32 lines
1.3 KiB
Arduino
32 lines
1.3 KiB
Arduino
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/*
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Knob
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Controlling a servo position using a potentiometer (variable resistor)
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by Michal Rinott <http://people.interaction-ivrea.it/m.rinott>
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Adapted by Philip van Allen <philvanallen.com> for the VarSpeedServo.h library (October 2013)
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This example code is in the public domain
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Moves a servo to a position, determined by a scaled value from an analog input, driven by a knob (potentiometer)
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Note that servos usually require more power than is available from the USB port - use an external power supply!
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*/
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#include <VarSpeedServo.h>
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VarSpeedServo myservo; // create servo object to control a servo
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const int potPin = 0; // analog pin used to connect the potentiometer
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const int servoPin = 9; // the digital pin used for the servo
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int val; // variable to read the value from the analog pin
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void setup() {
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myservo.attach(servoPin); // attaches the servo on pin 9 to the servo object
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}
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void loop() {
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val = analogRead(potPin); // reads the value of the potentiometer (value between 0 and 1023)
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val = map(val, 0, 1023, 0, 180); // scale it to use it with the servo (value from 0 and 180)
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myservo.write(val); // sets the servo position according to the scaled value
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delay(15); // waits a bit before the next value is read and written
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}
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