Re: [Gumstix-users] Beginner's Questions

[Dave H. <dhy...@gm...>]

Hi,

On Wed, Jun 17, 2009 at 12:03 AM, cruizbugs <cru...@ya...> wrote:
>
> Hi, sorry I'm a little bit off the topic here, But i'm totally new to gumstix
> and I have a project that requires me to have the gumstix (verdex pro XL6P)
> to connect and control a switch circuit.

You should create a new thread, rather than replying to an existing
one, otherwise it might not get seen by people using threaded mail
readers.

> I just need the gumstix to output a logic '1' or '0' at certain time to the
> circuit.
> I read the  PXA270 - processor manual, and I saw an IO pins there.
> But I dont understand how do I have to connect the gumstix to the circuit.
> do I need a robostix to do the job here?? Or i should just solder a wire to
> the gumstix ??

You'll need a daughtercard of some sort. The real thing to figure out
are the voltages involved. With the gumstix a 0 is 0v and a 1 is 3.3v.
These outputs are limited in the amount of current they can provide,
only a few milliamps. So you should probably tell us what type of load
you'll have. For small loads, like an LED, you can probably drive it
directly, for anything larger, you'll need a buffer chip of some kind.

--
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/