Re: [Gumstix-users] power question

[Jay P. <ja...@bl...>]

Greg,
	Many thanks for the info.  Are you removing your AAA's or charging them in 
place?

Thanks,
-Jay

On Tuesday 05 September 2006 21:56, G Elliott wrote:
> if you have to have lipo, you could purchase a 5v boost converter
> (Maxim MAX1765) and wire that up.
> gives you ~5v output as the battery drops from ~6v to ~3v with
> minimal loss of efficiency.
>
> i thought about doing that, but ended up doing NiMH AAA's.
>
> sparkfun may also start carrying buck/boost converters in the future
> for lipo batteries, so i'm told.
>
> greg
>
> On Sep 5, 2006, at 5:26 PM, Jay Petersen wrote:
> > Okay, so I was wondering if anyone could shed some light on a power
> > issue I am
> > having.  I have a gumstix + breakout-gs + netCF combination.  The
> > CF Card is
> > going to be used for flash storage, and I have a ttl based LCD to
> > hook up too
> > for feedback from the app.
> >
> > Basically I was originally hoping to use the lipo charger + a
> > 2000mah lipo
> > battery from sparkfun.  They run at 3.7v and I (all though I
> > haven't tested
> > it) read some emails talking about it, and saw the wiki entry on
> > the lipo
> > options.  I figured it would be fine for the gumstix.
> >
> > The problem is that the charge just isn't enough to show the lcd.
> > It appears
> > to work etc, but the lcd is VERY faint.  The lcd requests 5v of power.
> >
> > So my question is, does anyone have any recommendations on a
> > battery solution
> > which would be built in like the sparkfun lipo charger?  I would
> > like to
> > avoid removable AA/AAA if at all possible.
> >
> > I had a spare 7.4v lipo battery from a RC helicopter and cut up one
> > of my
> > speed controls (drops the current to 4.9v) and it seems to power it
> > fine, but
> > I am unsure about how I would go about charging it without removing
> > the
> > battery etc.
> >
> > Thanks in advance,
> > -Jay
> >
> > ----------------------------------------------------------------------
> > ---
> > Using Tomcat but need to do more? Need to support web services,
> > security?
> > Get stuff done quickly with pre-integrated technology to make your
> > job easier
> > Download IBM WebSphere Application Server v.1.0.1 based on Apache
> > Geronimo
> > http://sel.as-us.falkag.net/sel?
> > cmd=lnk&kid=120709&bid=263057&dat=121642
> > _______________________________________________
> > gumstix-users mailing list
> > gum...@li...
> > https://lists.sourceforge.net/lists/listinfo/gumstix-users
>
> -------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job
> easier Download IBM WebSphere Application Server v.1.0.1 based on Apache
> Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> gumstix-users mailing list
> gum...@li...
> https://lists.sourceforge.net/lists/listinfo/gumstix-users