4 layers39.1 × 94.5 mm
2 layers88.9 × 50.8 mm
Business Card
DragonflyValkyrie/PCB-Business-Card1- Size
- 88.9 × 50.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 71
- Nets
- 32
- Pads
- 262
- Tracks, vias
- 800, 52
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 29 Feb 2024
- Updated
- 8 May 2026
Overview
Business Card is an open-source printed circuit board by DragonflyValkyrie, from the DragonflyValkyrie/PCB-Business-Card repository on GitHub, published under the MIT licence. It is a 2-layer board of 88.9 × 50.8 mm with 71 parts on 32 nets, routed with 800 tracks and 52 vias.
It is built around the ATTINY1616-MN, NT3H2111W0FHKH and TL3315NF100Q, with the AO3401A among its other parts. Its parts include 42 diodes, 4 resistors, 4 switches, 3 capacitors and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
4
ATTINY1616-MN
QFN-20-EP(3x3)-40℃~+105℃ 1.8V~5.5V 10bit 16KB 18 20MHz 256Byte 2KB 8 Bit 8bit AVR Built-in FLASH QFN-20-EP(3x3) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
NT3H2111W0FHKH
XQFN-8(1.6x1.6)RFID ICsNXP Semiconductors
TL3315NF100Q
SMD-4P,4.5x4.5mm-20℃~+70℃ 0.55mm 15V 1N 4.5mm 4.5mm 50mA Gull Wing Round Button SPST Surface Mount,Vertical SMD-4P,4.5x4.5mm Tactile Switches ROHSE-SwitchTactile Switches
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
README
README.mdPCB Business Card
Schematics
PCB Desgin
Features:
- NFC functions: Tap your phone on the card to my GitHub.
- GitHub QR Code: Don't want to tap? Scan it! Dive into my GitHub.
- Power Wheel Formula: Quick power calculations. Because who doesn't need a handy formula?
- Ruler: Inches or centimeters, not just a paperweight or a game card. Inspired by Anthony Kouttron’s genius
- Snake Game: Play Snake on LEDs, a nod to Ryan Chen's Tic-Tac-Toe masterpiece. Classic gaming meets the business card – why not?
- Power Source: Powered by a sneaky CR2032 coin battery, borrowed from Brian McEvoy's idea.
Inspirations:
- Anthony Kouttron's Ruler and Design: (Read more here) - Because sometimes you just need to measure things on the fly.
- Ryan Chen's Tic-Tac-Toe Challenge: (Explore more here) - I turned tic-tac-toe into Snake – A different approach to pass the time.
- Brian McEvoy's Literally Flashy Business Cards: (See the blink here) - When your business card needs to leave an impression and be thin.
Design Choices
NFC Design
QR Code
Components
Snake Game
Bill of Materials (BOM)
Parts
71| Qty | Value | Footprint | References |
|---|---|---|---|
| 42 | ~ | Library:XL-1615SURSYGC_LED | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +26 |
| 4 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4 |
| 4 | TL3315NF100Q | TL3315NF100Q:SW_TL3315NF100Q | S1, S2, S3, S4 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 220nf | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 47u | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | ATtiny1616-M | Package_DFN_QFN:VQFN-20-1EP_3x3mm_P0.4mm_EP1.7x1.7mm | U1 |
| 1 | Battery_Cell | Library:Coin_Cell | BT1 |
| 1 | LED_0201_0603Metric | LED_SMD:LED_0201_0603Metric | 0201 (0603) |
| 1 | LED_0402_1005Metric | LED_SMD:LED_0402_1005Metric | 0402 (1005) |
| 1 | LED_0603_1608Metric | LED_SMD:LED_0603_1608Metric | 0603 (1608) |
| 1 | LED_0805_2012Metric | LED_SMD:LED_0805_2012Metric | 0805 (2012) |
| 1 | LED_1206_3216Metric | LED_SMD:LED_1206_3216Metric | 1206 (3216) |
| 1 | LED_1210_3225Metric | LED_SMD:LED_1210_3225Metric | 1210 (3225) |
| 1 | LED_1806_4516Metric | LED_SMD:LED_1806_4516Metric | 1806 (4516) |
| 1 | LED_1812_4532Metric | LED_SMD:LED_1812_4532Metric | 1812 (4532) |
| 1 | LED_2010_5025Metric | LED_SMD:LED_2010_5025Metric | 2010 (5025) |
| 1 | LED_2512_6332Metric | LED_SMD:LED_2512_6332Metric | 2512 (6332) |
| 1 | LOGO | Library:QR_Code | G*** |
| 1 | LOGO | Library:Power_Wheel | G*** |
| 1 | NT3H2111W0FHKH | NT3H2111W0FHKH:QFN8P50_160X160X50L40X20N | U2 |
| 1 | ~ | Library:Progam_Pad | J1 |
| 1 | ~ | FQV3JXVJRBBMXRR:25X48MM_NFC_ANTENNA | ANT1 |
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Questions
How big is the Business Card PCB?
It measures 88.9 × 50.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Business Card use?
71 parts, built around the ATTINY1616-MN, NT3H2111W0FHKH, TL3315NF100Q and AO3401A. 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 Business Card KiCad files?
From the DragonflyValkyrie/PCB-Business-Card repository on GitHub, at the commit this page was made from: the board is Business Card.kicad_pcb and its schematic Business Card.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Business Card design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).