LM35DZ Precision Centigrade Temperature Sensor ( 0-100c)

The LM35 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. The LM35 thus has an advantage over linear temperature sensors calibrated in ° Kelvin, as the user is not required to subtract a large constant voltage from its output to obtain convenient Centi-grade scaling. The LM35 does not require any external calibration or trimming to provide typical accuracies of ±1⁄4°C at room temperature and ± 3⁄4°C over a full −55 to +150°C temperature range.
Linear + 10.0 mV/°C scale factor;
Supply: 4-30V.

Relative humidity

float temp;int tempPin = 0;
void setup()
{
Serial.begin(9600);
}
void loop()
{
temp = analogRead(tempPin);
temp = temp * 0.48828125;
Serial.print("TEMPRATURE = ");
Serial.print(temp);
Serial.print("*C");
Serial.println();
delay(1000);
}

ข้อมูล  LM35

• LM35DZ Datasheet
• http://arduino-info.wikispaces.com/LM35
• http://ricardo-sequeira.com/lm35-arduino-library/
• http://playground.arduino.cc/Main/LM35HigherResolution