int brightness = 0; // how bright the LED is
int fadeAmount = 5; // how many points to fade the LED by
void setup() {
// declare pin 9 to be an output:
pinMode(9, OUTPUT);
}
void loop() {
// set the brightness of pin 9:
analogWrite(9, brightness);
// change the brightness for next time through the loop:
brightness = brightness + fadeAmount;
// reverse the direction of the fading at the ends of the fade:
if (brightness == 0 || brightness == 255) {
fadeAmount = -fadeAmount ;
}
// wait for 30 milliseconds to see the dimming effect
delay(30);
}
/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.
This example code is in the public domain.
*/
// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
int led = 13;
int led2 = 12;
// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
pinMode(led, OUTPUT);
pinMode(led2, OUTPUT);
}
// the loop routine runs over and over again forever:
void loop() {
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
digitalWrite(led2, LOW); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
digitalWrite(led2, HIGH); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
Arduino創始人在TED大會的演說 （Massimo Banzi: How Arduino is open-sourcing）
練習01:暴力解-霹靂燈
//(1)設定檔
int ledPin1 = 8; // the number of the LED pin
int ledPin2 = 9; // the number of the LED pin
int ledPin3 = 10; // the number of the LED pin
//(2)setup 函式
void setup() {
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
pinMode(ledPin3, OUTPUT);
}
//(3)loop 函式
void loop() {
digitalWrite(ledPin1, HIGH);
delay(100);
digitalWrite(ledPin1, LOW);
delay(100);
digitalWrite(ledPin2, HIGH);
delay(100);
digitalWrite(ledPin2, LOW);
delay(100);
digitalWrite(ledPin3, HIGH);
delay(100);
digitalWrite(ledPin3, LOW);
delay(100);
digitalWrite(ledPin2, HIGH);
delay(100);
digitalWrite(ledPin2, LOW);
delay(100);
}
