Led chaser

LED (generic)

Arduino IDE

Breadboard (generic)

Jumper wires (generic)

Arduino UNO

<pre ><code >int led1 = 2; int led2 = 3; int led3 = 4; int led4 = 5; int led5 = 6; int led6 = 7; int led7 = 8; int led8 = 9; int led9 = 10; int led10 = 11; int led11 = 12; int led12 = 13; void setup() { // put your setup code here, to run once: //initialize digital pin as output 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); } void loop() { // put your main code here, to run repeatedly: digitalWrite(led1, HIGH);//it mean to give 5v(high) to pins.here ,the led will be on. delay(1000);//1000 = 1 second digitalWrite(led2, HIGH); delay(1000); digitalWrite(led3, HIGH); delay(1000); digitalWrite(led4, HIGH); delay(1000); digitalWrite(led5, HIGH); delay(1000); digitalWrite(led6, HIGH); delay(1000); digitalWrite(led7, HIGH); delay(1000); digitalWrite(led8, HIGH); delay(1000); digitalWrite(led9, HIGH); delay(1000); digitalWrite(led10, HIGH); delay(1000); digitalWrite(led11, HIGH); delay(1000); digitalWrite(led12, HIGH); delay(1000); digitalWrite(led1, LOW);//it mean to give 0v(low) to pin.here, led will be off delay(1000); digitalWrite(led2, LOW); delay(1000); digitalWrite(led3, LOW); delay(1000); digitalWrite(led4, LOW); delay(1000); digitalWrite(led5, LOW); delay(1000); digitalWrite(led6, LOW); delay(1000); digitalWrite(led7, LOW); delay(1000); digitalWrite(led8, LOW); delay(1000); digitalWrite(led9, LOW); delay(1000); digitalWrite(led10, LOW); delay(1000); digitalWrite(led11, LOW); delay(1000); digitalWrite(led12, LOW); delay(1000); } </code></pre>

Led chaser

Fun with led's