Thanks. Part of the article, if I had published it in its entirity,
explains that you can adjust the output side by playing with the
resistor. I was getting 13.4 v. when I ruined my board. I'll try for
higher output next time.

PC power supplies are free to me (and many others too, all you have to
do is ask around), and the resistor I used was about $1.00. The whole
thing takes about 30 minutes the first time you do it, less thereafter.

Jim

On Saturday, December 6, 2003, at 01:45 PM, Anonymous Digest wrote:

> , no way
> X-Mailer: MR/2 Internet Cruiser Edition for Windows v2.35w/35
> (Unregistered)
>
>
>> Subject: Re: Making a 12v battery charger from a peecee power supply
>
> Seems like a good idea, but it won't work. You cannot charge a lead
> acid
> battery with only 12V. For obvious reasons, the PC 12V PS is pretty
> well
> regulated to 12V.
>
> Without going to war with folks over exact tenths of volts, and other
> minute details, if your lead acid battery is at 12V, its only about 75%
> charged. Lead acid requires a voltage of around 2.4V/cell, or 14.5V
> total,
> to get any where near a decent charge on the battery.
>
>
> John
>