Extended battery pack

Angus Ainslie angus.ainslie at gmail.com
Tue Sep 23 19:32:07 CEST 2008


On Tue, Sep 23, 2008 at 9:53 AM, -stacy <slm3095om at millions.ca> wrote:

> Matthias Apitz wrote:
> > El día Tuesday, September 16, 2008 a las 05:22:14PM -0700, nicklogan
> escribió:
> >
> >> Apparently it's been used successfully with a Freerunner and even has
> >> software written to boost the charge rate and create a desktop icon:
> >>
> >> http://www.millions.ca/~stacy/mintyboost/<http://www.millions.ca/%7Estacy/mintyboost/>
> >
> > Does somebody know how to force the Freerunner to charge with 500mA even
> > if it can't negotiate this via USB with the 'charger'?
>
> My shell script consists of three lines (two of them are output for
> diagnostics)
>
> =================
> cat /sys/class/i2c-adapter/i2c-0/0-0073/usb_curlim
> echo 500 > /sys/class/i2c-adapter/i2c-0/0-0073/force_usb_limit_dangerous
> cat /sys/class/i2c-adapter/i2c-0/0-0073/usb_curlim
> =================
>
> If you are plugged into a Minty boost or other non-intelligent charger
> (like my car adaptor charger) the output from the script should be
>
> =================
> 100
> 500
> =================
>
> The wiki page that documents this and other "black magic" is
> http://wiki.openmoko.org/wiki/GTA02_sysfs
>
>
Why not just add the 47k resistor to the minty boost and then the Freerunner
will choose 1A fast charge ?

http://wiki.openmoko.org/wiki/Neo_FreeRunner_GTA02_Hardware#Power_Design_Requirements

Angus
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