Questions about RFiD

Started by Bullwinkle in sci.electronics.design6 years ago 22 replies

Hi, I've read a book about rfid and i've some questions about (i'm totally a newbie in this field): 1. a standard for active rfid at...

Hi, I've read a book about rfid and i've some questions about (i'm totally a newbie in this field): 1. a standard for active rfid at 433MHz-850/950MHz-2,4GHz is present or not? 2. I've read about active rfids based on zigbee (or wifi): i don't understand why i should use a zigbee/rfid combination and not only zigbee...EPC and other related data could be saved on end device's memory, so i s...


RFID

Started by Anonymous in sci.electronics.design4 years ago 10 replies

Hi, I want to write my PC application able to work with RFID devices and i'm looking for an SDK able to: 1. Write RFID card registers 2....

Hi, I want to write my PC application able to work with RFID devices and i'm looking for an SDK able to: 1. Write RFID card registers 2. Compatible with MIFARE CLASSIC/ULTRALIGHT, FELICA, DESFIRE 3. Compatible with windows8 and linux 4. Good support with API and documentation 5. Compatible with open stacks (for example with openNFC) Point 5 is not strictly necessary but preferable. An...


OT: RFID tag repair

Started by bitrex in sci.electronics.design2 years ago 5 replies

The Chargepoint cards used to activate the Chargepoint EV charging stations without a cellular connection use RFID tags - you just swipe...

The Chargepoint cards used to activate the Chargepoint EV charging stations without a cellular connection use RFID tags - you just swipe them in front of the stand and the plug unlocks. It's one of those ideas seems cool in theory, except that the RFID tag keychain cards they provide are very filmsy, and if you leave them in your pocket for any length of time the lamination comes ap...


RFID

Started by Rick in sci.electronics.design5 years ago 5 replies

Anyone here well versed in RFID design and integration?

Anyone here well versed in RFID design and integration?


RFID tags in Arctic conditions?

Started by Fatfreek in sci.electronics.design10 years ago 6 replies

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...

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 very cold environment with the possibility of deep and total snow cover. Readers would be protecte...


rfid system guidelines?

Started by poster in sci.electronics.design9 years ago 1 reply

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...

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 have temp sensor in tag?


Ping: Joerg

Started by Jan Panteltje in sci.electronics.design9 years ago 3 replies

Joerg, maybe this will interest you: RFID tags stop medical equipment: ...

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


RFID tag to erase or zap

Started by blisca in sci.electronics.design10 months ago 3 replies

Good morning, once more i ask for some little help. An item has to be sent to a potential customer,that could became a potential...

Good morning, once more i ask for some little help. An item has to be sent to a potential customer,that could became a potential competitor. Inside a part ,an RFID tag is buried,and i would like that nobody else could read the data in the tag. I tried unsuccessfully to destroy it in 2 ways: 1)An hobbystic Royer oscillator,tuned on the frequency of the tag(125 KHz) 2)An EMP pulse,abou...


Need to know how to design the RFID antenna.

Started by Anonymous in sci.electronics.design9 years ago 3 replies

Hi, I want to learn how to design RFID antenna. Do any one could help me out with this. Thanks. Chinthu

Hi, I want to learn how to design RFID antenna. Do any one could help me out with this. Thanks. Chinthu


Simple circuit to find lost passport

Started by OBones in sci.electronics.design7 years ago 47 replies

Hello all, My passport is somewhere inside my apartment but for the life of I can't remember where. I have looked at all the obvious places...

Hello all, My passport is somewhere inside my apartment but for the life of I can't remember where. I have looked at all the obvious places and I could not find it. Now, this is a new "biometric" passport with the RFID chip inside. So I'm looking for a simple and most of all cheap circuit that could activate the RFID chip and so tell where (roughly) that little bugger is hiding. At l...


RFID - the Disney way, two frequency bands

Started by Winfield Hill in sci.electronics.design5 months ago 15 replies

Disney theme park customers have special RFID bands, called MagicBand, helping them use the parks. A 13-month old Wired article called this a...

Disney theme park customers have special RFID bands, called MagicBand, helping them use the parks. A 13-month old Wired article called this a $1B bet on their MagicBands, but such an expenditure would have been more on the back end, rather than on the bands themselves. https://www.wired.com/2015/03/disney-magicband/ At the time, Disney was quite forthcoming with tech details, photos and t...


How can it work?

Started by Piotr Wyderski in sci.electronics.design2 years ago

http://scanlime.org/2008/09/using-an-avr-as-an-rfid-tag/ The hacks are described, but the question is: why there is no MCU latch-up when any...

http://scanlime.org/2008/09/using-an-avr-as-an-rfid-tag/ The hacks are described, but the question is: why there is no MCU latch-up when any of the ends of the coil connected to the clock pins goes below GND? Best regards, Piotr


New $100 Notes - Electronic Securty Features

Started by Anonymous in sci.electronics.design4 years ago 25 replies

Someone told me the new US $100 notes have a built-in microchip, or RFID tag. Does anyone have further info on this? Martin King

Someone told me the new US $100 notes have a built-in microchip, or RFID tag. Does anyone have further info on this? Martin King


Book recommendation?

Started by Anonymous in sci.electronics.design8 years ago 10 replies

Hi all, Can anyone recommend a good book about how to connect different chips from different manufacturers into a single device? E.g.,...

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 for "Electrical Engineering" on Amazon, but those books only tell you how to make each individual pa...


Help! Coil design?

Started by Scott Newell in sci.electronics.design8 years ago 21 replies

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...

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 told them I'd like a 750uH coil with a max OD of 40mm to fit our physical constaints. Exact DC resist...


RFIDs close to HV power lines

Started by Efthimios in sci.electronics.design9 years ago 3 replies

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...

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???


Good custom coil supplier?

Started by Scott Newell in sci.electronics.design8 years ago 3 replies

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....

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 run of 500. (I'm in a bit of a hurry, as well...) Here's an example of someone else's similar de...


Layout of RFID/NFC antenna?

Started by sunshine in sci.electronics.design8 years ago 1 reply

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...

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 antenna? I tried to find, but could not find any. By the way, the sheet resistance of the printed s...


electronic key operating voltage ...

Started by Winfield Hill in sci.electronics.design2 years ago 31 replies

My car's key takes a 2032 lithium battery. These keys are awesome: Never take the keys out of your pocket, either to open the door or to...

My car's key takes a 2032 lithium battery. These keys are awesome: Never take the keys out of your pocket, either to open the door or to start the car. After > half-decade of operation, suddenly without warning it stopped operating, whoa how to get stranded! Heck, I didn't even realize that my RFID required a battery! OK, yes with its long range that should have been clear


Sinusoidal oscillator configuration

Started by Nick Zalutskiy in sci.electronics.design9 years ago 17 replies

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...

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.pdf ] crystal in a Pierce Oscillator configuration. However I am not sure if this crystal will wor...