LM35 temperature sensor with 3.3v Arduino Fio

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LM35 temperature sensor with 3.3v Arduino Fio

Postby leexin89 » Tue Mar 24, 2015 2:06 pm

Hi there,

I'm building a project using Arduino Fio that runs on 3.3v, but from what I understand LM35 sensors need 4v or more to operate (no problems for those 5v Arduino boards).

So back to the question, can I use the LM35 sensor with Arduino Fio? Is it safe, and if it is, can it produce accurate temp readings?

Cheers.
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Re: LM35 temperature sensor with 3.3v Arduino Fio

Postby ober » Tue Mar 24, 2015 3:02 pm

Yup, you are right, minimum operating voltage for LM35 is 4V according to datasheet. Yes, It might still work under 3.3V, but accuracy will be affected.
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Re: LM35 temperature sensor with 3.3v Arduino Fio

Postby leexin89 » Fri Mar 27, 2015 3:25 pm

Thanks for the reply.

I have another question.. is LM35 sensor suitable for outdoor usage? I don’t think it will give an accurate environmental temperature reading if housed within a waterproof case right? If so, what other temperature sensor modules would you recommend to go with a 3.3v Arduino Fio?
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Re: LM35 temperature sensor with 3.3v Arduino Fio

Postby sich » Mon Mar 30, 2015 10:05 am

You can have a look at this waterproof version.
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Re: LM35 temperature sensor with 3.3v Arduino Fio

Postby leexin89 » Thu Apr 02, 2015 5:03 pm

sich WROTE:You can have a look at this waterproof version.


Hmm I'm having a hard time understanding how to get data from the waterproof temperature sensor.. Do you have any sample code in Arduino?

Thanks.
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Re: LM35 temperature sensor with 3.3v Arduino Fio

Postby ober » Fri Apr 03, 2015 8:45 am

Yup, if you check the product page of DS18B20, there are tutorial links and one of it is Arduino Example
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