Look at http://www.nvlsi.no/index.cfm?obj=menu&act=displayMenu&men=2

We use their chips .. They are great. No filters, no coils. Chip is a bit
expensive, if I remeber well about $6, but it's transiever. We tried to
realize an application you were talking about with Microsoft's rf chips but
we resigned. The reciever seemed to be too complicated and expensive.

Regards

Igor

-----Original Message-----
From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On
Behalf Of Mike
Sent: Tuesday, December 16, 2003 10:47 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC:] rfPIC12F675F and rfRXD0402


On 16 Dec 2003 at 7:30, Olin Lathrop wrote:

> Mike wrote:
> > I'm sure your app was more involved that this little deal I'm doing,
> > but you've piqued my interest. What chip/line did you find that did
> > work and for what, basically?
>
> There is no nicely integrated solution I'm aware of.  You can get bare RF
> transmitter and receiver chips, then hook them up to whatever
> microcontroller you need.  Melexis is one RF chip manufacturer that
springs
> to mind, but I know there are others.

The one I've considered up to this point is a super simple data radio most
of which
are 8 pin SOICs. I've checked Melexis, Atmel, and maybe one other. Someone
suggested Linear Corp and I'll check that. Thanks Andrew!
>
> > What would be good for what is
> > basically a garage door opener without a motor driver and
> > all? I've found a few (mostly major overkill) but who knows what I
> > missed.
>
> Note I said the rfPIC is *nearly* useless, not totally useless.  It
probably
> is suitable for very simple applications like a no-frills garage door
> opener.  It just hasn't fit the requirements I've had so far.

I understand.
>
> So far I've been dissappointed in the lack of integration and wimpy
> processor.  I sortof remember there is an RF band limitation too, but I
> don't remember for sure.  It's been a while since I last looked at the
> rfPIC.

They cover a range that deals with unlicensed 350-450 MHz and that 8xx - 9xx
band.
The rfPICs handle a higher data rate than my chip, but I don't need that,
either. Yet.

>
> > And if Olin doesn't want your job, let me know. Make sure you mention
> > his name.
>
> Huh?  I really have no idea what this is in reference to.

That was kind of a joke. If the customer didn't want to pay a pile of
greenbacks and
you couldn't help him/her. I have a few designs that can be modified and
won't
require a bunch of development time.

The reason I want them to mention your name is to give me the heads up that
you
didn't want the job. It might be so fubar'd that I wouldn't take it either.
I'm currently
working a prospect that didn't mention how his black box would be powered.
We
settled on "battery" -- no mention of what kind of battery -- and a hampster
(one of
my suggestions) for backup. But he wan't to feed the hampster Red Bull so I
suggested a 'possum. Pulling information out of him has been tedious.
>
> Things have picked up dramatically since early October, but we aren't
> turning away jobs yet (unless we feel we can't be effective given the
> circumstances, but that has nothing to do with the economy).
>
> This recession has been strange.  It was like we hit a brick wall in June
> 2002.  Things stayed nearly dead until it picked up again just as suddenly
> in October 2003.  We suddenly had the problem of not being able to find
the
> right people fast enough, and having to get PCs, desks, chairs, upgrade
our
> LAN, etc.  We're still looking for a good EE.

I'll give you a call. I saw the post. I had other plans, but maybe we can
figure
something out.

Mike
>
>
> *****************************************************************
> Embed Inc, embedded system specialists in Littleton Massachusetts
> (978) 742-9014, http://www.embedinc.com
>
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