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RFID


Sci.Electronics.Design is a worldwide Usenet news group that is used to discuss various aspects of Electronic Circuit Design.

We found 35 threads matching "rfid"

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The most relevant threads are listed first

rfid system guidelines?

poster - 2008-09-10 08:06:00
For example -there is a 30*30 meter warehouse with a lot of metallic products- to ensure fast and reliable reading does one go for a dense reader deployment with reader controllers, or metalic rfid tags in normal reader configuration could do the job. How about a wi-fi system or a case when you ...rfid system guidelines?

Ping: Joerg

Jan Panteltje - 2008-06-25 09:14:00
Joerg, maybe this will interest you: RFID tags stop medical equipment: http://www.heise.de/newsticker/Studie-RFID-Systeme-beeinflussen-Medizintechnik--/meldung/109971/from/atom10 List: http://www.amc.nl/?pid=5266 ...Ping: Joerg

Need to know how to design the RFID antenna.

2008-09-25 17:32:00
Hi, I want to learn how to design RFID antenna. Do any one could help me out with this. Thanks. Chinthu ...Need to know how to design the RFID antenna.

RFID tags in Arctic conditions?

Fatfreek - 2007-12-31 15:03:00
I have an application in which RFID tags need to respond and send data while at very cold (10 deg F to -30 deg F) temperatures. They will have been put in place for up to one year. While not exactly the application, it's as if I were attaching RFID tags to the entrances of Arctic Fox dens - a ve...RFID tags in Arctic conditions?

Re: universal remote control standards

default - 2008-03-07 12:53:00
On Thu, 6 Mar 2008 18:26:42 +0100 (CET), sky465nm@trline5.org wrote: > > > Do the mankind a a favour and build a cheap TV-B-Gone-s :) > > > Ditto that last sentiment. Great fun in Walmart. > > I realy HATE these babbling TVs with flashcards that babbles about worthless > products. That ...Re: universal remote control standards

RFIDs close to HV power lines

Efthimios - 2008-09-13 18:58:00
Does any of you know if passive RFID will work close (3-4 meters) to high voltage power lines (275kVolt). I think yes since they work in FR frequencies and power lines have 60-50 Hz despite the strong electromagnetic fields. Do you agree??? ...RFIDs close to HV power lines

Book recommendation?

2009-04-08 13:14:00
Hi all, Can anyone recommend a good book about how to connect different chips from different manufacturers into a single device? E.g., an RFID reader from TI, a microprocessor from Intel, and a wireless transceiver from somebody else. I don't even know what to look for... I've searched f...Book recommendation?

Good custom coil supplier?

Scott Newell - 2009-05-18 19:14:00
Does anyone know of a good custom coil supplier in the US? I need some small (40mm OD) air core coils wound. It's an 125 kHz RFID antenna. Say, either 2.5mH or 750uH, exact value and DCR negotiable and TBD. I'd like 5- 10 protos to test and tune with before ordering the first production ru...Good custom coil supplier?

Re: Bluetooth

JosephKK - 2009-12-27 17:10:00
On Sat, 19 Dec 2009 15:31:56 -0800 (PST), martin_05 = wrote: > On Dec 19, 3:26=A0pm, martin_05 wrote: > > Looking for an inexpensive way to implement bluetooth data > > connectivity. > > I should add that the criteria isn't purely financial. There are many > advantages to having a...Re: Bluetooth

Layout of RFID/NFC antenna?

sunshine - 2010-03-23 06:09:00
Hi, I have an inkjet printer at hand that is able to print conductive silver ink. This is nice since you can easily try out different designs. Now I would like to print a 13.56MHz antenna for NFC. Does anyone know where I could download a layout file (EPS, PDF, CAD, ...) of some standard NFC ...Layout of RFID/NFC antenna?

Re: Mystery device

John Larkin - 2010-05-28 13:29:00
On Fri, 28 May 2010 09:59:57 -0700, D Yuniskis wrote: > Hi, > > Pulled this out of the recycle bin as it "looked > interesting" :> > > Fully populated PCB but no case to put it in context. > No useful markings on the silkscreen. > > 10 LEDs arranged in a semicircle -- green follo...Re: Mystery device

Re: cat door uses metal detector as key

Eeyore - 2008-12-13 06:13:00
"acannell@wwc.com" wrote: > How about making a metal detector which detects an iron pendant on a > cat collar to unlock the cat door? > > Seems to me a BFO metal detector could easily detect a pea sized iron > pellet, especially since there will be no dirt, and the pellet will be > ...Re: cat door uses metal detector as key

Sinusoidal oscillator configuration

Nick Zalutskiy - 2008-08-24 20:42:00
I am looking for a minimal hardware circuit to generate a 125 kHz sinusoidal wave to be fed into the power stage that is in turn feeding an antenna. The wave is used to generate a carrier frequency for an RFID application. I was thinking of using this [ http://www.ecsxtal.com/store/pdf/ecs-31....Sinusoidal oscillator configuration

Re: Aluminium Foil around Mobile Phone... what will happen ?

Dave Platt - 2009-01-15 17:11:00
In article , Skybuck Flying wrote: > One of these days I will go to my moather and ask her for her mobile phone > and then I will wrap it in aluminium foil. > > And then I will tell (command) her (!) to call herself on the mobile phone ! > :) > > And then I/we will see what happ...Re: Aluminium Foil around Mobile Phone... what will happen ?

Re: No current sense resistor required for MOSFET switch protection

Jim Thompson - 2010-04-07 19:42:00
On 7 Apr 2010 16:37:57 -0700, Winfield Hill wrote: > Jim Thompson wrote... > > > > I love chip processes that have depletion-mode FET's... > > just great for Bandgap starters. > > Don't all fabs have JFETs? Maybe not defined and 'scoped > out, but aren't they at least able to acc...Re: No current sense resistor required for MOSFET switch protection

Re: Smaller, and smaller, and smaller...

Dirk Bruere at NeoPax - 2010-05-04 07:59:00
On 04/05/2010 10:08, WallyWallWhackr wrote: > On Mon, 03 May 2010 22:06:09 -0700, "JosephKK" > wrote: > > > On Mon, 03 May 2010 17:46:57 +0100, Dirk Bruere at NeoPax > > wrote: > > > > > On 30/04/2010 03:44, WallyWallWhackr wrote: > > > > Pretty cool... > > > > > > > > ...Re: Smaller, and smaller, and smaller...

Re: DOS Problem

Archimedes' Lever - 2009-03-24 22:36:00
On Tue, 24 Mar 2009 22:08:41 -0500, Jamie wrote: > Archimedes' Lever wrote: > > > On Tue, 24 Mar 2009 20:11:14 -0500, Jamie > > wrote: > > > > > > > JeffM wrote: > > > > > > > > > > > att wrote: > > > > > > > > > > > > > > > > Every machine had a coprocessor starting...Re: DOS Problem

Re: AC to DC conversion without using diodes and no external supply

Jim Thompson - 2010-07-25 12:31:00
On Sun, 25 Jul 2010 02:25:32 +0000, findprahul_at_yahoo_dot_co_dot_uk@foo.com (rahulponna) wrote: > rahulponna had written this in response to > http://www.electrondepot.com/electrodesign/Re-AC-to-DC-conversion-without-using-diodes-and-no-external-484602-.htm > : > > Jamie wrote: > > I ...Re: AC to DC conversion without using diodes and no external supply

Re: Transmit range of paspoorts/identification cards ?

Chris Jones - 2009-01-12 17:09:00
Pim Schaeffer wrote: > Skybuck Flying wrote: > > Hello, > > > > The dutch goverment wants it's citizens to always carry their > > identification cards with them. > > > > Different dutch goverment websites mention there is a chip in these > > identification cards and can be read b...Re: Transmit range of paspoorts/identification cards ?

Help! Coil design?

Scott Newell - 2009-06-05 19:44:00
I'm having a terrible time getting an air core coil wound for my RFID project. The big problem is that I simply don't know how to specify a coil, and the engineers at the magnetics company can't seem to help me fill in the blanks. Can anyone shed some light on how I should procede? I've tol...Help! Coil design?

in-circuit spectral noise characterization?

BW - 2008-10-21 04:56:00
Hello! When designing ultra low-noise PSU's and related circuits, what do you use to characterize them with regards to noise ? One of my component suppliers for example use an old HP 3571A Dynamic Signal Analyzer, which is a DC-100 kHz spectrum analyzer, with a 50 ohm coax soldered directly o...in-circuit spectral noise characterization?

Re: SmartMeter: power for gas side

Jim Thompson - 2009-08-07 14:16:00
On Fri, 07 Aug 2009 13:07:36 -0500, hal-usenet@ip-64-139-1-69.sjc.megapath.net (Hal Murray) wrote: > PG&E rececntly installed SmartMeters at my place. > http://www.pge.com/myhome/customerservice/meter/smartmeter/howsystemworks/ > (They did it without dropping electrical power or killing the ...Re: SmartMeter: power for gas side

Re: Startable Oscillator

Jim Thompson - 2009-09-08 13:05:00
On Tue, 08 Sep 2009 11:25:47 -0500, Tim Wescott wrote: > On Sun, 06 Sep 2009 01:36:16 -0700, Kolja wrote: > > > Hi, > > > > I need an oscillator circuit that starts immediately with a known > > startup delay from an enable signal. > > Frequency stability should be below 1% over r...Re: Startable Oscillator

Re: Metcal soldering irons

Archimedes' Lever - 2010-05-23 19:33:00
On 23 May 2010 10:12:55 -0700, Winfield Hill wrote: > Archimedes' Lever wrote... > > > > On 23 May 2010 03:35:49 -0700, Winfield Hill > > wrote: > > > > > Glenn Gundlach wrote... > > > > > > > > Yesterday I missed out on a Metcal soldering iron by the bid increment > > > > of ...Re: Metcal soldering irons

Re: Heating-spy-chip usefull for burglars.

Willem-Jan Markerink - 2009-01-13 21:45:00
"Skybuck Flying" wrote in news:c5c86$496d3d0b$d5337e4d$8242@cache4.tilbu1.nb.home.nl: > Hello Mr. Burglar, > > I know your life is difficult as Burglar... constantly wondering to > yourself... > > Is somebody home ? Is there anybody there ? > > Not to worry Mr. Burglar. >...Re: Heating-spy-chip usefull for burglars.

Re: USART configuration on a PIC18F4680 using an external crystal of 32 kHz

ssylee - 2009-02-25 23:36:00
On Feb 25, 8:08=A0pm, John Larkin wrote: > On Wed, 25 Feb 2009 20:10:45 -0500, "Stephen D. Barnes" > > > > wrote: > > ssylee wrote: > > > On a clearer note from my last message, I am hoping to have the PIC > > > receive the data between the rates of 15300 and 15800, even tho...Re: USART configuration on a PIC18F4680 using an external crystal of 32 kHz

Re: Not just floormats

Jim Thompson - 2009-10-21 14:03:00
On Wed, 21 Oct 2009 13:57:41 -0400, "Michael A. Terrell" wrote: > > Jim Thompson wrote: > > > > On Wed, 21 Oct 2009 03:37:41 -0400, "Michael A. Terrell" > > wrote: > > > > > > > > Jim Thompson wrote: > > > > > > > > On Wed, 21 Oct 2009 00:15:34 -0400, "Michael A. Ter...Re: Not just floormats

Re: home automation

miso@sushi.com - 2009-12-08 19:15:00
On Dec 8, 8:03=A0am, Joerg wrote: > m...@sushi.com wrote: > > On Dec 7, 9:59 am, Joerg wrote: > > > m...@sushi.com wrote: > > > > On Dec 6, 3:25 pm, Joerg wrote: > > > > > John Larkin wrote: > > > > > > We have this family cabin in the mountains and we'd like people to = b...Re: home automation

Re: RF energy harvesting project

Jim Thompson - 2010-07-07 17:14:00
On Wed, 7 Jul 2010 13:24:19 -0700, "Joel Koltner" wrote: > "MikeF" wrote in message > news:94b27059-5882-457c-8808-00ce2ca6c455@d37g2000yqm.googlegroups.com... > > Hello, I am working on a senior design project that harvests energy > > from a 45watt UHF Ham Radio transmitter. > > ...Re: RF energy harvesting project

Re: Microwave brain scrambler?

Winston - 2010-03-19 10:43:00
On 3/19/2010 5:49 AM, osr@uakron.edu wrote: > Straw Man Argument, Let me help. http://en.wikipedia.org/wiki/Straw_man I think you (and Dirk and Bill S. and Bill B. and AZ) believe: 1) A microwave brain scrambler is either physically impossible or that it would be tested only in the...Re: Microwave brain scrambler?

Re: OT: Google cars caught snooping

D Yuniskis - 2010-05-15 17:55:00
Hi Dimiter, Didi wrote: > On May 15, 5:40 pm, D Yuniskis wrote: > > > On 15/05/2010 6:23 PM, Didi wrote: > > > > http://news.bbc.co.uk/2/hi/technology/8684110.stm > > > > By mistake, they say. > > > > One wonders if that mistake has been an initiative of > > > > theirs or an assign...Re: OT: Google cars caught snooping

Modding an AM BCB radio for VLF reception

Frnak McKenney - 2008-12-28 22:00:00
I'd like to listen in on NIST's 60kHz time broadcasts on WWVB "directly", but I like building things, and besides, I'm too chea... er, "thrifty" to go out and buy a VLF-specific receiver. Down in the basement (a.k.a. The Gorge of Eternal Electronic Peril) I have a couple of AM/FM clock-radi...Modding an AM BCB radio for VLF reception

Re: USART configuration on a PIC18F4680 using an external crystal of 32 kHz

Raveninghorde - 2009-02-26 16:32:00
On Thu, 26 Feb 2009 13:18:34 -0800 (PST), ssylee wrote: > On Feb 26, 12:23 pm, Raveninghorde wrote: > > On Thu, 26 Feb 2009 11:24:05 -0800 (PST), ssylee > > > > > > > > wrote: > > > On Feb 26, 2:15 am, IanM wrote: > > > > ssylee wrote: > > > > > On Feb 25, 8:08 pm,...Re: USART configuration on a PIC18F4680 using an external crystal of 32 kHz

Re: USART configuration on a PIC18F4680 using an external crystal of 32 kHz

Jim Thompson - 2009-02-26 15:31:00
On Thu, 26 Feb 2009 20:23:21 +0000, Raveninghorde wrote: > On Thu, 26 Feb 2009 11:24:05 -0800 (PST), ssylee > wrote: > > > On Feb 26, 2:15 am, IanM wrote: > > > ssylee wrote: > > > > On Feb 25, 8:08 pm, John Larkin > > > > wrote: > > > > > On Wed, 25 Feb 2009 20:10:45 ...Re: USART configuration on a PIC18F4680 using an external crystal of 32 kHz

Re: OT: Any BCIT EET Grads Here?

Jim Thompson - 2010-03-21 21:37:00
On Sun, 21 Mar 2010 17:48:03 -0700, Jon Kirwan wrote: > On Sun, 21 Mar 2010 17:06:57 -0700, Joerg > wrote: > > > Jon Kirwan wrote: > > > On Sun, 21 Mar 2010 14:26:14 -0700, Joerg > > > wrote: > > > > > > > Jon Kirwan wrote: > > > > > On Sun, 21 Mar 2010 14:57:28 -0400, Ph...Re: OT: Any BCIT EET Grads Here?