8 LEDs - noelprobst/Arduino GitHub Wiki
/* ---------------------------------------------------------
* | Arduino Experimentation Kit Example Code |
* | CIRC-02 .: 8 LED Fun :. (Multiple LEDs) |
* ---------------------------------------------------------
*
* A few Simple LED animations
*
* For more information on this circuit http://tinyurl.com/d2hrud
*
*/
//LED Pin Variables
int ledPins[] = {2,3,4,5,6,9,10,11}; //An array to hold the pin each LED is connected to
//i.e. LED #0 is connected to pin 2, LED #1, 3 and so on
//to address an array use ledPins[0] this would equal 2
//and ledPins[7] would equal 9
/*
* setup() - this function runs once when you turn your Arduino on
* We the three control pins to outputs
*/
void setup()
{
//Set each pin connected to an LED to output mode (pulling high (on) or low (off)
for(int i = 0; i < (sizeof(ledPins)/sizeof(int)); i++){ //this is a loop and will repeat eight times
pinMode(ledPins[i],OUTPUT); //we use this to set each LED pin to output
} //the code this replaces is below
/* (commented code will not run)
* these are the lines replaced by the for loop above they do exactly the
* same thing the one above just uses less typing
pinMode(ledPins[0],OUTPUT);
pinMode(ledPins[1],OUTPUT);
pinMode(ledPins[2],OUTPUT);
pinMode(ledPins[3],OUTPUT);
pinMode(ledPins[4],OUTPUT);
pinMode(ledPins[5],OUTPUT);
pinMode(ledPins[6],OUTPUT);
pinMode(ledPins[7],OUTPUT);
(end of commented code)*/
}
/*
* loop() - this function will start after setup finishes and then repeat
* we call a function called oneAfterAnother(). if you would like a different behaviour
* uncomment (delete the two slashes) one of the other lines
*/
void loop() // run over and over again
{
//oneAfterAnotherNoLoop(); //this will turn on each LED one by one then turn each off
//oneAfterAnotherLoop(); //does the same as oneAfterAnotherNoLoop but with much less typing
//oneOnAtATime(); //this will turn one LED on then turn the next one on turning the
//former off (one LED will look like it is scrolling along the line
//inAndOut(); //lights the two middle LEDs then moves them out then back in again
for (int i=0;i<=10;i++){
randomLighting();
}
for (int i=0;i<=50;i++){
randomOnOff();
}
}
/*
* oneAfterAnotherNoLoop() - Will light one LED then delay for delayTime then light
* the next LED until all LEDs are on it will then turn them off one after another
*
* this does it without using a loop which makes for a lot of typing.
* oneOnAtATimeLoop() does exactly the same thing with less typing
*/
void oneAfterAnotherNoLoop(){
int delayTime = 250; //the time (in milliseconds) to pause between LEDs
//make smaller for quicker switching and larger for slower
digitalWrite(ledPins[0], HIGH); //Turns on LED #0 (connected to pin 2)
delay(delayTime); //waits delayTime milliseconds
digitalWrite(ledPins[1], HIGH); //Turns on LED #1 (connected to pin 3)
delay(delayTime); //waits delayTime milliseconds
digitalWrite(ledPins[2], HIGH); //Turns on LED #2 (connected to pin 4)
delay(delayTime); //waits delayTime milliseconds
digitalWrite(ledPins[3], HIGH); //Turns on LED #3 (connected to pin 5)
delay(delayTime); //waits delayTime milliseconds
digitalWrite(ledPins[4], HIGH); //Turns on LED #4 (connected to pin 6)
delay(delayTime); //waits delayTime milliseconds
digitalWrite(ledPins[5], HIGH); //Turns on LED #5 (connected to pin 7)
delay(delayTime); //waits delayTime milliseconds
digitalWrite(ledPins[6], HIGH); //Turns on LED #6 (connected to pin 8)
delay(delayTime); //waits delayTime milliseconds
digitalWrite(ledPins[7], HIGH); //Turns on LED #7 (connected to pin 9)
delay(delayTime); //waits delayTime milliseconds
//Turns Each LED Off
analogWrite(ledPins[0], 20); //Turns on LED #0 (connected to pin 2)
delay(delayTime); //waits delayTime milliseconds
analogWrite(ledPins[1], 20); //Turns on LED #1 (connected to pin 3)
delay(delayTime); //waits delayTime milliseconds
analogWrite(ledPins[2], 20); //Turns on LED #2 (connected to pin 4)
delay(delayTime); //waits delayTime milliseconds
analogWrite(ledPins[3], 20); //Turns on LED #3 (connected to pin 5)
delay(delayTime); //waits delayTime milliseconds
analogWrite(ledPins[4], 20); //Turns on LED #4 (connected to pin 6)
delay(delayTime); //waits delayTime milliseconds
analogWrite(ledPins[5], 20); //Turns on LED #5 (connected to pin 7)
delay(delayTime); //waits delayTime milliseconds
analogWrite(ledPins[6], 20); //Turns on LED #6 (connected to pin 8)
delay(delayTime); //waits delayTime milliseconds
analogWrite(ledPins[7], 20); //Turns on LED #7 (connected to pin 9)
delay(delayTime); //waits delayTime milliseconds
}
/*
* oneAfterAnotherLoop() - Will light one LED then delay for delayTime then light
* the next LED until all LEDs are on it will then turn them off one after another
*
* this does it using a loop which makes for a lot less typing.
* than oneOnAtATimeNoLoop() does exactly the same thing with less typing
*/
void oneAfterAnotherLoop(){
int delayTime = 100; //the time (in milliseconds) to pause between LEDs
//make smaller for quicker switching and larger for slower
//Turn Each LED on one after another
for(int i = 0; i <= 7; i++){
digitalWrite(ledPins[i], HIGH); //Turns on LED #i each time this runs i
delay(delayTime); //gets one added to it so this will repeat
} //8 times the first time i will = 0 the final
//time i will equal 7;
//Turn Each LED off one after another
for(int i = 7; i >= 0; i--){ //same as above but rather than starting at 0 and counting up
//we start at seven and count down
digitalWrite(ledPins[i], LOW); //Turns off LED #i each time this runs i
delay(delayTime); //gets one subtracted from it so this will repeat
} //8 times the first time i will = 7 the final
//time i will equal 0;
}
/*
* oneOnAtATime() - Will light one LED then the next turning off all the others
*/
void oneOnAtATime(){
int delayTime = 100; //the time (in milliseconds) to pause between LEDs
//make smaller for quicker switching and larger for slower
for(int i = 0; i <= 7; i++){
int offLED = i - 1; //Calculate which LED was turned on last time through
if(i == 0) { //for i = 1 to 7 this is i minus 1 (i.e. if i = 2 we will
offLED = 7; //turn on LED 2 and off LED 1)
} //however if i = 0 we don't want to turn of led -1 (doesn't exist)
//instead we turn off LED 7, (looping around)
digitalWrite(ledPins[i], HIGH); //turn on LED #i
digitalWrite(ledPins[offLED], LOW); //turn off the LED we turned on last time
delay(delayTime);
}
}
/*
* inAndOut() - This will turn on the two middle LEDs then the next two out
* making an in and out look
*/
void inAndOut(){
int delayTime = 100; //the time (in milliseconds) to pause between LEDs
//make smaller for quicker switching and larger for slower
//runs the LEDs out from the middle
for(int i = 0; i <= 3; i++){
int offLED = i - 1; //Calculate which LED was turned on last time through
if(i == 0) { //for i = 1 to 7 this is i minus 1 (i.e. if i = 2 we will
offLED = 3; //turn on LED 2 and off LED 1)
} //however if i = 0 we don't want to turn of led -1 (doesn't exist)
//instead we turn off LED 7, (looping around)
int onLED1 = 3 - i; //this is the first LED to go on ie. LED #3 when i = 0 and LED #0 when i = 3
int onLED2 = 4 + i; //this is the first LED to go on ie. LED #4 when i = 0 and LED #7 when i = 3
int offLED1 = 3 - offLED; //turns off the LED we turned on last time
int offLED2 = 4 + offLED; //turns off the LED we turned on last time
`digitalWrite(ledPins[onLED1], HIGH);`
`digitalWrite(ledPins[onLED2], HIGH); `
`digitalWrite(ledPins[offLED1], LOW); `
`digitalWrite(ledPins[offLED2], LOW); `
`delay(delayTime);`
}
//runs the LEDs into the middle
for(int i = 3; i >= 0; i--){
int offLED = i + 1; //Calculate which LED was turned on last time through
if(i == 3) { //for i = 1 to 7 this is i minus 1 (i.e. if i = 2 we will
offLED = 0; //turn on LED 2 and off LED 1)
} //however if i = 0 we don't want to turn of led -1 (doesn't exist)
//instead we turn off LED 7, (looping around)
int onLED1 = 3 - i; //this is the first LED to go on ie. LED #3 when i = 0 and LED #0 when i = 3
int onLED2 = 4 + i; //this is the first LED to go on ie. LED #4 when i = 0 and LED #7 when i = 3
int offLED1 = 3 - offLED; //turns off the LED we turned on last time
int offLED2 = 4 + offLED; //turns off the LED we turned on last time
`digitalWrite(ledPins[onLED1], HIGH);`
`digitalWrite(ledPins[onLED2], HIGH); `
`digitalWrite(ledPins[offLED1], LOW); `
`digitalWrite(ledPins[offLED2], LOW); `
`delay(delayTime);`
}
}
void randomLighting(){
int delayTime = random(20,501);
int howMany = random(0,9);
for(int i=0; i<=howMany; i++){
`int randElement = random(0,8);`
`digitalWrite(ledPins[randElement],HIGH);`
}
delay(delayTime);
digitalWrite(ledPins[0],LOW);
digitalWrite(ledPins[1],LOW);
digitalWrite(ledPins[2],LOW);
digitalWrite(ledPins[3],LOW);
digitalWrite(ledPins[4],LOW);
digitalWrite(ledPins[4],LOW);
digitalWrite(ledPins[5],LOW);
digitalWrite(ledPins[6],LOW);
digitalWrite(ledPins[7],LOW);
//delay(delayTime);
}
void randomOnOff(){
int randElement = random(0,8);
int dlay = random(20,101);
if (digitalRead(ledPins[randElement]) == LOW) {
digitalWrite(ledPins[randElement],HIGH);
} else {
digitalWrite(ledPins[randElement],LOW);
}
//Serial.print(randElement);
delay(dlay);
}