125Khz RFID Mini Module Kits

RFID  frequency identification is a non-contact object recognition technology, it can automatically recognize target and get relevant data through rf signal, so there are so many interactive projects which need to use RFID to achieve object recognition. Generally speaking, one basic kit of RFID general system mainly consists of three parts :
 
Tag : composed by coupling components and chip, every tag have only electronic coding, adhere to the target object identifier.
 
Reader : equipment used to read (sometimes can write) tag information, can be designed for handheld or stationary.
 
Antenna : transmit rf signal between the tag and reader.


125KHz card mini-module is designed for reading code from 125KHz/ 134.2KHz card compatible read-only tags and read/write card . It can be applied in office/home security, personal identification, access control, anti-forgery, interactive toy and production control systems etc.

It is compatible with ID cards of 64 bit read-only EM4100, TK4100, and EM4102 series. This module outputs original card information (Manchester code) and ascii codes which can be directly displayed on the computer. Code form: Manufacturers code + ID card number + parity bits. It can be directly connected to Pin 2 of the computer serial port (COM). Antenna and the module has been adjusted to the best condition, with long reader distance. With CBB capacitors, it has anti-interference to temperature change.


Parameters :

    * Voltage: 3 - 5V DC
    * Current: <50mA
    * Output format: Baud rate 9600, Data bits 8, stop bit 1
    * Manchester code output:
      ___ 1; ____
      | ___; ___ | 0
    * Reading Distance: key card> 5cm, thin card> 9cm, thick card> 11cm, with no blind spots
    * Operation temperature: 0 ~ 70 degrees Celsius
    * Size: 38mm * 20mm

Pin definition :

   1 * VCC: +5 V power supply
   2*  TX: TX output. Baud rate: 9600, Data bits: 8, stop bit: 1
   3*  PC: TX output to computer serial port. Directly connected to Pin2 of the computer COM.
       Note: already embeded with voltage level conversion circuit.
   4 * L2: antenna
   5*  L1: antenna
   6*  GND: GND
   7 * Mcst: Manchester code output
   8 * Rest: reset pin, low effective.
   9 * D1: card available signal. When a card is detected this pin is high. After 6ms, TX outputs  
        data.  Then it becomes low after TX output finished
   10* D2: vacant
   11* D3: vacant

Product list :

   1. RFID reader module x1
   2. Coil antenna x1
   3. Thick ID card x1
   4. Thin ID card x1
   5. Key ID card x1

Sample connection :

 

Click here to get the reference schematic diagram

Click here to get EM4100 Datasheet and Serial port debug software