ARDUINO STARTER KIT

03 – AMOROMETRO

Video della preparazione del circuito

PROGRAMMAZIONE

/*
Arduino Starter Kit example
Project 3 – Love-O-Meter

This sketch is written to accompany Project 3 in the
Arduino Starter Kit

Parts required:
1 TMP36 temperature sensor
3 red LEDs
3 220 ohm resistors

Created 13 September 2012
by Scott Fitzgerald

http://www.arduino.cc/starterKit

This example code is part of the public domain
*/

// named constant for the pin the sensor is connected to
const int sensorPin = A0;
// room temperature in Celcius
const float baselineTemp = 20.0;

void setup() {
// open a serial connection to display values
Serial.begin(9600);
// set the LED pins as outputs
// the for() loop saves some extra coding
for (int pinNumber = 2; pinNumber < 5; pinNumber++) { pinMode(pinNumber, OUTPUT);
digitalWrite(pinNumber, LOW);
}
}

void loop() {
// read the value on AnalogIn pin 0
// and store it in a variable
int sensorVal = analogRead(sensorPin);

// send the 10-bit sensor value out the serial port
Serial.print(“sensor Value: “);
Serial.print(sensorVal);

// convert the ADC reading to voltage
float voltage = (sensorVal / 1024.0) * 5.0;

// Send the voltage level out the Serial port
Serial.print(“, Volts: “);
Serial.print(voltage);

// convert the voltage to temperature in degrees C
// the sensor changes 10 mV per degree
// the datasheet says there’s a 500 mV offset
// ((volatge – 500mV) times 100)
Serial.print(“, degrees C: “);
float temperature = (voltage – .5) * 100;
Serial.println(temperature);

// if the current temperature is lower than the baseline
// turn off all LEDs
if (temperature < baselineTemp + 2) { digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
} // if the temperature rises 2-4 degrees, turn an LED on
else if (temperature >= baselineTemp + 2 && temperature < baselineTemp + 4) { digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
} // if the temperature rises 4-6 degrees, turn a second LED on
else if (temperature >= baselineTemp + 4 && temperature < baselineTemp + 6) { digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, LOW);
} // if the temperature rises more than 6 degrees, turn all LEDs on
else if (temperature >= baselineTemp + 6) {
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
}
delay(1);
}