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| − | <syntaxhighlight lang="c">
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| − | /*
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| − | Analog input, digital output, serial output
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| − | Reads an analog input pin; T000070 Hall Sensor connected to I0 reacts
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| − | to the magnet direction and uses the result to light up a T010111 LED Module connected on O0.
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| − | Also prints the value of the Hall Sensor to the serial monitor.
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| − | created on 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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| − |
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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 Hall Sensor is attached to
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| − | const int digitalOutPin= O0; // Digital output pin that the LED is attached to
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| − |
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| − | int sensorValue = 0; // value read from the Linear pot
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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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| − | pinMode(digitalOutPin, OUTPUT);
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| − | }
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| − |
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| − | void loop() {
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| − | // read the analog in value:
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| − |
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| − | sensorValue = analogRead(analogInPin);
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| − | if (sensorValue < 505) { // notice that the normal value of the sensor is 510
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| − | digitalWrite(digitalOutPin, HIGH);
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| − | } else {
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| − | digitalWrite(digitalOutPin, LOW);
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| − | }
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| − | // print the results to the serial monitor:
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| − | Serial.print("Hall Sensor Value = " );
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| − | Serial.println(sensorValue);
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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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| − |
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| − | <syntaxhighlight>
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