Week 12 , HW10

1. Ardunio 影片

2.Ardunio 程式碼

/*
  Analog Input
 Demonstrates analog input by reading an analog sensor on analog pin 0 and
 turning on and off a light emitting diode(LED)  connected to digital pin 13.
 The amount of time the LED will be on and off depends on
 the value obtained by analogRead().

 The circuit:
 * Potentiometer attached to analog input 0
 * center pin of the potentiometer to the analog pin
 * one side pin (either one) to ground
 * the other side pin to +5V
 * LED anode (long leg) attached to digital output 13
 * LED cathode (short leg) attached to ground

 * Note: because most Arduinos have a built-in LED attached
 to pin 13 on the board, the LED is optional.


 Created by David Cuartielles
 modified 30 Aug 2011
 By Tom Igoe

 This example code is in the public domain.

 http://arduino.cc/en/Tutorial/AnalogInput

 */
int sensorPin = A0;    // select the input pin for the potentiometer
int ledPin = 13;      // select the pin for the LED
int sensorValue = 0;  // variable to store the value coming from the sensor
void setup() {
  // declare the ledPin as an OUTPUT:
  Serial.begin(9600);
    pinMode(13, OUTPUT);
    pinMode(12, OUTPUT);
    pinMode(11, OUTPUT);
    pinMode(10, OUTPUT);
    pinMode(9, OUTPUT);
    pinMode(8, OUTPUT);
    pinMode(7, OUTPUT);
 
   
}
void loop() {
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin);
  Serial.println(sensorValue); 
  // turn the ledPin on
    digitalWrite(13, HIGH);
    digitalWrite(12, HIGH);
    digitalWrite(11, HIGH);
    digitalWrite(10, HIGH);
    digitalWrite(9, HIGH);
    digitalWrite(8, HIGH);
    digitalWrite(7, HIGH);
    delay(sensorValue);

    digitalWrite(13, LOW);
    digitalWrite(12, LOW);
    digitalWrite(11, LOW);
    digitalWrite(10, LOW);
    digitalWrite(9, LOW);
    digitalWrite(8, LOW);
    digitalWrite(7, LOW);
    delay(sensorValue);
 
  // stop the program for <sensorValue> milliseconds:
 // delay(sensorValue);         
  // turn the ledPin off:       
 // digitalWrite(ledPin, LOW);  
  // stop the program for for <sensorValue> milliseconds:
 // delay(sensorValue);                 
}

心得:
當時在試驗旋鈕調LED燈的閃爍速度時，一開始都旋轉快，一下子就扭到底發現他就會故障，試了幾次都會這樣，當時還一直搞不懂! 後來詢問同學才知道，原來旋鈕轉到極限，會使整個線路"爆掉"，所以在旋轉時只要旋轉小小的角度就可以達到我們影片中，路出來的效果囉!!