The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
Subject: Re: Can a digital vom be used as a 12 volt battery monitor ?
X-Newsreader: Microsoft Outlook Express 5.50.4133.2400
Date: Tue, 08 Oct 2002 11:32:50 GMT
NNTP-Posting-Date: Tue, 08 Oct 2002 11:32:50 GMT
Organization: AT&T Worldnet
You need to have an supply that is isolated from the voltage
you are measuring. I have seen a circuit using a 555 as an
oscillator driving a transformer. The output of the transformer
is rectified and filtered. I saw this on the web and it was
designed just for this purpose. Sorry but I don't have any leads
to the schematic.
"Ray" wrote in message
> The vom uses an internal 12 volt battery as it's power. I want to power
> vom from the 12volt
> battery array. When I do this the readings are way off. The internal
> power needs to be isolated.
> Any way around this ?
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup