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| − | <syntaxhighlight lang="c">
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| − | /*
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| − | Analog input, analog output, serial output
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| − |
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| − | Reads an analog input pin, and T000090 LDR Analog Sensor connected to I0, maps the result to a range from 0 to 255
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| − | and uses the result to set the pulsewidth modulation (PWM) on a T010111 LED Module connected on O0.
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| − | Also prints the results to the serial monitor.
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| − |
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| − | created 29 Dec. 2008
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| − | Modified 4 Sep 2010
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| − | by Tom Igoe
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| − | modified 7 dec 2010
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| − | by Davide Gomba
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| − |
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| − | This example code is in the public domain.
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| − |
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| − | */
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| − | #define O0 11
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| − | #define O1 10
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| − | #define O2 9
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| − | #define O3 6
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| − | #define O4 5
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| − | #define O5 3
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| − | #define I0 A0
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| − | #define I1 A1
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| − | #define I2 A2
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| − | #define I3 A3
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| − | #define I4 A4
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| − | #define I5 A5
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| − |
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| − | // These constants won't change. They're used to give names
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| − | // to the pins used:
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| − | const int analogInPin = I0; // Analog input pin that the LDR is attached to
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| − | const int analogOutPin= O0; // Analog output pin that the LED is attached to
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| − |
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| − | int sensorValue = 0; // value read from the pot
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| − | int outputValue = 0; // value output to the PWM (analog out)
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| − |
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| − | void setup() {
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| − | // initialize serial communications at 9600 bps:
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| − | Serial.begin(9600);
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| − | }
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| − | void loop() {
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| − | // read the analog in value:
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| − | sensorValue = analogRead(analogInPin);
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| − | // map it to the range of the analog out:
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| − | outputValue = map(sensorValue, 0, 1023, 0, 255);
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| − | // change the analog out value:
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| − | analogWrite(analogOutPin, outputValue);
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| − |
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| − | // print the results to the serial monitor:
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| − | Serial.print("sensor = " );
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| − | Serial.print(sensorValue);
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| − | Serial.print("\t output = ");
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| − | Serial.println(outputValue);
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| − |
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| − | // wait 10 milliseconds before the next loop
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| − | // for the analog-to-digital converter to settle
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| − | // after the last reading:
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| − | delay(10);
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| − | }
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| − |
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| − | </syntaxhighlight>
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