Newsgroups: comp.robotics
Path: brunix!uunet!stanford.edu!ames!news.dfrf.nasa.gov!gilligan.dfrf.nasa.gov!disbrow
From: disbrow@gilligan.dfrf.nasa.gov (Jim Disbrow)
Subject: 24 volt battery charger 
Message-ID: <1992Jun12.153727.22834@news.dfrf.nasa.gov>
Keywords: battery chargers
Sender: news@news.dfrf.nasa.gov (Usenet news)
Reply-To: disbrow@skipper.dfrf.nasa.gov
Organization: NASA Ames-Dryden FRF, Edwards, CA
Date: Fri, 12 Jun 1992 15:37:27 GMT
Lines: 24

Does any one know of a 24-Volt Battery Charger?
I am building a robot mobile platform and have just found
an old power wheel chair with the motors in fine shape.
Trouble is, it's a 24-Volt system.  Since I have to use
2 12 volt car batteries in series to achieve 24 volts, how can I
charge them without changing the wiring of the batteries to
parallel where I could use a 12 volt auto battery charger.
Besides the 24 volts for the drive motors, I also need 12 and 5 volts
for the electronics.  I'd like to build my own on-board charger/power
supply if I can figure it out.
Any ideas or schematics would be greatly appreciated.

Thanx for the help,
Jim Disbrow

work: 805/258-3417
home: 805/948-1363

internet:  disbrow@skipper.dfrf.nasa.gov

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