This is an 125 kHz RFID reader that is based on ATtiny13 micro-controller and an LM358 Operational Amplifier. No special RFID chip is used. The reading, decoding and printing the unique ID from 125 kHz RFID tags is made entirely in software by ATtiny13.
125 kHz RFID reader based on ATtiny13 - [Link]
The RFID (Radio frequency identification) technology steps-up in the modern age in the field of access system, identification, protection system and so many places. In this project, we are using this as an door opening as well as door closing system based on the RFID card number identification. [via contact form]
RFID Based Door Opening System - [Link]
RFID modules SL102 and SL500A are readily usable and provide many useful functions.
Similarly like in other segments of electronics, even at RFID you have a possibility to assemble a target device from components themselves, from modules, or to use a complete ready-made module, which is pluggable to a PC, often already with a SW included. SL102 and SL500A modules represent the „3-rd group“ from this point of view and provide a ready-to-use RFID solution.
• SL102, 125 kHz RFID reader – USB keyboard emulator. That means, that after SL102 appears as a keyboard after connecting to a PC (PC automatically recognizes it). SL102 operates in the way, that after reading an RFID tag, it sends its ID in the same form as if we typed it via a keyboard (and finished it be pushing „Enter“), i.e. every ID is in a new line. It is only necessary to open any program in which it is possible to enter numbers via a keyboard (excel, notepad, word,…). This system is very convenient for example for tracking of goods in production, in stock (stock in, stock out) but also for admission systems and many other.
• SL500A,Mifare 13,56 MHz reader/writer with the USB interface (virtual COM device). SL500A is able to read and write Mifare_1k, Mifare_4k, UltraLight and Mifare_ProX cards (ISO14443A, ISO1443B and ISO15693 protocols). SL500A is supplied with the software, including a DLL library and examples. SL500A can be used by a supplied SW, but you can also create your own application best suited to your needs.
“Plug’n’play” desktop RFID modules with a USB interface - [Link]
RFID system DESFire EV1 enables substantially more than only an identification. Access systems, public transportation, loyalty programs, those are only few examples of usage of this system.
Similarly like every system has its hierarchy, even in the RFID can be found simpler but also more sophisticated technologies. DESFire EV1 working at the 13,56 MHz frequency belongs to a top in an RFID, that´s why it can be found mainly in payment systems, public transportation and other areas, where fast read/write on the card, various applications on the card and mainly highly secure communication are beneficial. An advantage of the system is also its anti-collision design – important in the case, when several cards are in the range of a reader. Relatively big memory (2, 4 or 8 kB) enables to store a considerable amount of data in various files. DES/2K3DES and mainly 3K3DES and AES encrypting algorithms takes care for a secure communication.
New DESFire cards in our portfolio DESFIREEV14KISO and DESFIREEV18KISO are suitable for all Mifare/DESFire readers like for example SL040A. For a full usage of cards potential, it is necessary to use a device able to read but also to write, like for example SL032 and SL500A-USB. . Many useful information can be found at www.mifare.net
RFID DESFire EV1 – one card for more applications - [Link]
The OpenBeacon project was founded in 2006 by the Berlin located company Bitmanufaktur GmbH as an open platform for active RFID applications operating in the license free 2.4GHz ISM band. OpenBeacon is based on Open Source software and a very flexible and reprogrammable lowcost Open Source RFmodule. The firmware sources and hardware schematics are available under GPL license. We encourage the development of new ideas for OpenBeacon setups and firmware improvements.
This wiki collects and maintains all user and developer documentation of the Open Source and Open Hardware Active 2.4 GHz RFID reader system and our Open Source and Open Hardware active RFID tags.
OpenBeacon Active RFID Project - [Link]
Mifare and DESfire RFID modules from company Stronglink enable to use advanced RFID technologies while maintaining a very affordable price.
MIFARE ultralight, MIFARE 1k, MIFARE 4k and MIFARE DESfire are known technologies of RFID enabling to use various application, store various data and other functions. From this reason, they´re largely used in admission systems, loyalty programs, goods tracking and many other segments. From the security point of view, mainly the DESfire system with the DES/AES encryption excels. New 13,56 MHz Stronglink modules in our portfolio – SL025M, SL030, SL031, SL032, SL040 and SL040A enable to use these technologies and they are relatively easily applicable because of more reasons. Firstly, they are available in more versions with UART, I2C, RS232 as well as USB interface, they are certified (CE and RoHS) and the producer provides an above-standard development support.
Usage of modules is also simplified by their low power consumption and a relatively very low-profile construction with the height of only few mm. An important factor – the price, also says in favor of Stronglink modules, because they´re available for relatively very competitive prices. For the development support, there are also available source code examples for various microcontroller families. Further information will provide you the SL025M, SL030, SL031, SL032, SL040 and SL040A user manuals and AN100721, AN101203 and AN110221 application notes.
Stronglink modules will provide you a highly secure RFID - [Link]
Compact RFID modules ID12 and ID20 can be marked by right as simple to use and reliable RFID components working with 125 kHz frequency.
Both types contain an internal antenna, thus eliminating the need of its design, production and tuning of a resonant circuit. Further, modules ID12 and ID20 contain all necessary circuitry, that´s why to produce a working RFID device, it is only necessary to connect these modules to a control unit – most often to a microcontroller. It can be said, that ID12 and ID20 represent a ready-to-use solution for a very affordable price.
If you take a look at the ID12/ID20 application circuit, you´ll find it extremely simple and also the same for both types. The main difference for both types is the range – ID12 has a 12+cm range and ID20 has 16+ cm. Corresponding to their range, has ID12 smaller dimensions and a lower power consumption than ID20.
In case, that you prefer an external antenna, you can use the ID2, module delivered with a wire-wound antenna, which only needs to be suitably placed and connected to the module. For some applications also the version of ID12 with an USB interface can be convenient – ID2-ID12USB, which can be connected directly to a PC. In case, you prefer Mifare RFID (13,56 MHz), you can use the ID20MFIA module.
RFID all inclusive – implement RFID quickly and simply - [Link]
We want to show you how to use the popular Arduino to produce a device capable of recognizing passive transponder (TAG). But this is not the usual RFID key, because the system can activate a relay if a recognised TAG is read, but also we took the opportunity to make an application that use cloud-computing. The basic version, which is a simple key relay consists of an Arduino and the RFID shield based on a ID-12 of Innovations: placing a transponder already learned, the relay is activated. The extended version of our project uses an Arduino, the RFID Shield and the Ethernet Shield with which we can access the Internet and stored, using the Google Docs service, the transponder data.
Arduino RFID shield on the Cloud - [Link]
I wanted to make an easy and secure way to enter my garage. RFID was the best way to unlock my door, even with my hands full I can unlock the door and push it open! I built a simple circuit with a basic ATMega 168 arduino chip and a ID-20 RFID reader to control an electronic door lock.
The circuit consists of 3 separate parts, a Reader to read RFID tags, a Controller to accept data from the reader and control the output of the RGB LED and the Electric door lock. The door lock is first installed in a door and tested with a 9v battery to ensure correct installation. In most cases you want a Normally Open circuit on the door lock, or Fail Secure. This means the door stays locked when no current passes through it. When 12vDC is passed through the electromagnet in the door lock, a plate in the lock gives way and allows the door to be pushed open freely.
Arduino RFID Door Lock - [Link]
Read and write 13.56 MHz RFID cards with OpenPCD:
OpenPCD is a free hardware design for Proximity Coupling Devices (PCD) based on 13,56MHz communication. This device is able to screen informations from Proximity Integrated Circuit Cards (PICC) conforming to vendor-independent standards such as ISO 14443, ISO 15693 as well as proprietary protocols such as Mifare Classic. Contactless cards like these are for example used in the new electronic passports.
Read and write 13.56 MHz RFID cards - [Links]