Keyestudio ARDUINO maker learning kit Manual page 28

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val=analogRead(potpin);// read the analog value from the sensor and assign it to val
Serial.println(val);// display value of val
analogWrite(ledpin,val/4);// turn on LED and set up brightness （ maximum output of PWM is 255）
delay(10);// wait for 0.01 second
}
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Result
After downloading the program, when we rotate the potentiometer knob, we can see changes of
the displaying value, also obvious change of the LED brightness on the breadboard.
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