User:Blutsauger
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I have bridged the output power supply of the USB slots in the USB hub back to the 'input' line (where the FR plugs in). With a manual switch I can turn on/off this power feed. | I have bridged the output power supply of the USB slots in the USB hub back to the 'input' line (where the FR plugs in). With a manual switch I can turn on/off this power feed. | ||
− | This might be some good | + | This might be some good luck that the good piece didn't blow off - it's a 20EUR DLINK hub. |
The power supply are 5 AA NiMH accus, which deliver around 6.5V when fully charged. This is about the same voltage the comes from the external AC/DC power plug. | The power supply are 5 AA NiMH accus, which deliver around 6.5V when fully charged. This is about the same voltage the comes from the external AC/DC power plug. | ||
{| | {| | ||
− | | [[Image: | + | | [[Image:SolderedHub1.jpg|400px]] |
− | | [[Image: | + | | [[Image:SolderedHub2.jpg|400px]] |
|} | |} | ||
+ | |||
+ | Note the single blue wire on the bottom right of the right image. This is all it needs. The rest is just fun like an additional switch with a LED to turn power-feed on and off and another Type-A USB slot, so that I don't need the genderchanger and the Type A/B converter any longer as one can see it in the topmost image. | ||
Revision as of 08:35, 6 July 2009
This is my latest artwork:
Mobile work-place ;) Freerunner beeing charged from a modified USB hub using 5 AA batteries.
Full keyboard, mouse and external HDD connected!
Internet access wia UMTS dongle.
A special holder places the FR into a reflection-free angle.
Note the TUX penguin, that I have manually glued on the 'Windows-Keys'!
I have bridged the output power supply of the USB slots in the USB hub back to the 'input' line (where the FR plugs in). With a manual switch I can turn on/off this power feed. This might be some good luck that the good piece didn't blow off - it's a 20EUR DLINK hub.
The power supply are 5 AA NiMH accus, which deliver around 6.5V when fully charged. This is about the same voltage the comes from the external AC/DC power plug.
Note the single blue wire on the bottom right of the right image. This is all it needs. The rest is just fun like an additional switch with a LED to turn power-feed on and off and another Type-A USB slot, so that I don't need the genderchanger and the Type A/B converter any longer as one can see it in the topmost image.
Using alternate browsers
Midori is nice...but not a fully usable browser. And loading pages over cellphone network is pretty slow. Therefore I use a ssh tunnel to a X-server at home and look at it via vnc. (I don't explain how to set-up an ssh account through dyndns here...)
at home type:
vncserver :30 -depth 24 -geometry 1280x1024 DISPLAY=:30 firefox &
on the FR in a first shell:
ssh -L5930:localhost:5930 myaddress.dyndns.org
and in a second shell:
vncviewer localhost:30
Adding swap space on mmc card
In SwapSpace is descriped how you add a swap file on filesystem. This seems somehow complicated to me. I wanted to use my microSD card for swapping (it doesn't matter if it gets broken after 2 million read/write accesses). Also, I don't want the mmc card formatted with VFAT anyway, so I made a new partitioning:
/dev/mmcblk0p1 1 5129 500075 82 Linux swap / Solaris /dev/mmcblk0p2 5130 81820 7477372+ 83 Linux
and added in /etc/fstab:
/dev/mmcblk0p1 swap swap defaults 0 0
doing a
mkswap /dev/mmcblk0p1
once and a reboot and we're done.
See what 'top' says: the internal 128MB memory is almost always completely exhausted, with just one or two applications running. With 512MB swap space I can use Midori, tangoGPS, several terminals, the settings pages and so on all at the same time.
Mem: 120856k total, 116364k used, 4492k free, 172k buffers Swap: 500064k total, 67696k used, 432368k free, 71764k cached
Contact me
openmoko
at
edv-buero-lehner.de