Radio Frequency IDentification

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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
34 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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28 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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54 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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59 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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36 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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45 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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1answer
53 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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87 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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59 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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135 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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102 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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140 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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23 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
55 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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1answer
44 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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1answer
76 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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2answers
154 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
77 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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169 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
351 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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2answers
76 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
111 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, ...
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1answer
83 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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123 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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215 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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748 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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70 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
216 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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103 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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114 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
174 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 ...
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193 views

Arduino RFID reader and pin current sourcing

I'm thinking about building the DIY RFID reader described here http://playground.arduino.cc/Main/DIYRFIDReader, with an arduino uno. For the LC filter, I have a 330uH inductor at home (and I'm using ...
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127 views

How to start on RFID?

I want to start with the RFID by building up a simple lock which can be unlocked with another RFID transponder. The device which has unlocks the lock and has one RFID transponder will be a ...
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200 views

Is RFID the right solution

I'm an industrial designer with limited knowledge of electronics and was looking for some help. I am in the process of developing a dementia care product. The idea is to manage the access residents ...
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141 views

Can I use a NFC ring as an Oyster card?

I've been looking into converting a MIFARE (Oyster card) into a ring. I found this NFC ring on kickstarter, will that work as an Oyster card? Or are they different technologies?
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104 views

Home triangulation system?

I'm a messy person, and I often have trouble finding items in my workshop. I was thinking that maybe a home triangulation system and device might help. I've considered using RFID tags on most of my ...
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RFID kits for experimenting [closed]

I need a RFID kit for some experiments, can anyone recommend me a good one (low or high frequency are fine), maybe from Texas Instruments? It should provide API for communicating and programming, best ...
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60 views

What are some good resource for learning how car key and wireless door lock systems work?

I understand that most car keys include a 434MHz transmitter, as well as 125KHz RFID transponder. The 434MHz transmitter is used for operating the door locks, and the 125KHz RFID transponder is the ...
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286 views

Single RFID reader w/passive tags for long (2m) AND short (1cm) range?

I am looking to build an RFID system that includes both long range and short range readers. One passive RFID tag will be used for both readers. I've considered using two tags but it is not the ideal ...
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72 views

How do I detect user proxmity to lock PC.?

I can use one of the many open source usb keyboard projects that will run on an atmel avr to send Win+L to the computer when the user leaves. The question is: What sort of technique can I use to ...
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1answer
184 views

Developing a new System… confused between RFID or NFC.. just a few questions

I know NFC is the new in thing and it may go a long way specially w/ payment systems. I'm new to this wireless tags thing. I'm a PHP applications developer and I'm gona do a few applications like ...
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368 views

Raspberry Pi with SPI RFID reader/writer

I've been using Arduino for years and am now transforming to take a sip on the Raspberry Pi. I've been using the MF522 13.56 MHz RFID reader in my Arduino projects. It uses an SPI interface to ...
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291 views

Senior project using RFID technology - is this feasible?

The project is to implement object localization using RFID technology. The idea is to have objects tagged with RFID tags and have one (or several) readers that will locate the objects' position. The ...
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1answer
306 views

Multiplex 125kHz RFID antenna

I'm looking to follow up on a question (asked by another) that wasn't answered to my satisfaction in another question. RFID Antenna Array I am successfully using the ID Innovations ID-2 chip to read ...
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1answer
152 views

Extremely Cheap Geeky Code System [closed]

I'm hoping to create a really geeky 'capture-the-flag'-style checkpoint event. The goal is as follows: Team A goes to Checkpoint 1 and, using some kind of device, scans a chip left at Checkpoint 1 ...
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63 views

Can RFID readers submit scanned data to one location?

Let's assume that I have lots of RFID readers, is there a way, either a specific product or peripheral that allows the reader to send data about the tag it scanned over a distance of about 500m - 650m ...
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387 views

Is there an electronics reason why implantable RFID capsules are made of glass?

I am curious why implantable RFID capsules are made of glass because they create a huge risk of breaking under the skin causing some serious trouble. I would guess a silver/titanium encasing will be ...
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355 views

Alternatives to an RFID reader [closed]

For my Engineering project this semester, I proposed a luggage tagging system using integrated RFID. I know you're all thinking yes this has been done, but for my final presentation I'm looking for a ...
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542 views

Howto use/shield NFC/RFID Sticker on back of iPhone 5? [closed]

I want to stick a RFID sticker on the back of an iPhone 5 (between a case and the iPhones back to be precise). The sticker is an Mifare DESFire EV1 sticker, in case that matters. Problem is, the tag ...