LM35DZ/NOPB Texas Instruments Board Mount Temperature Sensors PREC CENTIGRADE TEMP SENSOR datasheet, inventory, & pricing. LM35DZ Datasheet, LM35DZ National Semiconductor Precision Celcius Temperature Sensor Datasheet, buy LM35DZ. q Low self heating (°C typical) q Output impedance Ω at 1mA q Standard T package. Pin connections. Package details. Data Sheet.

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LM35 Temperature Sensor

You don’t want to be doing unncessary division at run-time. If you get the same 4. So, right there, there seems to be a problem with your setup. Datasehet I’m confused what is going on and why all of them return the same value? Post an actual schematic.

By mistake I ordered 5 pieces instead dataxheet one so I tried with all of them and they all give me same result both on Arduino and voltage measured.

Those pictures tell us nothing. Bought LM35DZ in local electronics shop and everything is working as it should.

I did exactly that my English is bad and I know it! If that’s the case, you may be able to compensate for that and calibrate them yourself, by adjusting the temperature formula in your code. AVR microcontroller pins default to input, as you have said.


Of course this application is not a time-sensitive project, but increased efficiency should always be realized where possible. Finally, I would suggest you to isolate the variables: There’s got to be something in your hardware, but I don’t know what it is. The LM35DZ datasheet output follows the formula below:. D Finally, I would suggest you to isolate the variables: Home Questions Tags Users Unanswered.

LM35 Temperature Sensor

Ricardo 4, 14 37 Sign up using Facebook. In spite of the low quality of your second picture, with a bit of hard work and datawheet some faithI can tell that your connections are correct: It’s a long shot because that may already be the default, and also because the analogRead call probably does that for you. I don’t have an answer for your question, but I’ll write down what I could tell from your setup.

Sign up using Email and Password. As a side note, this: We’re Engineers, not Scientists: In spite of the low quality of your dztasheet picture, with a bit of hard work and maybe some faithI can tell that your connections are correct:. After several attempts I tried to measure voltage with multimeter on 2nd pin Vout and it was 4.

Email Required, but never shown. Chris Thanks for the edit! I have an LM35DZ which is temperature sensor, properly connected and reading strange values Thanks on your help guys! I also second your recommendation – I remove the Arduino and measure the output as a function of varying lengths of time you heat the device with your hands.


Using this code I also got 4. That’s cheating, admittedly, but who cares as long as it works? Here’s a post of somebody with the same problem as you. Sign up or log in Sign up using Google. If you get something around mV, then the problem is related to your Arduino board.

LM35 Temperature Sensor – Datasheet & Pin Diagram

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. If so, maybe that means the batch of LM35 you got is miscalibrated. I’ll buy tomorrow one LM35DZ in local electronics shop and try again. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

There’s some information on how to do it in the related question, How to calibrate a temperature sensor. The LM35DZ datasheet output follows dahasheet formula below: