Radio Frequency IDentification

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26 views

TRF7970A - (RFID reader) No field output?

Quite sure it's a hardware bug, going to replace the chips 21-4-2015... We've got two 'identical' set-ups with the same code on it... but they both act different... (None works) I'm currently working ...
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16 views

Using the MFRC522 RFID read with an Attiny84?

I'm trying to figure out how to run the MFRC522 RFID reader with an Attiny84. The library that is out for the reader is not compatible with the attiny series. I'm also seeing that the arduino port to ...
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9 views

How to send the RC522 RFID reader into sleep mode?

I'm trying to get the power consumption of a MFRC522 RFID module down, currently while running it consumes about 4mA. There should be a way to put it into sleep mode, I just can't find any ...
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1answer
34 views

Question about Frequency Travel Distance

I've a question regarding the Radio Spectrum and RFID which is confusing to me. From what i learnt about RFID; Low Frequency (125kHz) will have shorter range but UHF will have the longest range. ...
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1answer
38 views

FCC certification for nrf24l01+

Is nrf24l01+ from Nordic Semiconductors FCC certified ? It is hard to find out from their datasheet whether FCC approved ? Is it FCC approved ? If it is approved and I use it in my PCB and control it ...
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52 views

RFID race timing system using raspberry Pi?

I would like to build a race timing system using UHF RFID passive tags. I have seen self build systems described as per the following link which is being used in races with apparent success: ...
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81 views

RFID RC522 with AVR

I'm trying to communicate with RC522 Rfid board with AVR Atmega32L. My mcu running at 3.3V, so, the signals are familiar with RC522 module. Is there a library with native C, (NOT arduino code) for ...
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54 views

RFID tech for PCB identification?

I am looking to use a soldered on RFID "thing" for board ID. The requirements are: a) Cheap b) No power supply needed c) Hand held reader/writer d) In place programming after PCB manufacture Any ...
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2answers
23 views

UHF RFID communication or something similair

I am trying to develop a proximity logger. Basically I have 2 mobile devices (microcontrollers), when the devices are within a 1-2 meter from each other, they should exchange IDs (a simple integer ...
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1answer
77 views

Characterization of Power Harvester

I have chosen a power harvester to power a few things as part of a wireless system. This one is the one I have and it seems to be operational: http://www.powercastco.com/PDF/P2110-datasheet.pdf ...
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30 views

HF RFID 13.56MHz Interference from WiFi/BLE 2.45GHz?

If a Wifi/BLE antenna were placed within a multicoil loop antenna for 13.56MHz HF RFID, would there be significant crosstalk/interference?
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1answer
71 views

Question about RFID Reader Frequency and RFID Tags

I'm researching about RFID Technology as i'm trying to build a RFID Reader using an Arduino and/or Raspberry Pi which i been trying to do so for a month however with no avail. So i been reading up as ...
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48 views

Where is the memory inside this RFID tag

I dissected a RFID tag (Omni-ID). What I found is basically two components (wrapped in white plastic), a metal strip , and PCB having a wire: I want to understand where is the memory to store ...
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1answer
50 views

NFC reader long range antenna

As part of my university project I am trying to read NFC data (13.56MHz) at a longer range (~60 cm). I have already developed code that reads data from the card at close proximity, using libnfc and a ...
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116 views

RFID card reader : wiegand 26 bits but UID tag 40 bits?

I am working on a project of access control with a Raspberry Pi. I want to buy a RFID card reader (125 khz) and tags. After a lot of research on the web, I found out that the most common connection ...
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2answers
52 views

Can I connect RFID tag to a microprocessor?

Is it possible to connect an passive RFID tag to a microprocessor and functions as a receiver? I am new in this,so I need abit of advice on how to do. I've heard alot that it is possible but there is ...
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1answer
49 views

Proximity detection with rfid

I am wondering if anybody has ideas for developing an (Arduino?) system that would use RFID to log occurrences when two people are in close proximity to each other (e.g., <= 1 meter). Ideally, I ...
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75 views

Finding an RFID Reader that reads at 1 meter

I'm looking for some sort of RFID reader that can pick up RFID tags up to a meter away. I was under the impression that this fell under the category of ISO-15693, but I have not found an actual reader ...
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39 views

RFID interfacing with atmega162 problem

I have interfaced RFID and atmega162 as in picture , but I am getting garbage with blank spaces, hypens on lcd , please see my code and tell me whats could be the problem, Hoping for your help. ...
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36 views

RFId interfacing with atmega162

I am new to programming, I have created a schematic of my project I am not sure it would work or not. I have RFID 125khz - Model no RFID6300. Do this module require MAX232 to be used in between ...
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1answer
86 views

How can I find or build a passive RFID tag with a range of 6ft, as well as an associated reader?

I am looking to implement a RFID system that uses trilateration to localize a RFID tag. I have no experience with RFID, and although I have done some basic research, I have no idea where to begin. ...
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1answer
75 views

Arduino Multiplex RFID

I want to build an Arduino based chessboard using Multiplex RFID to identify pieces. I have already build a version using reed switches see chess.fortherapy.co.uk . Having 64 readers would be too ...
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1answer
138 views

Can RFID technologies replace GPS for location/positioning applications? [closed]

I'm looking into a hobby project that would require a central interrogation device querying other devices for their location, as well as other metrics. This central device needs to know exactly where ...
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2answers
44 views

Identifying multipleDC trains on the same track?

I'm modifying my DC train system to control the trains from a small chip onboard (arduino or spark core) and I want the trains to be able to know where they are and the controller to know where they ...
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1answer
23 views

UFH reader Gen2 and tag G2iM+

I'm planning to build homemade UHF reader but I'm a little confused. I've selected reader IC and tag IC. The reader used EPC Gen2 communication protocol. I really like NXP tag IC. But they use ...
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1answer
66 views

Increasing the range of a UHF RFID reader

Okay, so I've got an UHFReader18 UHF RFID Reader from China, which can be seen here: http://www.aliexpress.com/store/product/Popular-800mm-UHF-RFID-Desktop-Reader-6B-6C/413622_598715812.html. The ...
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1answer
45 views

How to detect several agents within a radius, what is the best and easiest way to do it?

I have a room with 30 objects which may or not be present, and I want to be able to detect which objects are in the room. My first idea was to attach a RFID tag to each one of these objects and have ...
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74 views

Looking for datasheet on 2 ST Micro ICs re: RFID

I have an RFID reader as a separate PCB (purchased from seeedstudio: item) of which I wish to incorporate the key ICs into my own PCB. Apart from a 16Mhz crystal and the necessary caps and resistors, ...
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4answers
107 views

Determining distance between wireless sensors - sailing project

I'm looking for a solution which will allow me to determine the distance between two points, one of which is static and the other not. It's part of a project I'm working on which will involve the ...
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1answer
48 views

Measuring Stride distance wirelessly

I'm trying to fit two sensors in a shoe each (such that each shoe has one sensor). their purpose being to calculate the stride length of a person, as a person takes a stride, the distance between two ...
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2answers
62 views

Set RFID frequency

I hope someone can help me with a doubt about the way RFID works, regarding communication with RFID tags. I am working with a Motorola FX7400 reader, I know it works in a frequency range (902-928 ...
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4answers
108 views

RFID tags inside metal items?

Is it possible to use an RFID tag inside a stainless steel enclosure? I am looking for a way to uniquely and easily identify a sensor. An alternative possibility is a laser engraved bar code.
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317 views

Getting to work RFID-RC522 reader / writer with Teensy 3.1

I am trying to use the RFID-RC522 reader / writer together with a Teensy 3.1. I cannot get it to work. I always get the error: MFRC522 Software Version: 0x0 (unknown) WARNING: Communication ...
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1answer
100 views

Need help isolating source of interference

I'm pretty new to electronics, but have been successfully working with a Spark Core (www.spark.io) and some simple drivers/circuits for now. That said, I've run into a problem. I have a Spark Core ...
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1answer
49 views

Safety advice for best EMF detector and body shielding for UHF RFID reader

I've got a UHF RFID detector (860 to 960 MHz). I'm just getting into configuring the power output but I think I've been testing it at about 20dBM, I might want up to 30dBM. I'm concerned about my ...
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1answer
44 views

RFID and NFC how they work? [closed]

could some one explain me these technologies? I understand the main difference is the strenght of the signal. If im trying to automatically send an alert to any smartphone (able to receibe it) can i ...
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107 views

Self tuning 125khz RFID reader

I have a RFID reader based on the EM4095 IC. I would like to make the reader self-tuning so it can handle varying inductance in the antenna due to reading tags near metal. I had thought of using a ...
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95 views

How to increase the read range of an active NFC tag?

I want to read a NFC tag at a distance of 1m from my NFC enabled smartphone. Is it possible to do so by enhancing the antenna of the NFC tag (not the one on the phone). Size of the NFC tag is not an ...
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113 views

How to use Mifare RC522 RFID card reader without mains power?

I want to make a simple home security system. I'd like to be able to have an RFID card reader near my door. All members of the family will swipe in and out, and when everyone is out, the web cams will ...
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3answers
99 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 ...
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251 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 ...
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81 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 ...
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1answer
220 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 ...
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1answer
166 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 ...
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1answer
73 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 ...
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1answer
118 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 ...
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1answer
171 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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104 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 ...
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1answer
83 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 ...
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63 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 ...