Product introduction:
The 25KHZ EMID card reader module features small operating current and high stability. It can be used in attendance systems, access control systems, parking management systems, food sales systems, electronic security systems, community management, elevator control, lockers, toys, etc.
The RFID reader module can read 125K EM4100 series (or compatible) RFID cards. The module is very convenient to use, connected to the matching card reader antenna (coil) serial port to connect the single-chip microcomputer, turn on the power. When an RFID card enters the card reading range, the module automatically sends the card number through the serial port (UART), after receiving the MCU Can control the relay to achieve simple access control.
Module size and pinout instructions:
1.GND: power ground
2.VCC: +5V
3.TXD: card number serial output
4.XH: Connect LED
5.LS: Connect the buzzer
6.L1: Receive card antenna
7.L2: Receive card antenna
Parameter:
Power: 3-5V, <25MA
Working frequency: 125KHZ±1KHZ
Card reading distance: <7CM distance is related to card and antenna size
Output mode: serial port TTL-232 level
Card reading method: swipe the card once and output the card number once
Card reading temperature: <100MS
Working temperature: -10~75 degree
Coil inductance: 345uH
Application:
Card reader module can be applied to attendance system, access control system, parking management system, food sales system, electronic anti-theft system, community management, elevator control, lockers, toys, etc.
Note:
1. The power supply should use a line power supply or a switching power supply with low ripple voltage. If the quality of the switching power supply is poor or the ripple is too large, it will affect the card reading distance. L2 is to improve the power quality. For example, the linear power supply and the switching power supply of Wenbo can be omitted. If the ripple affects the card reading distance, please increase the L2 inductance. Reading distance.
2. The card reader antenna can't be close to the metal and change the original shape, otherwise it will affect the card reading distance.
On Nov 26, 2023 at 23:27:08 PST, seller added the following information: