# Placa com NFC ## What is an NFC Board? A **Placa com NFC** is an electronic circuit board that integrates Near Field Communication (NFC) technology. It allows devices to communicate wirelessly over very short distances (typically less than 4 cm). These boards are fundamental components for building systems that require secure, short-range data exchange, such as access control, payment terminals, inventory management, and interactive marketing solutions. From my personal experience working on IoT projects, integrating an **NFC board** was a game-changer for a smart locker system I developed. It simplified user authentication immensely compared to older Bluetooth modules. My skill in embedded C programming was crucial in writing the firmware that managed the data exchange protocol efficiently. In my opinion, the true power of a **Placa com NFC** lies in its combination of convenience and security. The requirement for physical proximity makes unintended data interception very difficult. ## Technical Specifications and Parameters of a Typical NFC Board Here are the detailed technical specifications for a representative **NFC board** module. *Please note: These technical parameters are for reference data only. For exact specifications, you need to contact backend management.* * **Core NFC Chip:** NXP PN532 * **Chipset Code:** PN532UART * **Supported Protocols:** ISO/IEC 14443 Type A & B, FeliCa (JIS X 6319-4) * **Communication Interface:** UART (TTL, 3.3V), I2C, SPI (selectable via jumpers) * **Operating Frequency:** 13.56 MHz * **Effective Reading Distance:** 0 ~ 5 cm (dependent on antenna design and tag type) * **Power Supply:** 3.3V DC * **Current Consumption:** * Standby: < 80 µA * Write Mode: ~ 120 mA * Read Mode: ~ 100 mA * **Board Dimensions:** 40mm (L) x 60mm (W) x 10mm (H) * **Antenna:** Integrated PCB antenna with a standard 3-pin connector for external antenna extension. * **Data Transfer Rate:** Up to 424 kbit/s ## Fun and Practical Application Cases ### Entertainment Application A popular entertainment use for a **Placa com NFC** is in interactive board games. Game pieces or cards can be embedded with NFC tags. When a player places a piece on a board that contains the NFC reader board, the game console instantly identifies the piece and triggers audio effects, video clips, or updates the game state on a connected screen, creating a dynamic "phygital" (physical+digital) experience. ### Application Supporting Charitable Causes Charities have innovativ