Designed in
cooperation with Grand Idea Studio, the Parallax Radio Frequency Identification
(RFID) Reader Module is the first low-cost solution to read passive RFID
transponder tags. The RFID Reader Module can be used in a wide variety of
hobbyist and commercial applications, including access control, automatic
identification, robotics, navigation, inventory tracking, payment systems, and
car immobilization.
This reader is compatible with
EM4102 RFID
tags (125 kHz). The read range varies between 0.5" and 6" depending on
the size of the tag's antenna.
This kit includes the Parallax
RFID Reader, plus an assortment of EM4102 tags:
(1) Credit Card Thin Card (ISO)
(1) Thick Card (Clamshell)
(1) Inventory Label - Square Version (2 1/8 x 3 3/8)
(1) Small Glass Ampoule
(1) 20mm Button with Sticker Backing
(1) 17mm Black Pill Tag
(1) 35mm White Disk with Hole
(1) CD-ROM Tag
(1) 30mm Global Tag (black)
(1) 25mm White Disk
(1) 25mm White Disk (sticker backing)
(1) 30mm Clear Thin Lamination Disk
(1) 30mm Clear Thin Lamination Disk (sticker backing)
(1) 25mm Clear Thin Lamination Disc
(1) Blue Key Fob
(1) Wristband Watch Style
** Tags might change depending on availability, but will be
similar in type.
This device can be connected to a PC serial port using a MAX232 line driver. The
circuit isn't supported by Parallax, but it's possible to make this connection
with a few dollars of parts.
Features:
- Fully-integrated, low-cost method of reading passive RFID transponder
tags
- 2400 baud TTL serial interface (output only) to PC, BASIC Stamp module
and other processors
- Requires single +5VDC supply
- Bi-color LED for visual indication of activity
- 0.1" pin spacing for easy prototyping and integration
| Pin |
Pin Name |
Type |
Function |
| 1 |
VCC |
P |
System power, +5V DC input. |
| 2 |
/ENABLE |
I |
Module enable pin. Active LOW digital input. Bring this pin LOW to
enable the RFID reader and activate the antenna. |
| 3 |
SOUT |
O |
Serial Out. TTL-level interface, 2400bps, 8 data bits, no parity, 1
stop bit. |
| 4 |
GND |
G |
System ground. Connect to power supply’s ground (GND) terminal. |
| Note: Type: I = Input, O = Output, P = Power, G = Ground |
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