lvlB);
  delay (delayTime);
  
  // A = 1, B = 0
  lvlA = HIGH;
  lvlB = LOW;
  printMsg(lvlA, lvlB);
  digitalWrite (pinA, lvlA);
  digitalWrite (pinB, lvlB);
  delay (delayTime);

  // A = 1, B = 1
  lvlA = HIGH;
  lvlB = HIGH;
  printMsg(lvlA, lvlB);
  digitalWrite (pinA, lvlA);
  digitalWrite (pinB, lvlB);
  delay (delayTime);  
}