I am ill today and needed to distract me some bit.

I added a LM35 temperature sensor to my Arduino. Since someone did the work already, I only needed to copy some code and setup the wiring on a breadboard. I used the same wiring like in the link. Below is an image of the wiring made with Fritzing. I am using a LM335 for this because there where no LM35 as a Fritzing part available...

Arduino LM35 Wiring

I changed some parts of the code to only print the temperature as String to serial. In the original code the data was sent as (byte) over serial to read the value with an application created using Processing. Feel free to change this again... ;) This is the code I used:

float temp;
int tempPin = 0;

void setup()

void loop()
  temp = analogRead(tempPin);
  temp = temp * 0.48828125;

My output in the serial monitor of the Arduino IDE looks like this:

Arduino LM35 output

Posted in: arduinoopensourceelectronicsdiy

Tags: arduino, embedded, device, fun, opensource, avr, circuit, diy, sensor, programming, wiring,