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Power-free-NFC-Tag-Emulator

A True NFC Tag Emulator

mcuerMCUer
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NFC Tag-Emulator: Power-Free Operation Sets New Standard

Existing NFC tag emulators like Flipper Zero, ChameleonUltra/Mini, Amiibo Emulator, PN532Killer, and Proxmark3 rely on USB or battery power, limiting their portability and usability. In contrast, the Tag-Emulator draws power directly from the NFC reader's field—just like a passive RFID tag—enabling seamless integration with standard NFC infrastructure.

Leveraging the ultra-low-power CW32L010 MCU (3.5mA @ 27.12MHz), this design operates within the 4.5mA power budget supplied by typical NFC readers (3.3V/15mW). The emulator currently supports ISO/IEC 15693 and 14443A emulation with full compatibility for read/write operations.

This breakthrough enables applications requiring true RFID tag behavior, such as access control systems, ticketing, and industrial automation, without external power dependencies. The design demonstrates that passive NFC emulation is feasible even with feature-rich MCUs, opening new possibilities for stealthy, maintenance-free IoT nodes and security research tools.

TagEmulator-20250913.hex

The first firmware version for emulate Ntag21x and ISO15693 tags.

hex - 474.04 kB - 09/20/2025 at 04:20

Download

Tag-Emulator-V1.2-20250806-JLCPCB.ZIP

V1.2 Gerber Files

x-zip-compressed - 65.91 kB - 08/30/2025 at 06:56

Download

Tag-Emulator-V1.2-20250806_BOM.pdf

V1.2 BOM

Adobe Portable Document Format - 34.34 kB - 08/30/2025 at 06:55

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MCUer wrote 08/30/2025 at 06:29 • point

I have uploaded the Gerber files and BOM to GitHub.

  Are you sure? yes | no

Justin wrote 08/29/2025 at 19:20 • point

Hey I don't know if you're still working on this or not but could you realease whatever design files you have? either on your github for this project or here cause I think your work could be extremely useful to a project I've been considering next.

  Are you sure? yes | no

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