From: "Boris Nogoodnik"
Subject: Re: how to operate a battery-powered device from DC wall wart?
Organization: KGB, Ltd.
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Date: Fri, 13 Dec 2002 06:16:11 GMT
NNTP-Posting-Date: Fri, 13 Dec 2002 01:16:11 EST
"J81" wrote in message
> Hi. I have this little battery-powered motor system which runs
> 1.5V C-cell battery. I'm curious what the best way to
> device's current and voltage needs would be, and then how I
> about creating a simple interface to a wall wart transformer
> of the battery.
How's about just measuring the current and going from there?
Voltage you already know.
> The reason for this request is that I'm doing a lot of
> development with this thing, and I'm just eating through
> left and right. :(
You can try NiCad or NiMH - cheaper on the long run. They are
only 1.2V and lower capacity then alkaline, but perform better
in high current situations.
> Any information on C-cell batteries, battery power -> dc power
> conversions, or anything that you think is related to my
> would be greatly appreciated.
You can find specs on the batteries on almost every battery
manufacturer's web site - Duracell, Energizer, etc. They all
about the same for the same battery type. And as power supply
goes - you just have to provide the same voltage and maximum
current. Most wall transformers are 6V and up, so you will need
some kind of down step voltage regulater. Perhaps a switching