Ya: backlit keyboard - Rii Mini case study

Jon Phillips jon at rejon.org
Tue Jul 13 17:11:45 EDT 2010


Well, we are focused on making copyleft hardware. The problem with
wifi is that its a patent and proprietary set of landmines.

Thus, one way to compromise would be to have this slot. Well, there
already is this port.

And, with hardware, the more you make the cheaper it gets.
Unfortunately, the demand for these little SD cards are low, so the
prices are high...if there were a large 3rd-party who bought a few
thousand of these, and ideally a few thousand nanonotes, the price
would go down :)

Jon

On Tue, Jul 13, 2010 at 1:56 PM, James "Xakh" Lynch
<superstuff7 at gmail.com> wrote:
> I like the sound of that. People won't like not having wi-fi in their
> devices. Is there really no interrnal wifi card cheaper than that
> ridiculously expensive MicroSD one compatible with the NN?
>
> On Tue, Jul 13, 2010 at 1:45 PM, Jon Phillips <jon at rejon.org> wrote:
>>
>> :)
>>
>> One thing we have talked about is adding an internal sd card slot so
>> if one bought a large order, they could have the sd-wifi card in bulk
>> to have wifi capability. That could be a good compromise, to not taint
>> the devices freedom, or rather embodiment of freedom.
>>
>> Jon
>>
>> On Tue, Jul 13, 2010 at 10:25 AM, Ron K. Jeffries <rjeffries at gmail.com>
>> wrote:
>> > Very interesting set of references, thanks.
>> >
>> > Let's assume a future Nanonote includes
>> > an ISM radio such as HopeRF or others.
>> >
>> > One can do MANY of clever things with that,
>> > but using the Internet at a public hot spot isn't one of them.
>> >
>> > So...
>> >
>> > Copyleft and open? Yes!
>> > Able to use the internet without being tethered? NO.
>> >
>> > Ben Nanonote sans direct Ethernet is a cool
>> > device that almost 1000 people have purchased
>> >
>> > What I don't understand is how/why purity
>> > of the copyleft philosophy trumps having a highly
>> > desirable capability -- untethered internet access
>> >
>> > please don't shoot the messenger. just sayin' ;)
>> > ---
>> > Ron K. Jeffries
>> > http://ronkjeffries.posterous.com
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > On Tue, Jul 13, 2010 at 09:39, Werner Almesberger <werner at openmoko.org>
>> > wrote:
>> >> Wolfgang Spraul wrote:
>> >>> good to see how others solved the backlight problem.
>> >>
>> >> I was afraid that there would be just a few LEDs but a lot of
>> >> "fancy plastic" to distribute the light. It's nice that what
>> >> seems to be a much more pedestrian approach works so well.
>> >>
>> >>> Does this have anything to do with 'USB'? First time I hear about
>> >>> WirelessUSB.
>> >>> Wikipedia says WirelessUSB operates at 3.1 to 10.6 GHz, but the
>> >>> Cypress chip
>> >>> talks about 2.4 GHz?
>> >>> http://en.wikipedia.org/wiki/Wirelessusb
>> >>
>> >> The difference may be in the space between "Wireless" and "USB".
>> >> Without it, it's Cypress' 2.4 GHz stuff, about which they proudly
>> >> proclaim:
>> >>
>> >> | WirelessUSB and enCoRe are trademarks of Cypress Semiconductor.
>> >>
>> >> The Wiki page says that USB-IF prefers people to call theirs
>> >> somewhat pompously "Certified Wireless USB". I guess now we know
>> >> why :-)
>> >>
>> >> A good comparison:
>> >> http://www.ac.tut.fi/aci/courses/ACI-31070/pdf/UWB WUSB WirelessUSB.pdf
>> >>
>> >>> Maybe to look at RF in Ya, we should first identify some interesting,
>> >>> free
>> >>> software / GPL licensed stacks? Then find a matching module/RF IC for
>> >>> it?
>> >>
>> >> I'm still not sure what would be the best strategy. I've tried a
>> >> search for standards (see below) but I'm not entirely happy with
>> >> the results. I've now started to look at what the major chip
>> >> makers have to offer.
>> >>
>> >>> Are you aware of any good and stable RF protocol stacks implemented in
>> >>> free software?
>> >>
>> >> Nothing interesting beyond things that have already been mentioned.
>> >> I would in fact go one step back and look for Open standards, not
>> >> necessarily implementations.
>> >>
>> >> Here's a very rough compilation of things I found so far for the
>> >> ISM bands that aren't flat out "vendor standards":
>> >>
>> >>                Band    Rb      Range Modulation Openness/Patents
>> >> Ref.
>> >>                434 915 kbps    m                Standard       Use
>> >>                | 868 2.4       (nom)
>> >>                | | | |
>> >> Bluetooth
>> >>  Wibree        - - - x    1000  10   ?          "open"         ?
>> >> [8]
>> >> IEEE 802.15.4   - x x x  20-250   ?   many       open [11]      ?
>> >> [11]
>> >>  6LoWPAN       n/a      n/a    n/a   n/a        open [10]      open?
>> >> [9]
>> >>  MiWi          - - - x    -250   ?   ?          unpublished    ?
>> >> [13]
>> >>  WirelessHART  - - - x    ?      ?   QPSK       for-pay
>> >>  roylty-free [14]
>> >>  ZigBee        - - - x 250-500  75   QPSK
>> >>  [1]
>> >> INSTEON         - - x -    ?     50   FSK        for-pay?       ?
>> >> [12]
>> >> ISO/IEC 18000-7                                  for-pay?       RAND
>> >>  [2]
>> >>  DASH7         x - - -  28-100 250   FSK,GFSK   =              =
>> >> [1]
>> >> ONE-NET         ? x x ?    ?     ?    FSK        ?
>> >>  roylty-free [7]
>> >> Wavenis         x x x -   5-100 100+  ?          ?              ?
>> >> [4]
>> >> UWB
>> >>  Wireless USB  > 3 GHz  53-480  10   MD-OFDM    open [6]       ?
>> >> [5]
>> >> Z-Wave          - x x -  10- 40  30   GFSK       NDA            ?
>> >> [3]
>> >>
>> >> [1] http://www.dash7.org/DASH7%20WP%20ed1.pdf
>> >> [2]
>> >> http://www.dash7.org/index.php?option=com_content&view=article&id=13&Itemid=15
>> >>    http://www.savi.com/partners/licensees/index.php
>> >>    http://www.savi.com/partners/licensees/iso-18000-7.php
>> >> [3] http://en.wikipedia.org/wiki/Z-wave
>> >> [4] http://en.wikipedia.org/wiki/Wavenis
>> >> [5] http://en.wikipedia.org/wiki/Wireless_USB
>> >> [6] http://www.usb.org/developers/wusb/wusb_2007_0214.zip
>> >> [7] http://en.wikipedia.org/wiki/ONE-NET
>> >>    http://one-net.info/
>> >>    (Site requires registration and moderator approval to even read any
>> >>    technical information.)
>> >>
>> >>  http://www.one-net.info/index.php?option=com_content&view=category&layout=blog&id=2&Itemid=3
>> >> [8] http://en.wikipedia.org/wiki/Wibree
>> >> [9] http://en.wikipedia.org/wiki/6LoWPAN
>> >> [10] http://tools.ietf.org/html/rfc4944
>> >> [11] http://en.wikipedia.org/wiki/IEEE_802.15.4
>> >>     (links to IEEE standard documents, with click-through license)
>> >>     note: 802.15.4-2006 specifies ASK for 868/915 but requires devices
>> >> to also
>> >>     implement QPSK.
>> >> [12] http://en.wikipedia.org/wiki/INSTEON
>> >> [13] http://en.wikipedia.org/wiki/MiWi
>> >>     http://ww1.microchip.com/downloads/en/AppNotes/MiWi Application
>> >> Note_AN1066.pdf
>> >>     Implementation tied to use of Microchip products. No indication
>> >> about IP
>> >>     in protocol.
>> >> [14] http://en.wikipedia.org/wiki/WirelessHART
>> >>     http://www.hartcomm.org/hcf/documents/documents_specifications.html
>> >>
>> >> - Werner
>> >>
>> >> _______________________________________________
>> >> Qi Developer Mailing List
>> >> Mail to list (members only): developer at lists.qi-hardware.com
>> >> Subscribe or Unsubscribe:
>> >> http://en.qi-hardware.com/mailman/listinfo/developer
>> >>
>> >
>> > _______________________________________________
>> > Qi Developer Mailing List
>> > Mail to list (members only): developer at lists.qi-hardware.com
>> > Subscribe or Unsubscribe:
>> > http://en.qi-hardware.com/mailman/listinfo/developer
>> >
>>
>>
>>
>> --
>> Jon Phillips
>> http://rejon.org/
>> http://fabricatorz.com/
>> http://status.net/
>> http://rejon.status.net + skype: kidproto
>> +1.415.830.3884 (sf/global)
>> +86.187.1003.9974 (china)
>>
>> _______________________________________________
>> Qi Developer Mailing List
>> Mail to list (members only): developer at lists.qi-hardware.com
>> Subscribe or Unsubscribe:
>> http://en.qi-hardware.com/mailman/listinfo/developer
>
> _______________________________________________
> Qi Developer Mailing List
> Mail to list (members only): developer at lists.qi-hardware.com
> Subscribe or Unsubscribe:
> http://en.qi-hardware.com/mailman/listinfo/developer
>



-- 
Jon Phillips
http://rejon.org/
http://fabricatorz.com/
http://status.net/
http://rejon.status.net + skype: kidproto
+1.415.830.3884 (sf/global)
+86.187.1003.9974 (china)




More information about the discussion mailing list


interactive