Path: utzoo!attcan!uunet!kitty!larry
From: larry@kitty.UUCP (Larry Lippman)
Newsgroups: sci.electronics
Subject: Re: Need analog opto-isolator or equiv.
Summary: Isolation amplifiers...
Message-ID: <4054@kitty.UUCP>
Date: 25 Sep 90 03:15:10 GMT
References: <222@nachos.SSESCO.com>
Organization: Recognition Research Corp., Clarence, NY
Lines: 20

In article <222@nachos.SSESCO.com>, elmquist@nachos.SSESCO.com (Chris Elmquist) writes:
> Does anyone have a nifty circuit that will replicate a 0v to 5v DC
> signal across an opto-isolated path..??  I need to read a meter
> in a hostile environment with an A/D in a PC.  I don't want the
> PC to get near this meter... this meter will be read, maybe, 10 or
> 15 times a second so frequency response is not critical...
> ... 
> Any ideas would be appreciated.

	Use an "isolation amplifier" specifically designed for this
purpose, such as one manufactured by Analog Devices, Burr-Brown, etc.
You can probably obtain an encapsulated device providing 1,000 volt
isolation for as little as $ 25.00 in small quanitites.

	My advice is to not even think of designing your own analog
isolation circuit for a one-of-a-kind application.

Larry Lippman @ Recognition Research Corp.  "Have you hugged your cat today?"
VOICE: 716/688-1231   {boulder, rutgers, watmath}!ub!kitty!larry
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