Week 3: Digital Input, Analog Input and Digital Output

Combo Lock

	int led_pin = 8;
	int switch_pin = 9;
	int pot_pin_1 = A1;
	int pot_pin_2 = A2;
	int pot_pin_3 = A3;
	int last_switch_state = LOW;

	void setup() {
	pinMode(led_pin, OUTPUT);
	pinMode(pot_pin_1, INPUT);
	pinMode(pot_pin_2, INPUT);
	pinMode(pot_pin_3, INPUT);
	pinMode(switch_pin, INPUT);

	Serial.begin(9600);
	}

	void loop() {
	int pot_one_reading = analogRead(pot_pin_1);
	delay(1);
	int pot_two_reading = analogRead(pot_pin_2);
	delay(1);
	int pot_three_reading = analogRead(pot_pin_3);
	delay(1);
	int switch_reading = digitalRead(switch_pin);

	// Potentiomenter position mapped to 0-9 digits
	int pot_one_digit = map(pot_one_reading, 0, 1024, 0, 10);
	int pot_two_digit = map(pot_two_reading, 0, 1024, 0, 10);
	int pot_three_digit = map(pot_three_reading, 0, 1024, 0, 10);
	Serial.print("\t");
	Serial.print(pot_one_digit);
	Serial.print("\t");
	Serial.print(pot_two_digit);
	Serial.print("\t");
	Serial.println(pot_three_digit);

	// Evaluate when switch is pressed
	if (last_switch_state == LOW && switch_reading != last_switch_state) {
	if (pot_one_digit == 3 && pot_two_digit == 6 && pot_three_digit == 9) {
	digitalWrite(led_pin, HIGH);
	} else {
	digitalWrite(led_pin, LOW);
	}
	}
	last_switch_state = switch_reading;

	delay(100);
	}

Serial Monitor for Output Using Arduino’s Serial Monitor to display current combo digits (because I was too lazy to do it with p5).