From cf3be4947dffd4d23d326578c8115647c74670c8 Mon Sep 17 00:00:00 2001
From: RubenSchoonbaert <121669330+RubenSchoonbaert@users.noreply.github.com>
Date: Sat, 21 Dec 2024 18:52:37 +0100
Subject: [PATCH] Update README.md

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 ![IMG_20240116_194437709](https://github.com/user-attachments/assets/b20db4b7-7c62-4658-ac37-d2e379cdeea6)
 
-RFID-Transponder
+Overview
+
+This project is a compact and versatile PCB design featuring an RFID/NFC tag IC. It includes components for writing and managing data on the RFID tag, modern power input options, and flexible microcontroller integration.
+Key Features
+
+    RFID/NFC Tag Functionality
+        Built-in RFID coil, designed using eDesignSuite by ST-Engineering.
+        Integrated with the ST25DV04KC RFID/NFC Tag IC, offering:
+            16 KB EEPROM for data storage.
+            Communication via the I2C bus.
+        Data can be written to the tag using external devices, such as smartphones with RFID capabilities.
+
+    Data Storage Support
+        Includes a Micro SD card slot for additional data storage.
+        Utilizes a 74LVC125 IC for safe voltage level shifting between the 5V logic of the microcontroller and the 3.3V logic of the Micro SD card.
+
+    Power Input
+        Powered via a USB-C port delivering 5V.
+        Configured with 1 kΩ resistors on the CC pins to ensure USB-C standard compliance.
+
+    Flexible Microcontroller Integration
+        Designed around the AtmegaXX08 series of microcontrollers, specifically the Atmega3208.
+        Compatible with other ICs in the same series and package.
+
+    Connectivity
+        Provides connectors for UPDI and UART for programming and debugging.
+        Optional GPIO breakout for additional interfacing needs.
+
+Applications
+
+    Use as an RFID/NFC tag in systems requiring dynamic, writable RFID data storage.
+    Embedded designs requiring compact, integrated EEPROM and I2C functionality.
+    Systems needing programmable and customizable tag IC solutions.