rfid

Hi everyone, I’m working on a project where I want to use RFID tags to trigger a digital business card on a phone. The idea is to scan an RFID/NFC tag and open a webpage or contact info automatically — like an NFC business card. I’m using the PN532 NFC module and a Raspberry Pi 5. I’ve tried...

Hello! After a little back and forth, I’ve decided on trying my luck with RFID for identifying Chess Pieces on a board. I’m thinking of using PN532 RFID readers to identify the tags under chess pieces. These PN532’s would be plugged into their own little microcontroller, and then those would...

Heya! I want to design a chess board which can ID the various pieces. I’ve read plenty posts here before, and I want to clarify I would like there to be no visible electronics and for the identification to not rely on pre-programmed positions. I’ll be using Arduino 4, but i’ve got a Raspberry...

Hello, I am trying to understand how the ASK 125KHz RFID reader on page 140 of this pdf works (4.0 ASK READER SCHEMATIC, Page 134 of the document): https://ww1.microchip.com/downloads/en/devicedoc/51115f.pdf My understanding is that RFID data is modulated on a 125KHz carrier signal and the...

I'm trying to make an RFID chessboard, but using one reader underneath each square would be expensive. So, after some research, I found in a lot of places people using RFID antennas underneath each square and only one reader, but they don't provide a lot of details about it. So, how can I design...

Hello, M.Zain here I want to use cm710 4 RFID module, I am making a system for RFID tag localization in which I will implement Angle of Arrival estimation and other different algorithms to locate the coordinates of the RFID tags. Does anyone know how can I do this using this module. I think...

Hello, I did some google searches for my project, and came upon this forum, so hoping it fits the forums purpose. Here is what I’m looking at doing: I have two vehicles under a local carwash companies monthly “unlimited subscription”. They just implemented RFID stickers for the system to...

I want to play music from dfplayer mini with an rfid card reader. When I set up the circuit on the plate, I get a voltage drop, I don't know why, very meaningless ı use 5vto3v3 ams1117, entry 10uf exit 10uf and normally I was going to feed it with tp4056, I would switch my circuit with a...

Hello everyone, I'm working on a project to communicate between two boards OTA (over-the-air) but within close proximity. I could consider LED/laser based communication, but that is too directional. WiFi or BT are wireless, but using them increases the BoM cost. I considered NFC/RFID, but all...

So I have a project I'm working on a project to light these "NFC fingernail lights": They light up when in the presence of a 13.56MHz RFID field. The issue is other than my phone, I have no way to light them day to day. I would like to develop a device I can hold, like fist semi closed and it...

I'll try to be as concise as possible. I'm an engineering student tasked by my university to create a mouse trap that alerts caretakers the trap has gone off. There is already a product on the market that achieve this but need to be hooked up to a wifi signal. The problem is that the university...

I bought this antenna for my Sparkfun Simultaneous Reader, but I don't understand which jumper will do what function. The antenna didn't come with datasheet and I can't find it on the Internet. I tried connecting different jumpers and tried to make sense what jumper will do what, but can't...

Hello everyone I'm newbie to RFIDs and I would like make large area reader. I found antenna from the Taobao site. Which is 45x30cm coil antenna. But the problem Is I can't seem to find reader that can use that large antenna. Any suggestions or help will be appreciated. Here is the antenna link...

I am brand new to Arduino programming and am having a difficult time getting my code to compile. The goal is to create a puzzle with four readers and to compare the UID codes and readers against a known key. In other words, put the tags in the correct order and the puzzle will unlock. I have...