Radio Frequency IDentification

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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 ...
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22 views

RFID smart bookshelf and Arduino [closed]

We're trying to make smart bookshelf in our office for books tracking. Basically the requirements are: 1) Each person in office must attach RFID card to the RFID reader and only then take the ...
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1answer
59 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 ...
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52 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 ...
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57 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 ...
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23 views

Reading Datawatch Access Cards

This question may be on the edge of off-topic, but I'll try anyway. I want to know what type of cheap off-the-shelf rfid-to-usb reader could read a Datawatch Systems RFID access card. My intention ...
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1answer
40 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 ...
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64 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 ...
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2answers
98 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 ...
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1answer
90 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 ...
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1answer
53 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 ...
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386 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. ...
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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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38 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 ...
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2answers
88 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 ...
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1answer
81 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 ...
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2answers
81 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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1answer
322 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 ...
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2answers
81 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 ...
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1answer
90 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 ...
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1answer
60 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 ...
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2answers
135 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 ...
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2answers
75 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 ...
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122 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 ...
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66 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?
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68 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 ...
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157 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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143 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 ...
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3answers
164 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 ...
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1answer
543 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 ...
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214 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 ...
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27 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 ...
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1answer
63 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 ...
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82 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. ...
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106 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 ...
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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 ...
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1answer
85 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 ...
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2answers
277 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 ...
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1answer
689 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 ...
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86 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? ...
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1answer
153 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, ...
2
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1answer
117 views

RFID system for insect tracking - range of reading

I am planning on conducting an insect-tracking experiment in the field. We are going to have square enclosures (15m x 15m), where our insects can move around freely, but will not leave the enclosure. ...
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263 views

Power requirements for NFC (RFID) chip

I'm new to electronics so please bear with me. I'm trying to work out what kind of battery would be required to use with the following chip: ...
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2answers
316 views

13.56MHz RFID Antenna design

I am currently in the process of building an RFID access system for my house + car. I've worked out the software side (I am using an arduino) but am having difficulty with the hardware side. I bought ...
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1answer
1k views

How electronic price tag works?

Today I was in Tesco in my city and I saw something quite interesting, that was electronic price tag: I don't know how it happend, but on a parking I found this price tag in my basket beneath some ...
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1answer
95 views

ISO 14443 Type B REQB fails to cause a response

Am I performing a reasonable REQB? What might be going wrong? In attempting to perform my 1st ISO 14443 Type B communication with a bit-banging RF interface I do not receive any response. Same ...
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1answer
249 views

Can I use serial port and RFID reader on Arduino Pro Mini?

I have Arduino Pro Mini, HC-06 bluetooth module, and Mifare RC522 RFID reader. Bluetooth module connects to serial port, and RFID connects to SDA, SCK, MOSI, MISO, ground, reset, and 3.3V pins. I want ...
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1answer
121 views

Arduino Project Idea: RFID or Bluetooth or What [closed]

I am planning on creating interactive building blocks that talk to each other and know which block is beside each other. I am using an Arduino Uno SMD Edition to create this project. My question is: ...
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1answer
162 views

how to configure radio registers of cc2500 and cc2511 to 250 Kbps and 500 Kbps?

-I'm using cc2500 and cc2511 transceivers in my project.One in transmitting data, and the other is receiving -I am using cc2500 at target board and cc2511 at host side. -I am able to communicate ...
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1answer
242 views

UHF RFID Read Ranges

I'm experimenting with UHF RFID. I have a setup that's working but my read range is only 1 - 2 feet. This is the equipment I'm using, it's all quite cheap, I don't mind spending more to increase the ...