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RE: Advantech info? (one more question :P)

>>>>> "Joseph" == Joseph Near <> writes:

>> Simple and small solution: powertrends PT6302A.

Joseph> I looked at the website. It doesn't tell how big it is (exact
Joseph> dimensions) and...how do you hook it up? 

In addition to Doug's reply have a look at Steve Mann's site - last
time I looked (yep I learned my lession) he had very clear
instructions with pictures posted on using a power trends for DC to
DC.

I used to use a power trends and I like them a lot.  It is a solid
robust device, but lately I have been useing a datel.  The datel gets
me a little more run time.

While the instructions are not up yet, you can get parts list and post
script file for burning the circut board for the circut I have been
using at http://www.charmed.com/charmit/ It is a compleate design that
will let you swap between two dc power sources in the 7 to 15 volt
range and give you 5 volt out and battery (less the diode drop) out.

It does have fuses and diods that protect against hooking up batteries
backwards.  Personaly, I find that usefull - I have on occation, when
fumbeling around at some inoportune moment, hooked up power
backwards.  Perhaps I have because I ahve always built in somthing to
protect against that, perhaps it is just that sooner or latter
everybody makes a mistake, either way, I like haveing it built in to
the power supply.

If you *knew* you were only going to use the sony's for power you
could simply put one diode across the lines so that *if* it got wierd
backwards it would short accross and the sony's chip would turn it off.
But this would only work for the sony's.

Hope this helps,

Greg

--
 Greg Priest-Dorman
 

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