This example is for Wiring version 0024+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.
Increment Decrement. by BARRAGAN
Writing "a++" is equivalent to "a = a + 1". Writing "a--" is equivalent to "a = a - 1".
int current = 0; // variable the keeps which light must be turn on next
void setup() {
for(int i=0; i<8; i++) { // set pins 0-7 as outputs
pinMode(i, OUTPUT);
}
}
void loop() {
turn_all_off(); // turns all LEDs off
digitalWrite(current, HIGH); // set the current light ON
delay(200); // wait for 200ms
current++; // increment current LED
if(current > 7) { // range check, if last LED goes back to LED 0
current = 0;
}
}
void turn_all_off() { // function to turn off all the LEDs
for(int i=0; i<8; i++) { // connected to digital pins 0-7
digitalWrite(i, LOW);
}
}
