4 layers28 × 45 mm SmartCard, the printed circuit board in 3D

SmartCard

The goal of this project was to create a small and slim Bluetooth tracker that would fit into a credit card enclosure. To do this, a 0.8mm thin 80mah battery was used along with a 0.8mm PCB.

Open in PCBKit

Size: 28 × 45 mm
Copper layers: 4
Thickness: 1.61 mm
Parts: 71
Nets: 75
Pads: 258
Tracks, vias: 220, 198
Pours: 38
Routed: Yes
KiCad: KiCad 10.0 (file 20260206)
Created: 20 Apr 2026
Updated: 19 Oct 2026

Overview

SmartCard is an open-source printed circuit board by dac63701, from the dac63701/SmartCard repository on GitHub. It is a 4-layer board of 28 × 45 mm with 71 parts on 75 nets, routed with 220 tracks and 198 vias.

It is built around the NRF54L15-QFAA-R, BQ51013BRHLR and WR444030-16F3-G, with the TPS62840YBGR, BQ25100YFPR and BQ298009RUGR among its other parts. Its parts include 38 capacitors, 12 resistors, 7 inductors, 5 ICs and 2 crystals. It belongs with the nRF52 and nRF5x boards of this library.

Main components

README

README.md

Smart Card

A nRF54L15 based Bluetooth Tracker in a Credit Card sized package

Smart Card PCBA

The goal of this project was to create a small and slim Bluetooth tracker that would fit into a credit card enclosure. To do this, a 0.8mm thin 80mah battery was used along with a 0.8mm PCB. The device makes use of wireless charging with a BQ51013B so that it is easy to use and keep charged. There is also a custom battery charger and protection circuit. It uses a BQ298009 for protection and a BQ25100 for charging. Finally there is a TPS62840 for sourcing 1v8 from the battery and the antenna along with a matching network.

Components

Check the bom for more details on the PCB components. Standard PLA was used for the Prototype case. The battery is a 084545 battery from Alibaba.

Case Files

Check OnShape for the files.

Parts

Qty	Value	Footprint	References
8	0.1uF	Capacitor_SMD:C_0402_1005Metric	C16, C19, C20, C21, C22, C24, C27, C32
4	10uF	Capacitor_SMD:C_0603_1608Metric	C17, C18, C26, C39
4	8pF	Capacitor_SMD:C_0402_1005Metric	C23, C25, C28, C29
3	10nF	Capacitor_SMD:C_0402_1005Metric	C2, C9, C10
2	1.5pF	Capacitor_SMD:C_0201_0603Metric	C31, C36
2	2.2uF	Capacitor_SMD:C_0402_1005Metric	C1, C3
2	22nF	Capacitor_SMD:C_0402_1005Metric	C8, C11
2	3.5nH	Inductor_SMD:L_0201_0603Metric	L4, L5
2	470nF	Capacitor_SMD:C_0402_1005Metric	C12, C13
1	0.3pF	Capacitor_SMD:C_0201_0603Metric	C35
1	100m	Resistor_SMD:R_0805_2012Metric	R10
1	100nF	Capacitor_SMD:C_0603_1608Metric	C6
1	100pF	Capacitor_SMD:C_0603_1608Metric	C7
1	10k	Resistor_SMD:R_0402_1005Metric	R5
1	10nF	Capacitor_SMD:C_0603_1608Metric	C5
1	120	Inductor_SMD:L_0402_1005Metric	FB1
1	196	Resistor_SMD:R_0402_1005Metric	R2
1	1V8	TestPoint:TestPoint_Pad_2.0x2.0mm	TP2
1	1k	Resistor_SMD:R_0402_1005Metric	R4
1	1nF	Capacitor_SMD:C_0603_1608Metric	C14
1	1uF	Capacitor_SMD:C_0603_1608Metric	C30
1	2.0pF	Capacitor_SMD:C_0201_0603Metric	C33
1	2.2nF	Capacitor_SMD:C_0402_1005Metric	C4
1	2.2uH	Inductor_SMD:L_0603_1608Metric	L7
1	2.7nH	Inductor_SMD:L_0201_0603Metric	L3
1	20	Resistor_SMD:R_0402_1005Metric	R11
1	20k	Resistor_SMD:R_0402_1005Metric	R3
1	2k	Resistor_SMD:R_0402_1005Metric	R13
1	3.4k	Resistor_SMD:R_0402_1005Metric	R6
1	3.9nH	Inductor_SMD:L_0201_0603Metric	L6
1	3.9pF	Capacitor_SMD:C_0402_1005Metric	C15
1	300	Resistor_SMD:R_0402_1005Metric	R9
1	32MHz	SamacSys_Parts:ABM11W300000MHZ4B1UT3	Y1
1	4.7uF	Capacitor_SMD:C_0603_1608Metric	C34
1	4.7uH	Inductor_SMD:L_0603_1608Metric	L1
1	6.04k	Resistor_SMD:R_0402_1005Metric	R7
1	6.34k	Resistor_SMD:R_0402_1005Metric	R1
1	7.5k	Resistor_SMD:R_0402_1005Metric	R8
1	AMCA31-2R450G-S1F-T3	SamacSys_Parts:XDCR_AMCA31-2R450G-S1F-T3	E1
1	BQ25100YFPR	SamacSys_Parts:BGA6C40P2X3_88X158X50	IC2
1	BQ298009RUGR	SamacSys_Parts:BQ298009RUGR	IC3
1	BQ51013BRHLR	Package_DFN_QFN:Texas_VQFN-RHL-20	IC1
1	Conn_01x05	Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical	J1
1	DNP	Capacitor_SMD:C_0201_0603Metric	C38
1	ECS-.327-7-12-TR	SamacSys_Parts:ECS327712TR	Y2
1	EFC3J018NUZTDG	SamacSys_Parts:EFC3J018NUZTDG	Q1
1	NRF54L15-QFAA-R	SamacSys_Parts:QFN40P600X600X90-49N	U1
1	RX COIL	Inductor_SMD:L_1812_4532Metric_Pad1.30x3.40mm_HandSolder	L2
1	TPS62840YBGR	SamacSys_Parts:TPS62840YBGR	U2
1	VBUS	TestPoint:TestPoint_Pad_2.0x2.0mm	TP5
1	VDD	TestPoint:TestPoint_Pad_2.0x2.0mm	TP4

Questions

How big is the SmartCard PCB?

It measures 28 × 45 mm and has 4 copper layers, 1.61 mm thick.

What parts does the SmartCard use?

71 parts, built around the NRF54L15-QFAA-R, BQ51013BRHLR, WR444030-16F3-G and TPS62840YBGR. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the SmartCard KiCad files?

From the dac63701/SmartCard repository on GitHub, at the commit this page was made from: the board is SmartCard.kicad_pcb and its schematic SmartCard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the SmartCard design in my own project?

Its repository states no licence, so its author keeps all rights: ask dac63701 before reusing the design.

Category and platform

nRF52 and nRF5x

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/dac63701-smartcard" title="SmartCard in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/dac63701-smartcard.jpg" alt="SmartCard" width="1200" height="900">

A picture that opens the board, for a README

[![SmartCard](https://pcbkit.io/embed/boards/dac63701-smartcard.jpg?size=s)](https://pcbkit.io/boards/dac63701-smartcard)

Source

Repository: dac63701/SmartCard
Board file: SmartCard.kicad_pcb
Commit: 07cca17
Licence: Not stated

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