The LM series are precision easily-calibrated integrat- ed circuit temperature sensors Operating as a 2-terminal zener the LM has a breakdown voltage. lm are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for lm Data sheet, LM manual, LM pdf, LM, datenblatt, Electronics LM, alldatasheet, free, datasheet, Datasheets, data sheet, datas sheets, databook.

Author: Mushura Yozshura
Country: Luxembourg
Language: English (Spanish)
Genre: Video
Published (Last): 16 September 2006
Pages: 198
PDF File Size: 16.86 Mb
ePub File Size: 5.33 Mb
ISBN: 665-3-34151-569-8
Downloads: 48750
Price: Free* [*Free Regsitration Required]
Uploader: Gugal

Since the output pin can give out a maximum of 5 voltsrepresents the full possible range it can give out. The IC has just 3 pins, 2 for the power supply and one for the analog output. Once this analog voltage in millivolts is calculated, we then can dtaasheet the temperature in kelvin by the equation: So if the LM is giving an output reading of 2.

How to Build a LM335 Temperature Sensor Circuit

This will be the raw value divided by times We will integrate this with the arduino to measure the temperature. Temperature Sensor Circuit The temperature sensor circuit we will build is shown below: Pin 3 is the ground pin and connects to the ground GND terminal of the arduino. We can then easily convert this value into fahrehnheit and celsius by plugging in the appropriate conversion equations.

You can adjust this value to meet your personal preference or program needs. So you circuit connections are: Now the computer is connected to the arduino.


All we must do is write this code and upload it to the arduino to convert this kelvin temperature into fahrenheit and celsius. This is because there is millvolts in 5 volts.

LM Datasheet pdf – Precision Temperature Sensor – National Semiconductor

The output pin provides an analog voltage output that is linearly proportional to the fahrenheit temperature. We can now write code in the processing software to give instructions to the arduino.

Before we datasheer get lm535 Kevlin reading of the temperature, the analog output voltage must first be read. All you have to do is take the output reading and divide it by 10 in order to get the temperature output reading.

The difference between an LM and LM34 and LM35 temperature sensors is the LM sensor gives out the temperature in degrees Kelvin, while the LM35 sensor gives out the temperature in degrees Celsius and the LM34 sensor gives out the temperature in degrees Fahrenheit.

The type B side of the connector goes into the arduino and the type A side into the USB port of the computer. This is so that we can hook our arduino to a computer and send it code that it can run to display to us the temperature.

Below is the pinout of the LM IC: The code is shown below. This translates into the circuit schematic: All 3 are calibrated different to output the millivolt voltage reading in proportional to these different units of measurement. This is ideal because the arduino’s power pin gives out 5V of power. This output reading of As a temperature sensor, the circuit will read the temperature of the surrounding environment and relay this temperature to us back in degrees Kelvin.


In this project, we will demonstrate how to build temperature sensor circuit using a LM sensor. We can use any type of arduino board. Pin 2 gives an output of 1 millivolt per 0.

Pin 1 is the Adjustable Pin Adj. Once we obtain this Celsius value, we can convert into Fahrenheit with the following equation: The arduino will then read this measured value from the LM and translate into degrees kelvin, fahrenheit and celsius, which we will be able to read from the computer from the arduino serial monitor.

We attach this pin to analog pin A0 of the arduino datashret. The arduino, with suitable code, can then interpret this measured analog voltage and output to us the temperature in degrees Kelvin, Celsius, and Fahrenheit.

The raw voltage over this value therefore represents the ratio of how much power the output pin is outputting against this full range. This allows us to calibrate the temperature sensor if we want a more precise temperature readout.