• Complete RC522 Mini RFID kit including reader module, S50 white card, blue key fob, and header pins for Arduino projects.
  • Close-up of the black RC522 Mini PCB highlighting the MFRC522 IC chip and high-quality surface-mount components.
  • The underside of the RC522 Mini module showing the integrated 13.56MHz induction coil antenna for contactless reading.
  • Compact RC522 Mini RFID reader module shown with blue proximity key fob and male header pins for easy prototyping.
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RC522 Mini RFID/NFC Reader Writer Module (13.56 MHz) for Arduino

RC522 Mini RFID/NFC Reader Writer Module (13.56 MHz) for Arduino

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HK$29.00
HK$29.00
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Short Product Description

Upgrade your interface with crisp visuals.
This 12864 Graphic LCD Module delivers a sharp 128x64 pixel resolution on a stunning blue backlight with white pixels. Built with the versatile ST7920 controller, it supports both Parallel and SPI Serial modes, allowing you to save precious I/O pins on your Arduino or microcontroller. Perfect for displaying complex graphics, charts, and custom text.

Key Features

  • High-Res Graphic Display: 128x64 dot matrix resolution enables text, images, and graph rendering.
  • Crisp Visibility: Deep blue background with bright white pixels provides excellent contrast and aesthetics.
  • Dual Interface Modes: Supports both 6800 8-bit Parallel and Serial (SPI) modes (Selectable via Pin 15 PSB).
  • Standard 5V Logic: Seamlessly compatible with Arduino UNO, Mega, and other 5V logic controllers.
  • Adjustable Contrast: Dedicated V0 pin allows for precise brightness and contrast tuning via potentiometer.
  • Robust Mounting: Four corner mounting holes (3mm) for secure installation in enclosures.

Full Product Description

Big Performance in a Tiny Footprint: The RC522 Mini

For developers and hobbyists building the next generation of IoT devices or secure access systems, space is often a luxury. The RC522 Mini Version RFID Module solves the bulk issue of traditional readers. Engineered with the robust NXP MFRC522 chip, this module delivers reliable Near Field Communication (NFC) and RFID capabilities in a form factor nearly half the size of standard boards.

 

Seamless Embedded Integration

Whether you are prototyping a smart drawer lock with an Arduino Nano or building a complex attendance system with an STM32, this module is designed for versatility. It operates on the highly stable 13.56MHz band (ISO/IEC 14443A standard), ensuring compatibility with widely available MIFARE Classic 1K cards and tags.

 

Why Choose the Mini Version?

  • Space-Saving Design: At approximately 25mm x 37mm, it fits into enclosures where standard readers cannot.
  • Stable Communication: Utilizing the SPI interface ensures high-speed data transfer (10Mbit/s} max), crucial for quick card scanning and authentication processes.
  • Low Power Consumption: Optimized for battery-operated portable devices, drawing minimal current during standby.

 

Ready for STEM & DIY

At Sun Cheong Computer, we recommend this module for STEM education and DIY electronics. It allows students and makers to understand the fundamentals of Radio Frequency Identification (RFID) through hands-on coding. The kit comes complete with headers, a blank S50 card, and a keychain tag, so you can start coding immediately.

Technical Specifications

  • Model: RC522 Mini (Black Edition)
  • Chipset: NXP MFRC522
  • Operating Frequency: 13.56 MHz
  • Operating Voltage: 3.3 V DC
  • Operating Current: 13–26 mA
  • Idle/Sleep Current: 10–13 mA / <80 μA
  • Interface: SPI (Primary)
  • Supported Card Types: MIFARE S50, MIFARE S70, MIFARE UltraLight, MIFARE Pro
  • Read Range: 0–30 mm (depending on tag size)
  • Dimensions: 37 mm × 25 mm
  • Operating Temp: -20°C to +80°C

Delivery Options

  • Local delivery within Hong Kong and in-store pickup.​
  • Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
  • Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
  • Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
  • In-store pickup details (location and time) will be confirmed by email or phone message.​
  • Delivery times are estimates and may be affected by weather or unforeseen circumstances.​

FAQ Section

Q: Can I use this module directly with a 5V Arduino like the UNO?

A: The signal logic level of the RC522 is 3.3V. While the 3.3V power pin on the Arduino can power it, we highly recommend using a logic level converter (or simple voltage divider resistors) for the signal pins (MOSI, SCK, SS, RST) to prevent damaging the module.

Q: How does this differ from the standard blue RC522 module?

A: Functionally, they are identical and use the same libraries (like the standard MFRC522 Arduino library). The main difference is the physical layout; the Mini version is significantly smaller and optimized for projects with limited physical space.

Q: Can this module read smartphone NFC signals?

A: The RC522 is primarily designed for ISO 14443A tags (like MIFARE cards). While it shares the same frequency as NFC 13.56MHz, peer-to-peer communication with smartphones is complex and often requires more advanced chips (like the PN532). It is best used for reading physical tags.

Target Users / Applications

  • Electronics Hobbyists: For building smart home devices like RFID cabinet locks.
  • STEM Students & Educators: Perfect for learning SPI communication and IoT security basics.
  • Product Prototypers: Engineers needing a small footprint RFID solution for POC (Proof of Concept).
  • Security Integrators: Developing custom access control or attendance logging systems.
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