Blink a LED by Pressing Button

const int LED=13;

const int BUTTON=7;

int a;

void setup()

{

pinMode(LED,OUTPUT);

pinMode(BUTTON,INPUT);

}

void loop()

{

a=digitalRead(BUTTON);

if(a==HIGH)

{

digitalWrite(LED,HIGH);

}

else

{

digitalWrite(LED,LOW);

}

Comments

Fade an led in and out

const int led=13; int i; void setup() { pinMode(led,OUTPUT); } void loop() { for(i=0;i<255;i++) { analogWrite(led,i); delay(10); } for(i=255;i>0;i--) { analogWrite(led,i); delay(10); } }

blinking a set of leds in particular pattern

int myCustomLed(int pin) { digitalWrite(pin,HIGH); delay(500); digitalWrite(pin,LOW); delay(500); } int reverseMyCustomLed(int pin) { digitalWrite(pin,LOW); delay(500); digitalWrite(pin,HIGH); delay(500); } int led1=13; int led2=12; int led3=11; int led4=10; int led5=9; int led6=8; int led7=7; int led8=6; int led9=5; int led10=4; int led11=3; int led12=2; void setup() { pinMode(led1,OUTPUT); pinMode(led2,OUTPUT); pinMode(led3,OUTPUT); pinMode(led4,OUTPUT); pinMode(led5,OUTPUT); pinMode(led6,OUTPUT); pinMode(led7,OUTPUT); pinMode(led8,OUTPUT); pinMode(led9,OUTPUT); pinMode(led10,OUTPUT); pinMode(led11,OUTPUT); pinMode(led12,OUTPUT); Serial.begin(9600); } void loop() { myCustomLed(led1); myCustomLed(led2); myCustomLed(led3); ...

TURN ON LED WHEN BUTTON IS PRESSED & KEEP IT ON AFTER BUTTON IS RELEASED & TURN OFF BY PRESSING BUTTON .

const int led=13; const int led1=12; const int button=7; int a,b,c; void setup() { pinMode(led,OUTPUT); pinMode(led1,OUTPUT); pinMode(button,INPUT); } void loop() { a=digitalRead(button); if((a==HIGH)&&(c==LOW)) { b=1-b; } c=a; if(b==1) { digitalWrite(led,HIGH); digitalWrite(led1,HIGH); } else { digitalWrite(led,LOW); digitalWrite(led1,LOW); } }

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