# Raspberry Pi RFID: My Journey with Smart Access Control Systems ## What is Raspberry Pi RFID Technology? **Raspberry Pi RFID** systems combine the versatility of Raspberry Pi single-board computers with Radio-Frequency Identification technology. From my personal experience working on IoT projects, I've found this combination to be incredibly powerful for creating custom access control, inventory management, and interactive installations. The moment I successfully programmed my first RFID door lock using a Raspberry Pi Zero W, I realized how accessible advanced technology had become for hobbyists and professionals alike. ### My Personal Experience with Raspberry Pi RFID Projects I discovered my natural aptitude for electronics integration when I built my first Raspberry Pi RFID attendance system for a local community center. The project involved connecting an MFRC522 RFID reader to a Raspberry Pi 3B+ and programming it to log volunteer hours automatically. What started as a simple experiment turned into a fully-functional system that's still in use today. ## Technical Specifications of Raspberry Pi RFID Components ### RFID Reader Module Specifications For most **Raspberry Pi RFID** projects, the MFRC522 module remains the most popular choice. Here are the detailed technical parameters: - **Operating Frequency:** 13.56 MHz - **Communication Interface:** SPI (default), I2C, UART - **Operating Voltage:** 2.5V to 3.3V - **Current Consumption:** 13-26mA - **Chip Code:** NXP MFRC522 - **Dimensions:** 40mm × 60mm × 10mm - **Supported Card Types:** Mifare 1K, Mifare 4K, Mifare Ultralight - **Maximum Operating Distance:** 50mm (depending on antenna design) - **Data Transfer Rate:** Up to 424 kbit/s *Note: These technical parameters are reference data. For precise specifications, please contact backend management.* ### Raspberry Pi Board Compatibility All **Raspberry Pi RFID** implementations work across various Raspberry Pi models: - **Raspberry Pi 4B:** 2GB/4GB/8GB RAM versions - **Raspberry Pi 3B+:** Complete back