Jacob's Workshop: How To Use The LM335Z Temperature Sensor With An Arduino

Parts needed:
LM335Z temperature sensor
1K ohm resistor (brown, black, red)
Breadboard
Some wire

I had a little trouble finding code for this temperature sensor online, but ended up getting enough pieces together to finally get it working.

//Sketch created by Jacob Antoun
//10/20/13
//
//Wiring Info:
//Nothing is connected on the collector
//Analog Pin 3 is connected to the Base
//1K ohm resistor is connected to the Base, after the AnalogPin
//Ground is connected to the Emitter
//

#define tempSensor A0 //Puts the LM355Z temperature sensor on anolog pin 0

const float miniVoltsToKelvin = 0.004882812 * 100; //found this online, I don't remember the source :(

void setup() {
  Serial.begin(9600); //initialize the serial monitor
}

void loop() {
  float kelvin;
  float fahr;
  kelvin = analogRead(tempSensor) * miniVoltsToKelvin; //converts the reading from the arduino into kelvin
  fahr = 1.8 * (kelvin - 273) + 32; //converts the kelvin to fahrenheit
  Serial.print(fahr); //prints to the serial monitor
  Serial.print(" degrees");
  Serial.println();
  delay(1000);
}

If you want a copy of the code, and to see other projects I'm working on, look at my GitHub.
https://github.com/jacobantoun/LM335Z

Below are just two images that show the wiring of the temp sensor

Just showing the wiring of it on a breadboard

Notice how nothing is connected to the collector, and look at the placement of the analog pin and resistor.

Sunday, October 20, 2013

How To Use The LM335Z Temperature Sensor With An Arduino