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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.

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So to get the degree value in fahrenheit, all that must be done is to take the voltage output and daatsheet it by this give out the value degrees in fahrenheit.

This is the datasheet of the LM IC: Once we have this ratio, we then multiply it by to give the millivolt value. We attach this pin to analog pin A0 of the arduino board. Pin 2 gives adtasheet output of 1 millivolt per 0.

So you circuit connections are: Once we obtain this Celsius value, we can convert into Fahrenheit with the following equation: Pin 3 is the ground pin and connects to the ground GND terminal of the arduino. The difference between an LM and LM34 and LM35 temperature sensors is the LM sensor gives out the temperature datashete degrees Kelvin, while the LM35 sensor gives out the temperature in degrees Celsius and the LM34 sensor gives out the temperature in degrees Fahrenheit.

How to Build a LM Temperature Sensor Circuit

Below is the pinout of the LM IC: We can then easily convert this value into fahrehnheit and celsius by plugging in the appropriate conversion equations. Before we can get a Kevlin reading of the temperature, the analog output voltage must first be read. Now the computer is connected to the arduino.


So, for example, if the output pin, pin 2, gives out a value of mV 0. The output pin provides an analog voltage output that is linearly proportional to the fahrenheit temperature.

LM Datasheet, PDF – Alldatasheet

In this project, we will demonstrate how to build temperature sensor circuit using a LM sensor. We will integrate this with the arduino to measure the temperature. This is ideal because the arduino’s power pin gives out 5V of power. We can use any type of arduino board. So if the LM ml355 giving an output reading of 2. All we must do is write this code and upload it to the arduino to convert this kelvin temperature into fahrenheit and celsius.

This translates into the circuit schematic: Temperature Sensor Circuit The temperature sensor circuit we will build is shown below: This is datasehet there is millvolts in 5 volts.

National Semiconductor

We can now write code in the processing software to give instructions to the arduino. 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. As a temperature sensor, the circuit will read the temperature of the surrounding environment and relay this temperature to us back in degrees Kelvin. This allows us to calibrate the dataheet sensor if we want a more precise temperature readout.

You can adjust this value to meet your personal preference or program needs. All you have to do is take the output reading and divide it by 10 in order to get the temperature output reading.


The raw voltage over this value therefore represents the ratio of how much power the output pin is outputting against this full range. It is divided by because a span of occupies 5V. The IC has just 3 pins, 2 for the power supply and one for the analog output. This will be the raw value divided by times Pin 1 is the Adjustable Pin Adj. Since the output pin can give out a maximum of 5 voltsrepresents the full possible range it can give out.

View lm355 datasheet:

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

Once this analog voltage in millivolts is calculated, we then can find the lm355 in kelvin by the equation: We get the ratio of the raw value to the full span of and then multiply it by to get the millivolt value.

Pin 2 is the output pin.

The datashete B side of the connector goes into the arduino and the type A side into the USB port dataasheet the computer.

This output reading of All 3 are calibrated different to output the millivolt voltage reading in proportional to these different units of measurement. 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. The code is shown below.