[Soekris] Lightweight UPS

[Bob Camp]

Hi

The junk where you are may not be the junk where I am ...

Around here the kids seem to get electric powered cars and trucks  
when they are about three or four years old. In a lot of cases the  
toy is interesting for about three days. They are a fine source of  
batteries and chargers.

I would ultimately aim for a full DC setup. Say an 18 volt 2A supply,  
a couple of diodes, a simple charge circuit and a 12V 10 to 20 amp  
hour battery. For a small setup like that  any missing parts should  
be pretty easy to come by.

Finding a good charger in something widely available will not be real  
easy. I have no idea why these guys all skimp on the charger.  
Fortunately there are several good (and cheap) IC's that will do the  
job with pretty simple stuff around them.

Bob

On Jul 4, 2007, at 7:14 AM, Bill Maas wrote:

>
> Hi,
>
> here's a question that's been in my mind for a while now: is there  
> some
> widely available toy or other mass-produced item that happens to  
> have an
> excellent loader and batteries which can easily be ripped out and  
> could
> serve as a lightweight UPS for my 2 Soekris boxes? Must be able to  
> feed
> while loading of course. All available UPS systems seem to be in  
> the kW
> range. One of the reasons why I run these Soekris boxes is their  
> 3-10 W
> power consumption, so kW's are way out of range, as are the prices of
> these things. [Links to] loader/feeder circuit diagrams also welcome.
>
>
> Bill
>
> -- 
> "Fix bugs first, add features later"
>
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