HardLabs

Nfc card

SidhantEE·nfc-card·kicad/nfc-card.kicad_pcb

Nfc card PCB layout, top view — open source board by SidhantEE

About the Nfc card PCB

Nfc card is an open source PCB design by SidhantEE, published on GitHub under the MIT license. It is a 2-layer board measuring 85.6 × 54 mm, with 6 components from 6 distinct parts.

Other key parts include the NT3H2111. By type, the board carries 2 capacitors, 1 IC, 1 diode, 1 inductor and 1 resistor.

It belongs with the rf & radio designs in this gallery.

From the project

PCB business card: passive NFC tag that opens a URL and lights an LED off the phone's field. KiCad 10, fab files, antenna maths.

A PCB business card the size of a debit card. Tap it with a phone and it opens a URL and lights an LED off the phone's own field. No battery, no microcontroller: four fitted parts, a PCB coil, and an optional tuning capacitor. Everything needed to order and build another batch is in this repo.

Designed in KiCad 10. Five boards were fabricated by JLCPCB in September 2026: black soldermask, white silkscreen, ENIG, 0.8 mm. The exact Gerber set that was uploaded is output/fab/ (also zipped as output/NFCFab.zip`). The writeup on the antenna maths is at sidhantgurung.me.

Nfc card, from the project README
From the project README

Main components on the Nfc card

NT3H2111

Nfc card bill of materials (BOM)

6 components, 6 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
NT3H2111
U1
1
LED
D1
1
2.44uH_est
L1
1
220nF
C1
1
DNP_C0G_TUNE
C2
1
47
R1

Nfc card design files

The KiCad project lives in the SidhantEE/nfc-card repository on GitHub; these links point at the commit this page was built from.

Nfc card: common questions

How big is the Nfc card PCB?

The Nfc card measures 85.6 × 54 mm, has 2 copper layers and is 0.8 mm thick.

How many components are on the Nfc card?

6 components, from 6 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Nfc card design files?

From the SidhantEE/nfc-card repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Nfc card design in my own project?

Yes, under the terms of its MIT license, which SidhantEE chose for the repository.

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