Introduction: The NOT Gate With Arduino
/*Arduino_NOT_Logic_Gate. A simple circuit to view the NOT gate.
And exploring simple forms of code.
Change the code to buttonStatus == HIGH and see what happens.*/
int buttonPin = 2;
int ledPin = 8;
int buttonStatus = 0;
void setup() {
pinMode(ledPin, OUTPUT);
pinMode(buttonPin, INPUT);
}
void loop(){
buttonStatus = digitalRead(buttonPin);
if (buttonStatus == LOW) { // check if the button state is LOW if yes then turn the LED on
digitalWrite(ledPin, HIGH);
}
else { digitalWrite(ledPin, LOW); // else if the button state is HIGH turn the LED off
}
}
Step 1: Step 2 Variation
/*Arduino_NOT_Logic_Gate. Another variation in the code would be this*/
int buttonPin = 2;
int ledPin = 8;
int buttonStatus = 0;
void setup() {
pinMode(ledPin, OUTPUT);
pinMode(buttonPin, INPUT);
}
void loop(){
buttonStatus = digitalRead(buttonPin);
if (buttonStatus != HIGH) // if the button is not (!=) HIGH (hence LOW) turn on the LED
{digitalWrite(ledPin, HIGH); }
else { digitalWrite(ledPin, LOW); }
}