loading
/*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); }
}

Step 2:

<p>What a fun program! </p>

About This Instructable

284views

8favorites

License:

Bio: An Electrical Engineering Teacher in Athens Greece. Most of these small projects here, are constructed for enhancing the learning of the use of Arduino as ... More »
More by PanosA6:Toggle switch with Relay using Arduino Universal Logic Gates Implementer with Arduino Most simplest toggle switch with Arduino 
Add instructable to: