Arduino入門(1) 可変抵抗で圧電スピーカを鳴らす

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•

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• 1 3 →

• 1 2 →

• 1 3 -GND2

1 2 3

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• 1-3 10KΩ

• 1-3 5V-GND

• 2 Arduino

• GND-2Arduino

1 2 3

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• V= I R

• 5[mA]

• 2.5[mW]

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1 2 3

5V

10KΩ

Arduino

• 1 5V 3 GND

• 2 Arduino 0

• →5V

• →0V

0

int val = 0;

void setup(){Serial.begin( 9600 );

}void loop(){

val = analogRead( 0 );Serial.println( val );

}

Arduino IDE

• Arduino

• Arduino IDE Serial

• 0 1023

• 1023 0

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•Wikipedia

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5V

0V

Arduino

• ON/OFF

void setup(){pinMode( 9, OUTPUT );

}void loop(){

digitalWrite( 9, HIGH );delayMicroseconds( 1000 );digitalWrite( 9, LOW );delayMicroseconds( 1000 );

}

Arduino

• Arduino 9 GND

•ON OFF

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• 10KΩGND

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• delayMicroseconds analogRead

–入力値が大きいほど、低い音が鳴る

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int val = 0;void setup(){

pinMode( 9, OUTPUT );}void loop(){

val = analogRead( 0 );if ( val < 1023 ){ //

val += 500; //digitalWrite( 9, HIGH );delayMicroseconds( val );digitalWrite( 9, LOW );delayMicroseconds( val );

}}

• Arduino IDEFile > Examples > Digital > Melody

• 9

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URL

• 2008: Arduino

– http://kousaku-kousaku.blogspot.com/2008/07/arduino.html