Mikroelektronika MikroE Development Kits MIKROE-262 Hoja De Datos
Los códigos de productos
MIKROE-262
RFid Reader
MikroElektronika
RFid Reader
The RFid Reader additional board is used to read identification cards (RFid Cards) using radio waves.This additional board features
a receiver/transmitter module with antenna and a 2x5 male connector that enables connection with development systems. The
operation of the RFid Reader board is based on amplitude modulation of radio waves and electromagnetic induction. The RFid card
is not provided with the RFid Reader, but you can buy it separately.
Figure 1: RFid Reader
Figure 2: Identification card (RFid Card)
Antenna provided on the
additional board is used to
receive data stored on the
identification card (RFid Card)
2x5 male connector enables the
additional board to be connected
to a microcontroller on the
development system
Transceiver EM4095 is used for
AM modulation/demodulation or
as a driver for the antenna
RFid Reader is powered via a development system it is connected to. The presence of the power supply is indicated by a LED marked
POWER. When the RFid Reader is turned on, a 125kHz voltage is supplied on its antenna. As a result, the anntena starts emitting
an electromagnetic field necessary for reading the RFid identification card. As passive RFid card doesn’t have its own power supply,
it features a coil where the voltage is automatically induced by approaching the card to the RFid Reader’s antenna. This voltage is
necessary for the chip featured on the RFid card to work. The memory chip on the RFid card contains a unique identification code.
This code is sent by the card when it is placed close to the RFid Reader’s anntena. The code is received via this anntena. Then, it is
sent to the microcontroller for further processing.
Figure 3: The principle of RFid Reader’s operation