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.
From: "Fritz Schlunder"
Subject: Re: Multi-port battery charger ideas
Date: Wed, 27 Nov 2002 04:23:00 -0700
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
X-Comments: This message was posted through Newsfeeds.com
X-Comments2: IMPORTANT: Newsfeeds.com does not condone, nor support, spam or any illegal or copyrighted postings.
X-Comments3: IMPORTANT: Under NO circumstances will postings containing illegal or copyrighted material through this service be tolerated!!
X-Report: Please report illegal or inappropriate use to
X-Abuse-Info: Please be sure to forward a copy of ALL headers, INCLUDING the body (DO NOT SEND ATTACHMENTS)
Organization: Newsfeeds.com http://www.newsfeeds.com 80,000+ UNCENSORED Newsgroups.
"Roger N" wrote in message
> I'm working on what is becoming an eternal project of a multiple port
> battery charger. I have come up with some methods to do what I want but
> thought there might be a better way. I want to have 1 charge circuit and
> discharge circuit and share them among multiple batteries. Double pole
> relays would do the job but I would like to use solid state switching
> instead. Do you know of a solid state circuit that would allow me to
> different batteries in and out of the charge circuit. The problems is
> current needs to flow both directions and I need very little voltage loss
> (will discharge down to <1V). I need something like a power version of an
> analog multiplexer or a solid state relay that behaves similar to dry
> contacts. Or, perhaps you have an idea that would be or might be better?
Since it doesn't sound like you need high speed switching, build yourself a
power version of a solid state relay. Take two power N-channel MOSFETs and
tie their sources to each other. Also tie both of their gates to each
other. Then drive the common gates and sources using a photovoltaic
isolator. The two drains serve as your bidirectional in/out terminals, so
you should just place this set in series with your batteries that need to be
switched and voila.
International Rectifier makes both suitable MOSFETs and photovoltaic
isolators. Both International Rectifier MOSFETs and photovoltaic isolators
are available from Digikey.
-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 80,000 Newsgroups - 16 Different Servers! =-----
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup