Electricity without cables, i.e. power supply "from the air" - RFID CHIP
The most important, undeniable advantage of RFID technology is the ability to work without separate power sources for both communicating devices (i.e. RFID tags and readers) using radio waves. Although, of course, some devices (e.g. mobile) support RFID technology and have their own power supply, in the case of tags, the energy necessary to activate a small electronic system is transmitted by the same electromagnetic field that ensures proper data transmission between both devices. In other words, the RFID (radio-frequency identification) system, or more precisely, the magnetic field generated by the module's antenna (i.e. a special coil), induces a small current in the tag coil, which is enough to activate the system, decode the signal from the transmitter and send a short responses back to the sender (usually the message is an identifier, which - roughly speaking - is a unique string of characters assigned to a specific tag). RFID (radio frequency identification) systems are characterized by universal applications. They are mostly used as access control.
RFID CHIP - Standards, RFID standards…
Many years ago, the world of RFID devices was divided into two main groups, differing in operating frequency and detection range. The first one operates at a radio signal frequency of 125 kHz, while the second one - intended mainly for proximity devices, i.e. with a range usually of several centimeters - operates in a band several dozen times higher (13.56 MHz). A different frequency forces not only differences in the design of RFID modules (RFID readers), but also in the size of the antenna itself - in the case of lower frequencies, slightly larger antennas are used, although the form itself (flat air coil) remains the same.
RFID technology - additional information
It is worth knowing that popular RFID tags come in various forms, depending on the target application. Self-adhesive "lozenges" are perfect for marking larger objects, while very small objects can be marked with capsule tags, resembling a slightly enlarged grain of rice with a diameter of about 2 mm and a length of just over 12 mm. Implementing RFID is not expensive, which is why this technology is so popular. Properly functioning RFID system
RFID modules and tags as well as an NFC reader in the Botland offer
In this category, we have collected a number of practical RFID modules and tags that work in both standards described above. If you need a module to read 13.56 MHz tags, we especially recommend the Adafruit PN532 module with a built-in PCB antenna and the smaller SM130 Mifare module with UART and I2C interfaces, equipped with two rows of goldpins. The well-known and popular RC522 system, which is the heart of the inexpensive and very easy-to-implement ME138 module, will be perfect for basic applications. To support 125kHz tags, we recommend the miniature ID-12LA RFID modules from SparkFun and communication modules for the ID-2, ID-3, ID-12 and ID-20 series systems. Our offer includes, of course, a wide selection of RFID tags in the form of key rings, cards and capsules. RFID tags available in our store are characterized by increased resistance to mechanical damage. In practice, this means long service life and failure-free operation.
RFID modules and tags - FAQ
