Subject:
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Re: LM34 temp sensor to handy board?
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 21 Jul 1997 07:39:43 GMT
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Original-From:
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Jeff Keyzer <JKEYZER@spamlessUCSD.EDU>
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Viewed:
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556 times
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I tried the circuit out tonight, and it works! (Mostly.) I hooked up a
1K and a 3K resistor for R2 and R1, for a gain of 4, and the output is
roughly linear with the input. Still need to do some more testing. I
ended up having to use a +/- 12V supply for my 741 op-amp; it couldn't work
with a single 5V supply at all. I'm going to start searching for some good
single supply op-amps with rail to rail operation (the LM660 is one, I
believe), and perhaps I'll be able to get rid of that extra op-amp power
supply.
Thanks a lot for the help!
--------------------------------
Jeff Keyzer
UCSD EE Major
jkeyzer@ucsd.edu
http://sehplib.ucsd.edu/~jkeyzer/
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Message has 1 Reply:
 | | Re: LM34 temp sensor to handy board?
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| Jeff, I would highly recommend the LM358 single or dual supply op-amp. It comes in a dual package and works great on +5v only. The LM339 is a single supply comparator. There are several manufactures: motorola, and national both have data sheets on (...) (27 years ago, 25-Jul-97, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | LM34 temp sensor to handy board?
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| I've got on my desk here a National Semiconductor LM34 temperature sensor. It outputs a voltage corresponding to 10mV/deg F. So, if it's 78 degrees F in the room, I get a voltage of .78V. I'd like to hook this device to an analog port on my handy (...) (27 years ago, 20-Jul-97, to lugnet.robotics.handyboard)
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