Throbber

Throbber.this.is.not.c

/*
 * "Throb" effect.
 *
 * Paul Tagliamonte, 2010.
 *
 *  This is a re-take on the classic "pulse" ( otherwise 
 *  known as the standby, throb, blob, mob or rob effect )
 *
 *  Yes, that was a joke. Lighten up, this is programming.
 *
 *  This was re-done to look nicer by my very personal
 *  coding standards. Done with much love at 2:00 AM
 *  because I can't sleep. Oh well.
 *
 *  This code is released under the Bacon license.
 *  If you like this code enough, consider sending me bacon.
 *
 *  That or GPL-3+. 
 *
 */
 
//  Cycle   <-- this is "static".
// +-----+
// |
// |ON      <-- this changes bunches
// +--+
// |
// |   OFF  <-- ( cycle - ON )
// |  +--+
// |
// +--+  +--+  +--+
// |  |  |  |  |  |
// |  |  |  |  |  |   ----> ( and so on )
// |  |  |  |  |  |
// |  |  |  |  |  |
// |  +--+  +--+  +-- 

int ledPin = 13;   // cute LED built into the Arduino

int cycle    = 30; //  miliseconds.
int on       = 20; //       "
int bottom   = 5;  // this is the flicker avoider
                   //  if we drop to 0, then it blanks out
                   //  and has a piss-poor blink. I know
                   //  we can put a cap between it, but it's
                   //  just too much work. I'll code around it
                   //  for now. If you don't like this, then
                   //  set it to 0. Much love.

int adder    = 1;  // this gets flipped around later.

void setup() {
    pinMode(ledPin, OUTPUT); // Vomit down this hole.
}

void loop() { // damn kids don't have an int main() { ... }

    on = on + adder; // on cycle length

    if ( on >= cycle || on <= bottom )
        adder = -adder; // if we're at the border, invert the adder

    //
    // Here's where the babymaking goes on
    //

    digitalWrite(ledPin, HIGH); // BRIGHT!
    delay(on);                  // Wait for it!
    digitalWrite(ledPin, LOW);  // Darker then my coffee
    delay(cycle - on);          // Wait for it!
    
    //
    // Lather, rinse and repeat.
    //
}