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#include<Servo.h>
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Servo myServo;
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int potVal;
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int anglePosition;
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void setup()
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{
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  myServo.attach(9);
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}
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void loop()
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{
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  potVal = analogRead(A0);
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  anglePosition = map(potVal, 0, 1023, 10, 170);
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  myServo.write(anglePosition);
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  delay(20);
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}