3 Demonstrates analog input by reading an analog sensor on analog pin 0 and
4 turning on and off a light emitting diode(LED) connected to digital pin 13.
5 The amount of time the LED will be on and off depends on
6 the value obtained by analogRead().
9 * Potentiometer attached to analog input 0
10 * center pin of the potentiometer to the analog pin
11 * one side pin (either one) to ground
12 * the other side pin to +5V
13 * LED anode (long leg) attached to digital output 13
14 * LED cathode (short leg) attached to ground
16 * Note: because most Arduinos have a built-in LED attached
17 to pin 13 on the board, the LED is optional.
20 Created by David Cuartielles
24 This example code is in the public domain.
26 http://arduino.cc/en/Tutorial/AnalogInput
28 Modified by A.Manni for using a 2.4k Pot with 2 5k resistors
29 Range = (1024 - offset) * 1024 / (1024 - offset)
30 Range can be defined with map(sensorValue, 724, 0124, 0, 1024)
31 Note: range is inverted
32 With serial debugging.
33 - Added initial limit for delay
37 int sensorPin = A0; // select the input pin for the potentiometer
38 int ledPin = 13; // select the pin for the LED
39 int sensorValue = 0; // variable to store the value coming from the sensor
40 int calValue = map(sensorValue, 723, 1024, 0, 1024) ; // variable to store calibrated value for the Pot
41 // This could be done with a map()
44 pinMode(ledPin, OUTPUT); // declare the ledPin as an OUTPUT:
50 // read the value from the sensor:
51 sensorValue = analogRead(sensorPin);
54 digitalWrite(ledPin, HIGH);
55 // stop the program for <sensorValue> milliseconds:
57 // turn the ledPin off:
58 digitalWrite(ledPin, LOW);
59 // stop the program for for <sensorValue> milliseconds:
60 // Range = (1024 - offset) * 1024 / (1024 - offset)
61 // calValue = (sensorValue -723 ) * 3.4 ;
63 Serial.print("Sensor Value: ") ;
64 Serial.println(sensorValue);
65 Serial.print("Adjusted value: ") ;
66 Serial.println(calValue);