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arduinisten/arduino-0022-linux-x64/examples/3.Analog/AnalogInOutSerial/AnalogInOutSerial.pde

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2010-03-30 20:09:55 +02:00
/*
Analog input, analog output, serial output
Reads an analog input pin, maps the result to a range from 0 to 255
and uses the result to set the pulsewidth modulation (PWM) of an output pin.
Also prints the results to the serial monitor.
The circuit:
* potentiometer connected to analog pin 0.
Center pin of the potentiometer goes to the analog pin.
side pins of the potentiometer go to +5V and ground
* LED connected from digital pin 9 to ground
created 29 Dec. 2008
2011-02-23 21:47:18 +01:00
Modified 4 Sep 2010
2010-03-30 20:09:55 +02:00
by Tom Igoe
2011-02-23 21:47:18 +01:00
This example code is in the public domain.
2010-03-30 20:09:55 +02:00
*/
// These constants won't change. They're used to give names
// to the pins used:
2011-02-23 21:47:18 +01:00
const int analogInPin = A0; // Analog input pin that the potentiometer is attached to
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const int analogOutPin = 9; // Analog output pin that the LED is attached to
int sensorValue = 0; // value read from the pot
int outputValue = 0; // value output to the PWM (analog out)
void setup() {
// initialize serial communications at 9600 bps:
Serial.begin(9600);
}
void loop() {
// read the analog in value:
sensorValue = analogRead(analogInPin);
// map it to the range of the analog out:
outputValue = map(sensorValue, 0, 1023, 0, 255);
// change the analog out value:
analogWrite(analogOutPin, outputValue);
// print the results to the serial monitor:
Serial.print("sensor = " );
Serial.print(sensorValue);
Serial.print("\t output = ");
Serial.println(outputValue);
// wait 10 milliseconds before the next loop
// for the analog-to-digital converter to settle
// after the last reading:
delay(10);
}