Take a look at this

http://www.xemics.com/internet/products/products.jsp?productID=35

Could be a bit of an overkill for your app, not sure.


Regards,
Andy

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Shawn Wilton
Sent: 07 May 2004 23:40
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE:] VERY short range transmitters


Spehro, found pretty much just what I was looking for (I think, still
reading):  http://ww1.microchip.com/downloads/en/AppNotes/00232a.pdf

Thx.



Spehro Pefhany wrote:

> At 03:13 PM 5/7/2004 -0700, you wrote:
>
>> Anyone know offhand of a site, detailing extreme short range
>> transmitters.  I'm talking at most 5 feet, ideally possible to a foot

>> or so.
>>
>> -Shawn
>
>
> For such short range you may be able to use electromagnetic
> transmission, which could result in less (fewer?) regulatory hassles.
>
> Microchip has an application note on it IIRC, and it was covered in a
> session at the 2002 Masters.
>
> Best regards,
>
> Spehro Pefhany --"it's the network..."            "The Journey is the
> reward"
> speff@interlog.com             Info for manufacturers:
> http://www.trexon.com
> Embedded software/hardware/analog  Info for designers:
> http://www.speff.com
>
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