Car charger to GTA02

joerg joerg.twinklephone at
Thu Apr 3 05:30:34 CEST 2008

Am Mi  2. April 2008 schrieb Michael Shiloh:
> Marco Trevisan (Treviño) wrote:
> > Michael Shiloh ha scritto:
> >> A generic solution can be built this way:
> >>
> >> 1. Locate a generic USB car charger e.g. 
> >> Make sure it can 
> >> supply at least 1A. Note in my example that the specs don't say this, 
> >> but if you look at the picture carefully you can read the 1A on the 
> >> label. They are very common. I think I found one for less than $2.00.
> >>
> >> 2. Purchase a standard USB A to Mini B cable,e.g. 
> >> 
> >> These too are common. I have about 4 left over from digital cameras. 
> >> You can probably get them for free by asking your friends and relatives.
> >>
> >> 3. Carefully slice open the cable and solder in the appropriate 
> >> resistor between the appropriate conductors (someone needs to document 
> >> this)
> > 
> > Why not simply connecting the official Openmoko usb cable to the car usb 
> > charger?
> > Will it need the mod you've figured at the point 3?
> > 
> Good question. I've assumed the resistor is in the charger and not the 
> cable. If indeed it is in the cable your solution works. Can someone 
> confirm this?
> Also, if this is true, it means you need to label your Openmoko USB 
> cable is it is not the same as the half dozen other USB cables you have 
> in your kitchen drawer from cameras and the like.

AFAIK the cable is a simple USB host to mini-USB device "connect to PC" one 
like with any camera. Neo will be in device mode with this cable.

Charger has a fixed cable and R is inside mini-USB jack, i guess.

Charging with the special jr-Y-cable for external powered host mode, with it's 
2 pulldown R and ID-R will work. Just connect any USB charger to it. Alas 
this cable probably will not be included with Freerunner, you have to DIY.


More information about the community mailing list