12V DIY Battery Spot Welder Control Board – High Power Portable Spot Welding Machine for 18650 Lithium Batteries in Pakistan

Overview 

The PN532 NFC Module is one of the most popular 13.56MHz Near Field Communication tools available for makers. Based on the NXP PN532 chip, it’s heavily integrated, reliable, and packs an on-board antenna. Unlike basic RFID readers, the PN532 supports three operating modes: reading/writing smart cards, peer-to-peer communication with other devices, and acting like an NFC tag (card emulation). This makes it the go-to choice for smart locks, digital attendance systems, and phone-interfaced IoT projects.

Key Features 

• Triple Interface Support: Easily switch between I2C, SPI, and High-Speed UART (HSU) using onboard DIP switches.

• Smartphone Compatibility: Can interact directly with NFC-enabled Android or iOS smartphones.

• Built-in Antenna: Large onboard trace antenna gives a reliable reading distance of up to 3cm–5cm without external coils.

• Complete Starter Kit: Usually includes the main module, a 4-pin jumper cable, and a standard Mifare Classic S50 card/key fob.

Technical Specifications 

Feature	Specification
Operating Frequency	13.56 MHz
Operating Voltage	3.3V to 5V DC (On-board level shifting)
Supported Protocols	ISO/IEC 14443 Type A and Type B, FeliCa
Communication Modes	I2C, SPI, UART
Dimensions	43mm x 31mm