Subject:
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RE: LM35 Again
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 11 Oct 1999 01:10:29 GMT
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Original-From:
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Jose Luis <hal9000@cvtci.com.ar!nospam!>
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Viewed:
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962 times
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Hi,
Like an update to my prior email, I have tested the LM35 with an
external power source, with the same bad result.
Any help will be welcome.
Thank You
José Luis
----- Original Message -----
From: Jose Luis <hal9000@cvtci.com.ar>
To: <handyboard@media.mit.edu>
Sent: Tuesday, October 05, 1999 11:08 PM
Subject: LM35 Again
> Hi,
>
> I have been trying again to connect the LM35 temp. sensor (10mV/C) to
> one of the general-purpose Analog inputs (No pull-up), and I have no
> success, the result was the following:
>
> the analog( ) was 121, the equivalent aprox. to 250 C, obviously • incorrect.
> the output voltage of the LM35 measured connected to the HB was 2,32 V. ,
> which is consistent with the reading I get from analog( ). But if I
> disconnect the output from the HB, and read the voltage it is 0,2 V. ,
> equivalent to 20 C, which is correct.
>
> So I have no idea why this happen, I have used a Hall effect sensor
> (UGN3503, which has also analog output) and no problem, the HB reads it
> perfectly and without any adapter.
>
> Well, I hope that someone have some idea to share.
>
> Thank You.
>
> José Luis
>
>
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Message is in Reply To:
 | | LM35 Again
|
| Hi, I have been trying again to connect the LM35 temp. sensor (10mV/C) to one of the general-purpose Analog inputs (No pull-up), and I have no success, the result was the following: the analog( ) was 121, the equivalent aprox. to 250 C, obviously (...) (25 years ago, 6-Oct-99, to lugnet.robotics.handyboard)
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