My first Arduino project – Pulse

OK, so it’s not really a project. And the circuit is just that used in the ARDX manual for CIRC-07. But the program is mine! It’s not very exciting, but then I expect first projects rarely are.

If you can’t tell from the video, the LED pulses and the two buttons control the speed of the pulse.


int ledPin = 9;

int inputPin1 = 3;

int inputPin2 = 2;

int val = 0;
void setup() {

  pinMode(ledPin, OUTPUT);

  pinMode(inputPin1, INPUT);

  pinMode(inputPin2, INPUT);

}
int value = 0;

int direction = 1;

int speed = 5;
void loop(){

 if (digitalRead(inputPin1) == LOW) {

   speed++;

   while (digitalRead(inputPin1) == LOW) {}

 }

 if (digitalRead(inputPin2) == LOW) {

   speed--;

   while (digitalRead(inputPin2) == LOW) {}

 }
  value = value + direction;

  if ((value > 254) || (value < 1)) { direction = direction * -1; }
  value = constrain(value, 0, 255);
  
  analogWrite(ledPin, value);
  if (speed < 1) {speed = 1; }
  if (speed > 30) {speed = 30; }

  delay(speed);