PSN-L Email List Message

Subject: Re: Gas Generator recommendations
From: "Travis Farmer" travis5765@...........
Date: Tue, 08 May 2001 22:57:26 -0400


the regulators I noted in the schematic can handle the full 12V direct from 
the battery. Besides, cutting a battery gets crap into the acid/water and 
will shorten the charge life of the battery. On a note slightly the same, 
keep the batteries warm. it helps them last longer. about 90 - 100 deg F 
should be about right (figured this out when I was in the local electric car 
team. the car was US champ due to my endless testing of the batteries for 
performance and of course the driver was a big help.)

I am currently trying to figure out a way to get duel supply (V+ and V-) 
from a single set of batteries. doing so would help in charging.

somebody mentioned taping the 12VDC output of a generator to take over and 
charge the batteries when the power fails. I'm not sure if this would work 
or not. in order to charge a battery, the charge supply must have a slightly 
higher voltage than the battery. I think most chargers are around 13 or 14 
volts. check with the manufacture of the generator for more information 
concerning this.

-Travis



>From: CapAAVSO@.......
>Reply-To: psn-l@..............
>To: psn-l@..............
>Subject: Re: Gas Generator recommendations
>Date: Tue, 8 May 2001 21:54:02 EDT
>MIME-Version: 1.0
>Received: from [216.100.224.130] by hotmail.com (3.2) with ESMTP id 
>MHotMailBCC1F5FA00994004310CD864E08210090; Tue May 08 19:27:14 2001
>Received: from imo-m08.mx.aol.com (unverified [64.12.136.163]) by 
>sys5.webtronics.com (Rockliffe SMTPRA 4.5.4) with ESMTP id 
> for ; Tue, 8 May 
>2001 18:56:15 -0700
>Received: from CapAAVSO@......... imo-m08.mx.aol.com (mail_out_v30.10.) id 
>x.9c.e2d0ad5 (3986) for ; Tue, 8 May 2001 21:54:03 
>-0400 (EDT)
>From larry_cochrane@.............. Tue May 08 19:28:41 2001
>Message-ID: <9c.e2d0ad5.2829fd3a@.......>
>X-Mailer: AOL 4.0 for Windows 95 sub 114
>Sender: psn-l-request@..............
>
>In a message dated 5/8/01 11:44:13 PM GMT Daylight Time,
>travis5765@........... writes:
>
><< Re: the direct battery powered computer: ............
>
>  A computer generally has 4 power sources. +12VDC, -12VDC, +5VDC, and 
>-5VDC.
>  all sources are needed to run the computer.
>  >>
>Hi Karl and Travis,
>
>What do you think of this idea:
>
>1) buy three 12 volt deep charge RV-marine batteries.
>
>2) Cut into the middle of the top of one battery to find the lead crossover
>terminal that connects the six 2.1 V individual cells in series (wear eye
>protection in case you accidentally short something out and make 
>fireworks).
>Test the terminal you uncovered with a voltmeter to make sure there is 6.3 
>V
>to either of the two normal terminals of the battery. If it is the right
>crossover solder a heavy copper wire to it to make it into a center tapped
>12-volt battery that is a dual +6.3 V -6.3 V power supply. Hook a 5V 
>voltage
>regulator to each 6.3 volt leg and now you have the regulated +5V and -5V
>required to run the computer The center tap should go to neutral on the
>computer.
>
>3) Connect the other two 12V batteries in series and their center to 
>neutral
>on the computer. Put a 12V regulator on each 12.6 V (when fully charged)
>battery and you have the plus 12V and minus 12V regulated power required by
>the computer.
>
>4) Connect three battery chargers, one to each 12V battery. These should be
>the type that automatically shut down so they don't overcharge the 
>batteries.
>I have one from Sears that puts out 5-Amps on the high setting.
>
>5) Hook a 12V DC/120V AC inverter to any one of the three 12V batteries to
>run your monitor and seismo. Now if the California Independent System
>Operator (ISO), shuts your power grid down your computer and seismo won't
>even know about it and you won't miss that big one. (Murphy's law almost
>guarantees this will happen;-).
>
>Of course you will need a gasoline or propane powered generator if the ISO
>turns you off for long stretches of time. If you are optimistic about
>California's electrical power problem being solved in the near future don't
>bother getting the generator :-). I live in a rural farm county in New 
>Jersey
>but our power grid gets overloaded too. Another bigger problem we have here
>is ice storms and big wind storms that blow trees down across the power 
>lines
>and leave us without power sometimes for days until the work crews get 
>things
>fixed again. I live on top of a mountain and last summer lightning zapped 
>my
>modem and also the modem in my fax machine despite the power line surge
>protectors that supposedly also protected the phone lines (read the fine
>print on these things and you will see that lighting surges are the one 
>thing
>they don't guarantee to protect you from! ). It cost me ~$150 to have new
>modems installed and if had built the independent battery system described
>above I would have saved the modems (if I had remembered to disconnect the
>phone lines). I welcome your thoughts and comments on the above.
>
>Best regards,
>Cap
>__________________________________________________________
>
>Public Seismic Network Mailing List (PSN-L)
>
>To leave this list email PSN-L-REQUEST@.............. with
>the body of the message (first line only): unsubscribe
>See http://www.seismicnet.com/maillist.html for more information.

_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com

__________________________________________________________

Public Seismic Network Mailing List (PSN-L)


[ Top ] [ Back ] [ Home Page ]

Larry Cochrane <cochrane@..............>