How to Calibrate a LM35 Sensor.

Thread Starter


Joined May 5, 2011
How do I work out the temperature when using a LM35 as the sensor? I have limited resources but do have a oscilloscope and a dvm.

Thanks folks


Joined Jan 6, 2004
Based on the above, just a proper reading (in fact, an average of many) allows you to correct any future ones using a proportional difference.

This was my very first project: to collect temperatures and display them on 7segment digits for a green house. The whole controlled by the venerable PIC 16C57.

To ensure the performance I implemented the recommended circuit in the datasheet and used an LM34 to provide a constant current of around 0,5 mA or less IIRC.