Radio Frequency IDentification

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-3
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0answers
23 views

calculate facility code and card number from 26 bit Weigand data from card reader [on hold]

I need help in calculating the facility code and card number from the weigand string that I get from the reader further more I need to know how to read both these from a card.
0
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2answers
50 views

Continually reading an RFID Tag

I am attempting to build a system which stays active when an RFID tag is present and then deactivates when it's removed. RFID readers seem to have an output that fires once when the tag is in range ...
0
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0answers
51 views

Cloning a rfid tag with arduino

My school uses RFID tags to turn on air conditioners and only professors have it. This is to prevent students leaving the air conditioners turned on. I've been thinking about cloning a tag just to ...
1
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0answers
49 views

RFID reading / sniffing demonstration at a live-event

In the context of a live-event, we want to demonstrate how easy it is for someone with the right equipment to sniff RFID devices, including clear-text information. Our idea is to hide a RFID reader ...
0
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1answer
79 views

Relation between SPI, clock rate and data bits in microcontroller

I am working on a project which requires a UHF RFID Reader IC AS3993 having an 8 bit Reader MCU. And an externally connected LaunchPad (SimpleLink LAUNCHXL CC3200) for data transfer which works at 16 ...
1
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1answer
58 views

Determine the working frequency band of unknown RFID chip

I have a passive RFID chip from which I would like to scan the ID. I have a standard USB RFID Reader, but this doesnt print out anything. This reader scans the 120–150 kHz range, so the chip must ...
0
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1answer
42 views

Passive RFID transponder timing system

I'm looking to build a timing system base on passive RFID transponder. This is how I see it : An antenna to "question" the tag An antenna to receive tag unique ID A tag with unique ID I would like ...
0
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1answer
52 views

125kHz RFID output interpretation

I'm using the RDM6300 125kHz reader module in combination with Arduino Uno to read my tags. The tags themselves have their ID as a label. When I then try to read the cards, I receive another ID as ...
-1
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1answer
73 views

Is it possible to emulate Mifare Ultralight? [closed]

Is it possible to emulate mifare ultralight disregarding the specification, so that electronic tickets can be infinitely used? Mifare Ultralight has 16 pages with 4 bytes each. There are control bytes ...
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0answers
30 views

Is it possible to emulate RIFD ISO 15693 UID tags

I found that is it possible to emulate ISO 14443 and found ICs that does perform that function (Example PN532 from NXP), but I am struggling to find an off-the-shelf IC that does ISO 15693. So before ...
0
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1answer
63 views

Can I use a RFID reader to check if there is an physical obstacle between it and the tag?

I am trying to create a cheap system that check if there is someone sitting on a chair. I would like to know if there is someway I can configure a RFID reader so it identifies when there are ...
0
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0answers
62 views

Theft alarm for retail?

Say I have a coffee shop with a bookcase filled with books for people to read for free while they drink their coffee. Now say that I want to stop people from placing the book in their backpack and ...
1
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1answer
70 views

What kind of RFID reader do I need for library books?

My local public libraries are switching to RFID tags for check-in/check-out. I'd like to get a RFID reader to read these tags myself, but I don't know what I need. The stickers they put in books ...
1
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2answers
79 views

DIY passive RFID? [closed]

I'm interested in building my own "DIY" RFID scanner and tags. For the scanner, I think I would just need: Transceiver Some kind of hardware polling mechanism to have the scanner scan, say, every 2 ...
0
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2answers
68 views

use RFID ( or what else? ) for a broad distance measurement in 1-2 meter wide area

Let's suppose we have a suitcase containing some RFID tagged objects. With a reader contained in the same box, I periodically poll the content in order to check if something is removed from the ...
1
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1answer
44 views

Tuned circuit value switching

I've been playing around with some LF RFID tags and want to create a EM powered sensor tag (ie, a normal passive tag). Ideally the tag should power up for a couple of mS, take a sensor reading (which ...
1
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0answers
83 views

Building RFID 125kHz Smart Shelf

RFID 125kHz card readers are very cheap (< 5$) and very simple (USB Plug & Play). Is it possible to chain / multiplex 20 readers to create a very accurate plug-and-play smart shelf? What are ...
1
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2answers
115 views

Position tracking system for frisbee

I'm trying to build a smart frisbee for use in Ultimate. I'd like to be able to track the position of the frisbee in a playing field with pretty good accuracy (within ~2ft). GPS is a possibility, but ...
0
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1answer
153 views

Detect presence of Passive HF/LF RFID TAG with BT 4.0 (NFC not supported) [closed]

Trying to understand if with current capabilities of Bluetooth 4.0 / Smart / BLE, is it possible to detect a passive RFID TAG, within a very short range (less than 5cm). New phones both Android/iOS ...
-1
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1answer
55 views

Find out about RFID type

We are using RFID access badges at work. How can I tell what kind of system is at place (frequency, Mifare derivative). I don't have any experience with RFID systems, which one would be the most ...
4
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2answers
488 views

Battery life with a CC3000 WiFi beacon

We're experimenting with using a WiFi module as a battery driven beacon or RFID tag. The cheapest module out there with plenty of documentation (thank you Adafruit) is the Texas Instruments CC3000. ...
0
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1answer
35 views

Determine which RFID is closer

Apologies if this is a simple question, I'm very new to hardware. I'm wondering if using PN532 NFC/RFID controller (http://www.adafruit.com/products/364) I can determine which of two RFID tags is ...
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0answers
39 views

Detect unathorized access in RFID security system

I have a question about RFID security system and tags when implemented in traffic monitoring system. The scenario is a 1) Reader and a 2) barricade which is some 2 meters ahead of reader. Now how do ...
0
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2answers
111 views

RFID data transfer rates?

I'm learning about RFID and am trying to figure out what the data rates are for the different types of RFID technologies. I've learned that there are three different frequencies tags and readers ...
0
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1answer
178 views

Design RFID tag that works with Bluetooth

Is it theoretically possible to engineer manufacture a RFID tag that works within the Bluetooth wavelength range allowing a standard booth-tooth device (a phone for example) to power and pick up data ...
1
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2answers
148 views

Can an iphone/android cell phone communicate with RFID?

Is it possible for a cell phone to communicate with an RFID chip? I'm looking for a low-powered solution to turn a device on/off wirelessly, using a cell phone. Example: phone sends signal to RFID ...
4
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3answers
737 views

DIY NFC boosting antenna for a mobile device

I am very new to this. I'm a dentist trying to improve client flow in a busy office. I would like to develop a cheap proof of concept for an NFC enabled client tracking system using a hacked mobile ...
0
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2answers
118 views

Can the range of a monostatic RFID antenna be increased using an amplifier?

How does an RFID reader monostatic antenna both transmit and receive at the same time, are they CW or pulsed? I would like to extend the read range of a reader by using an amplifier between the ...
1
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1answer
102 views

RFID system to detect a specific object 50 cm away

I am prototyping an RFID system that can detect a specific object about 50cm away. I've tinkered with the idea of proximity sensors but the issue there is the inability to strictly trigger when a ...
0
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1answer
70 views

125 kHz RFID Antenna Measurement using CRO - Passive Probe

I have a coil inductor and a capacitor in parallel set to the resonant frequency of 125 kHz for receiving RFID. There is no issue with the operation of my circuit but I would like to measure the ...
4
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2answers
168 views

Simple RFID reader - AM demodulator not working

I'm currently working on building my own simple RFID reader. I've already build a small circuit in which my coil is fed from 5V current source or is connected to ground dewpending on the 125kHz square ...
1
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2answers
82 views

Is it possible to provide security in Passive RFID tags?

I am working on a project, where I am using RFID tags, and RFID reader for some sort of authentications. But after searching for a while, I found that passive RFID tags can be cloned. Is there any ...
0
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1answer
218 views

DIY RFID reader antenna array

I want to build a DIY RFID reading system that can read a wide surface area. My idea is to connect one single PN532 chip with multiple RFID antenna using multiplexing. The antenna must be as thin as ...
1
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2answers
91 views

RFID + permanent magnet

A project I'm exploring requires placing a permanent magnet in close proximity to an RFID tag (within a cm or so). Can an RFID tag be read when there's a permanent EM field so close to it?
1
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1answer
69 views

RFID distance transmitter

I am looking to have a program which would alert me whenever a certain RFID tag would no longer be read, however I don't want to use NFC since I need the distance to be of at least 50cm+. Is there ...
0
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2answers
181 views

How to interface 3 serial devices to AT89S52 microcontroller?

I have to interface GSM, GPS and RFID to one microcontroller (Atmel AT89S52). The GSM and GPS can be switched using relay but I can't find a solution about RFID.
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2answers
189 views

UHF RFID reader ability to recognize tags in less than 1 m reading distance

If the UHF RFID reader basic reading distance is up to 5 m, if adjusted to be less than 1 m or to be up to 1 m, can it be able to recognize all the tags? Or since it's for mid range reading, the ...
1
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3answers
170 views

RFID tag and their usage

I am playing around with RFIDs and want to detect when an android phone is about atleast 10-20 meter away. I planned to use an RFID tag but need the tags pin broken out so that some interrupt line ...
0
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1answer
930 views

What can I do to increase passive HF RFID read range?

I am working on a prototype, one function of which is to detect whether an object is "in range" by a few cm. Right now I'm just using an Arduino and a cheap Mifare RC-522 kit that operates at 13.56 ...
1
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0answers
237 views

Arduino with RFID and SD [closed]

I want to duplicate an RFID card. Everything except for that what have an only read state. I thought: I save all the data of the card (which one I want to duplicate) on an SD card with an RFID RC 522 ...
0
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0answers
29 views

DESfire reader TCP/IP Communication

am only a newbie to this RFID or DESfire stuffs. Actually my question is to understand how the RFID reader communicate over TCP/IP or how that is going to work. If possible please post the answers ...
1
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1answer
66 views

Passive RFID through objects

I wanted to build a device to track the stuff I have in my bag. I wanted to use passive RFID tags which I would place on my objects. The problem now is that I don't have much experience with RFID ...
-1
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1answer
93 views

Find the strongest received signal strength between transmitter and receiver in RFID technology

What I want to do it is measure strongest received signal for detection between receiver and transmitter. I have read the received signal strength (RSS) from tag-RFID to find the location of the tag. ...
2
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2answers
121 views

low-cost idea for Identifying passive tags by inductive coupling/pulses

Hi electronics experts, I want to build a circuit that can identify few (4-10) tags wirelessly by proximity. No need for multiple simultaneous detection. I don't need any memory on the tags - just a ...
4
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2answers
155 views

Monitoring Use of Surgical Tools

First of all, I'm a biologist, so please let me know if this question is being asked in the wrong place. I regularly perform operations on rats and recently stumbled upon the following paper ...
2
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1answer
94 views

RFID sources and battery lifetime

I'm trying to do high value asset monitoring within a panel van/truck with RFID tags. So this would be a case of a 3m+ range with metal everywhere - mowers, digging equipment, jackhammers etc. A local ...
2
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2answers
336 views

RFID vs Bluetooth

I'm working in a project, where we are developing a system to detect whether a truck was or wasn't there. Consider that the place is far away from any kind of source as energy, etc., and we need the ...
1
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1answer
840 views

Read some (unknown?) RFID tags with a chinese reader / writer (125kHZ) [closed]

Some months ago I bought this 125kHz RFID Reader / Writer from eBay. I was wondering how can I actually read or write an RFID Tag with it. So I attached it by usb to my computer (running Linux) and ...
0
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2answers
88 views

RFID on humans, is RFID the right method?

Me and my friends have thought of a few RFID solutions. One of them involve creating RFID tracking system to detect sailors out in the sea within 5km via a tablet or pc. Can this be done? ...
2
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1answer
196 views

RFID Based Listening Device

I was just trying to make a passive cavity resonator based listening device just the same way as Leon Theremin did (the great seal bug). I know that I am to use metallized mylar film as the diaphargm, ...