It doesn't really matter. Size does ;-) Especially for the antenna. I suppose the high frequency tags 13MHz or higher would be best in that aspect. I had a look at the Texas site and they seem to have a lot of useful 13Mhz stuff, but nothing for the UHF band. I only need a simple 64-bit readonly transponder and a reading distance of about 1-2 inches. After my TI visit, the antenna seem to be the factor that will determine the size (and obviously also reading distance e.t.c.) The receiver and antenna needs to be built into a small handheld device, about the of a mobile phone. The transponder stickers from TI seems relatively expensive at about USD 1.5 in quantity, where a CD inlay or similar transponder is only 1/3 of that. This is a new area for me, tips and ideas are much appreciated. /Jesper ----- Original Message ----- From: "Jim Wagner" <jim_d_wagner@applelinks.net> To: <AVR-Chat@yahoogroups.com> Sent: Wednesday, April 06, 2005 4:51 PM Subject: Re: [AVR-Chat] RFID with Thermometers > > Are you interested in the low frequency (magnetically) > coupled tags, the 1-bit "anti-theft" tags, the 13MHz > system, or the UHF (850-950MHz) tags? > > Jim > > On Wed, 6 Apr 2005 13:49:02 +0200 > "Jesper Hansen" <jesperh@telia.com> wrote: >> >> >> >> >> >> While at the RFID stuff...... >> >> I need a very small tag reader module or rather a chip >> for it so I can >> build it into my own handheld unit (size and power >> limitations). >> Also, small flexible tags, preferably like stickers. >> About 1-2" byt 2". >> >> Any hints of where to look, I've tried searching the net >> but find only >> huge tags and antennas for use with contatiners e.t.c. >> >> /Jesper >> >> ----- Original Message ----- >> From: "Jim Wagner" >> <jim_d_wagner@applelinks.net> >> To: <AVR-Chat@yahoogroups.com> >> Sent: Monday, April 04, 2005 8:49 PM >> Subject: Re: [AVR-Chat] RFID with Thermometers >> >> >> > >> > No, I have mot. This sort of thing IS planned for >> EPC Gen3 >> > or Gen4 protocol. Gen2 is just, now, starting to >> filter out >> > and that has taken well over a year. At this time, >> EPC is >> > primarily for UHF (850-950MHz) and does NOT deal >> with 13MHz >> > RFID or 125KHz RFID. >> > >> > Jim >> > >> > >> > On Mon, 4 Apr 2005 16:41:07 +0300 >> > "Arif YILMAZ" >> <arif.yilmaz@bilten.metu.edu.tr> wrote: >> >> >> >> >> >> >> >> >> >> >> >> >> >> Hi to all, >> >> Well I m nowadays interested in RFID devices and >> wonder >> >> if anyone of you >> >> experts have ever seen an RFID transponder with >> a thermal >> >> sensor? Or a >> >> thermometer function internally? >> >> >> >> Thanks for the attention and help in >> the near >> >> future :) >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> To visit your group on the web, go >> >> >> to:http://groups.yahoo.com/group/AVR-Chat/ >> >> To unsubscribe from this group, send an email >> >> >> to:AVR-Chat-unsubscribe@yahoogroups.com >> >> Your use of Yahoo! Groups is subject to the >> Yahoo! Terms >> >> of Service. >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> > >> > >> > --------------------------------------------------------------- >> > The Think Different Store >> > http://www.thinkdifferentstore.com/ >> > For All Your Mac Gear >> > >> > --------------------------------------------------------------- >> > >> > >> > >> > Yahoo! Groups Links >> > >> > >> > >> > >> > >> > >> > >> > >> >> >> >> >> >> >> >> >> >> Yahoo! Groups Links >> >> To visit your group on the web, go >> to:http://groups.yahoo.com/group/AVR-Chat/ >> To unsubscribe from this group, send an email >> to:AVR-Chat-unsubscribe@yahoogroups.com >> Your use of Yahoo! Groups is subject to the Yahoo! Terms >> of Service. >> >> >> >> >> >> >> >> >> >> >> > > --------------------------------------------------------------- > The Think Different Store > http://www.thinkdifferentstore.com/ > For All Your Mac Gear > --------------------------------------------------------------- > > > > Yahoo! Groups Links > > > > > > > >
Message
Re: [AVR-Chat] RFID with Thermometers
2005-04-06 by Jesper Hansen