Josh,
I have the USB FM radio stick.
A USB audio device does appear when it's plugged in.
However, there is no audio until the FM radio app is run.
This does SPI communication with the SI4701 to init
and change its settings.
They claim it uses standard USBaudio for the sound and that they use
A USB audio device does appear when it's plugged in.
However, there is no audio until the FM radio app is run.
This does SPI communication with the SI4701 to init
and change its settings.
Yikes that was a poor description. Let me try that again.
There is a micrcontroller onboard the USB FM
Josh wrote:
I have always thought of HID as using an external device that then
communicates to the computer, this is using a virtual app on the
computer to control an external device - I don't disagree that it is
Human Interface.
Aside from keyboards and mice, this idea is exactly what
Josh wrote:
One of the apparent weaknesses of the Si USB dongles (from my armchair
research) is the antenna connection - it might be nice to have a mini
SMA or something (with the standard FM resistance -- 75 Ohms?)
Yeah the USB FM Radio stick has a wire sticking out, that is the antenna.
The idea is that cellphone manufacturers will be able to use the
standard, open (and Linux-based) Android platform for free, to
power their future cellphones (the first ones will be out in the
second half of next year). And, as you might imagine, the new
Google-provided mobile OS will have
Shachar Shemesh
The way I figured it out, the GSM module will always be closed. This is
not due to the hardware specs being unknown, but due to the fact that
the law requires a transmitter to be approved by the FCC, and it is
impossible to get an approval for a transmitter that allows anyone
Cameron wrote
Personally.. I think people should stop commenting snip
If you don't like a comment, there is a delete key.
-- Doug
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Raphaël Jacquot wrote:
it's *very* understandable. it's called the NIH syndrome...
We are talking about spectrum allocation here.
The 900Mhz band was already allocated in North America.
You can buy 900Mhz cordless phones and wireless speakers.
915Mhz is in the ISM band (industrial, scientific,
I'm talking about the previous tech, such as iden (nextel if I'm not
mistaken) whatever qualcomm's proprietary tech was called.
Motorola invented IDEN. They have been doing telecom since
1928, so you can't really blame them for inventing stuff hehe.
In Canada, Telus Mobility also uses IDEN.
Yeah it seems like this Android is for phone companies,
or that's google's current spaghetti on the wall idea.
Even if it sticks, if they're just trying to make it some
standard for companies, what will that buy the
techie user? Nada. I'm finding it hard to motivate myself
to even look at the
Georg wrote:
no only in terms of speakerphone, also the navigational software (as far
as there'll be one) may be connected through it.. There are a lot of
possible ways to use that extension and I personally think that it's a
very useful additional feature .
Speaking of navigation, this is
Georg wrote:
no only in terms of speakerphone, also the navigational software (as far
as there'll be one) may be connected through it.. There are a lot of
possible ways to use that extension and I personally think that it's a
very useful additional feature .
The supplier where I usually
For some idea on where 850 might be used, this Fido (Canada)
USA roaming map shows 850 in a lighter color
http://www.fido.ca/portal/en/packages/unitedstates.shtml
And Fido (Canada) states this about 850
http://www.fido.ca/portal/en/support/coverage.shtml#rogers_network4
This map shows ATT
Sorry one of those links was wrong, should have been
http://skypejournal.com/blog/archives/2006/11/gsm_850_mhz_band_not_to_be_overlooked.php
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Silicon Labs SI4700 and SI4701 are entire FM tuners on a single
chip, and they are tiny. I have their USB FM Radio and I use it
every day on my PC, and I believe the same chip is in my Sony
Ericsson phone. This is the one that uses the earphone wire as
antenna, although it can be separate, as is
He is talking about receiver chips, like those used in
SonyEricsson/Nokia cellphones, to provide the phone owner with FM
radio reception. Not to transmit say, music, to a radio.
Well I mentioned both, and they are separate chips.
There is plain FM, FM with RDS/RBDS, AM/FM
and also FM
Georg,
The amazing thing about these Silicon Labs parts is that they require
almost no external components. For example the SI470x FM tuners
require a crystal and regulator, that is all, they can use headphone
cable as antenna (as is done in most phones now), and they have
stereo analog output
There is an interesting speaker phone codec made by cirrus logic
http://www.cirrus.com/en/products/pro/detail/P1006.html
They are in stock at digikey
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Alan wrote:
Adding gps to the iPhone is likely to be a minor Bluetooth driver project.
But you don't have source, so this minor project becomes impossible.
The only way that is going to happen is if/when Apple integrates such
driver support into the device.
--
More phunnies
http://www.clipstr.com/videos/ConanIPhoneCommercialItDoesEverything/
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I forgot to mention, with the modules I have looked at and
also worked with, you send a command over the serial
port to switch bands. That is all. Regarding the board
design dilemma, I suppose that means the antenna as is
probably part of the pcb board is not tuned to be quad
band. It must be
You should not have to switch firmware for the different bands.
That would be insanity. A quad band module should be able to
use one image for everything. That apparently isn't the case at
the moment, but it should be, and hopefully they are working
towards that end. Not sure what the deal is with
http://www.proficio.ca/
Not really true... Europe have GSM 900/1800...
They have two frequencies for different reasons.
1800 was added due to congestion on 900. In
North America 850Mhz is longer distance due
to higher output power. Read specs on cellular
modules (hardware) and you will see
The 850 Mhz capability of the radio is disabled.
Article quote:
If you're in a major metropolitan area, you probably won't need the
850 MHz band, but if you travel to secondary areas regularly, you
will find the extra coverage of the 850 MHz band to be valuable.
Looking into the future, it is
Edwin Lock wrote:
North America(and Canada) apparently uses 850/1800 and the rest of
the world uses 900/1900.
No, North America uses 850/1900 and most of the rest of the world uses
900/1800, but there are MANY MANY countries that use 1900 and more
than just North America uses 850. And Canada
850Mhz is odd because north america is big.
Output power 2 watt versus 1 watt for 1900 Mhz.
To cover rural areas, less towers required for 850Mhz.
There will be more not less 850 support in the future.
Europe is much more congested so can justify more
towers with less output power on phones.
I
Alright I stand corrected on one aspect of this, but 850Mhz
(specficied power) is double the output power of 1900Mhz
and is used extensively in rural areas. Any future version of
Neo will need 850/1900 for North America. And as stated
earlier, these countries also use 850Mhz:
Antigua,
Well so far it's a bunch of hot air.
Let's see what this SDK looks like.
Supposedly an early look within one week.
I'm a bit skeptical on the whole thing for now.
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The big deal about 850Mhz vs 1900Mhz is that 850Mhz specification
is higher power. Higher power means different, and probably more
stringent, testing and certification requirements. Presumably that is why
it's more than just a software/firmware issue requiring board design
and component changes.
Google the search engine company announces vapourware
and that means FIC's time is come and gone? That doesn't
make much sense. Did you see what the partners are
saying? They say we are happy to be a part of this.
This is the equivant of for example HP saying we are
announcing that we will be
Mathew Davis:
Who uses the 900 band does anyone know?
Nobody in North America uses 900 or 1800.
Originally all GSM phones were 900Mhz. The GSM specs were
created in Europe. Due to congestion on the 900Mhz band most
providers added support for 1800Mhz.
North America was late in the GSM game
Okay this is what confuses me regarding this GPS source code.
I have worked with several GPS modules. I have written code
to configure them and read and parse their output. Why you
would need the vendor's code is beyond me. They provide the
specs. The specs are all you need to write your own
Karsten wrote:
Some time ago, someone (I can not remember who it was) mentioned
that the current GPS chip of the GTA01 does some calculations in
software (means within the driver code), which is done by firmware
in other GPS chips.
Okay that makes some sense then what is being discussed, but
selected
insert to attach the image to the mms message the screen
went white. That is bad firmware of some sort.
Doug Sutherland
Proficio Research
http://www.proficio.ca/
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http
Gabriel wrote:
The Global Locate device does a lot of GPS processing on the HOST CPU
which is why it REALLY needs that driver to work.
I am guessing, possibly wrongly, that this would be stuff like altitude
and velocity calculations. When you look at every bit of a GPS spec
there isn't a lot to
Mikko wrote:
2) Yes, it can make sense not to have a bazillion CPUs on board from
various perspectives.
I evaluated no less than 25 different GPS modules some years ago
and compared them in all important aspects. Every single one had
a microcontroller onboard. I do not agree that it makes any
.
http://www.arm.com/products/physicalip/product_overview.html
If you want to make your own silicon ...grab this source hehe
http://www.opencores.org/projects.cgi/web/core_arm/overview
Doug Sutherland
Proficio Research
http://www.proficio.ca
and gerber files to produce pcb boards.
Doug Sutherland
Proficio Research
http://www.proficio.ca/
Regarding CompuLab hardware
does anyone know the word on openness of their hardware? i.e. are the
modules they supply in binary form, or as code? the hardware looks
fantastic and i've spent a while
Well WCDMA aka UMTS was made in Japan as NTT DoCoMo
launched the first commerical WCDMA 3G mobile network in 1991.
I dunno about protectionism, and there are many sides to this. The
North American wireless infrastructure is advancing slowly due to
its roots in old tech, and will probably be the
receive (+CMGR) messages in your
address book, that could be effective in blocking spam
messages, but afaik that has no impact on billing. How
it is billed depends on your carrier, and which plan or
messaging feature you have.
Doug Sutherland
Proficio Research
http://www.proficio.ca
, before getting too excited.
Doug Sutherland
Proficio Research
http://www.proficio.ca/
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No you do not have GSM there.
The 3G in Japan is UMTS.
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I have not purchased a Neo yet but I bid on one and ebay and lost.
Just wanted to say, I hope that the focus on making calls is top
on the priority list. It seems a bit bizarre that there is another
version in the works when you can't make calls on the first. It
would make more sense to get the
.
Doug Sutherland
Proficio Research
http://www.proficio.ca/
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I do tech support for phones and I assure that there are many
people who don't care about cameras. I knpw because they
say exactly that I don't need a camera. However, based on
the number of mms messaging, and problems with this I see,
they certainly are popular with a lot of people.
Lack of
Okay so I confer that GTA03 will use vi for user interface =8^)
Then we can have vi versus emacs wars too hehe
Doug Sutherland
Proficio Research
http://www.proficio.ca/
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Better check the legalities of auto sending anything to emergency
services. Due to instances of false alarms, this is not legal in many
places, and/or can involve large fines. This is true even of home
fire and security alarm systems. If you have false alarms and a
system that reports to
My hope is that this marks the end of closed phones.
Not a chance. The providers want custom firmware that
leads you to their pay per use service, pay per item content,
the recurring charge subscriptions, and the associated data
charges.
The relationship between providers and phone
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