125KHz Writable Re-Writable Transparent Coin-Size RFID Tag for Key Fobs and Access Control

Description

What it is

The 125Khz EM4305 transparent RFID coil is a proximity detection component used for access control and object management. This RFID tag is writable and re-writable, allowing for greater flexibility in its use.

Features

• Operating frequency: 125Khz
• Compatible with the EM4305 chip
• Copper coil on transparent paper
• Usable as an access control tag
• Writable and re-writable

What it is for

This RFID tag can be used to create access control systems for doors or lockers, where the tag is detected to unlock access. It is ideal for Arduino projects and general electronics, offering a simple and flexible solution for beginners and makers.

Tutorial: How to use 125Khz EM4305 RFID Coil

The EM4305 125Khz RFID coil is a very useful component for access control and object monitoring projects. Ideal for beginners and makers who want to start working with RFID without complications.

What you need

• Arduino Uno
• RFID Antenna
• Jumper Wire
• RFID Software

Steps

1. Connect the RFID antenna to the Arduino following the documentation
2. Download and install the necessary RFID software
3. Program the Arduino to read RFID tags
4. Configure the RFID tag to store a unique identifier
5. Test the system by placing the RFID tag near the antenna

Example code

/* Codice di esempio per leggere i tag RFID con Arduino */
#include <MFRC522.h>

#define SS_PIN 10
#define RST_PIN 9
MFRC522 mfrc522(SS_PIN, RST_PIN); // Instanzia l'oggetto RFID

void setup() {
  Serial.begin(9600);
  mfrc522.PCD_Init();
}

void loop() {
  if ( ! mfrc522.PICC_IsNewCardPresent())
    return;
  if ( ! mfrc522.PICC_ReadCardSerial())
    return;
  Serial.print("UID tag:");
  printHex(mfrc522.uid.uidByte, mfrc522.uid.size);
  Serial.println();
  mfrc522.PICC_HaltA();
  mfrc522.PCD_StopCrypto1();
}

Mini project

Create an access system for a door or drawer, using the RFID tag to unlock access when detected.

Common mistakes

• Incorrectly setting up the RFID antenna
• Failing to properly configure the RFID tag
• Using incompatible RFID software
• Failing to verify the connection between Arduino and antenna

Recommended accessories

• RFID Antenna
• Jumper Wire
• RFID Software
• Arduino Uno

Frequently asked questions

How can I customize the RFID tag?
Check the datasheet for customization instructions.

What is the detection range of the RFID tag?
Check the datasheet for the maximum detection range.

Can I use this RFID tag with other microcontrollers?
Yes, but an adapter or specific software might be required.