モールス信号練習機

 bounceをsketchして、押しボタン（電鍵の代わり）を押すとブザーが鳴り、同時にLEDが光る。
モールス信号の練習機をブレッドボード上で作成する。


Sketch


 /* bounce
   内部プルアップ抵抗20 ｋohmを有効にする
   The circuit:
   LED attached from pin 13 to ground
  This code turns a led on/off through a debounced button(keyingPin)
*/

#include <Bounce.h>
int buzzerPin=10;
int ledPin=13;
int keyingPin=19;
// Instantiate a Bounce object with a 5 millisecond debounce time
Bounce bouncer = Bounce( keyingPin,5 );

void setup() {
  pinMode(buzzerPin, OUTPUT);   // sets the pin as output
  pinMode(keyingPin,INPUT);    // sets the pin as input
  pinMode(ledPin,OUTPUT);      // sets the pin as output
  digitalWrite(keyingPin,HIGH);
}
void loop() {
  bouncer.update ( );              // Update the debouncer
 int value = bouncer.read();      // Get the update value
 if ( value == LOW) {            // Turn on or off the LED
   digitalWrite(ledPin, HIGH );
   analogWrite(buzzerPin,128);
 } else {
    digitalWrite(ledPin, LOW );
    analogWrite(buzzerPin, 0);
 }
}