2 layers30.4 × 12.7 mm
2 layers85 × 100 mm
Buisness card
HexFud/PCB-BuisnessCardI built this electronic badge that can be used for example in hachatons or other IT event if you open the project on KICAD you can also customize the writings.
- Size
- 85 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 71
- Nets
- 43
- Pads
- 197
- Tracks, vias
- 659, 149
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 31 Jul 2026
- Updated
- 10 Sep 2026
Overview
Buisness card is an open-source printed circuit board by HexFud, from the HexFud/PCB-BuisnessCard repository on GitHub. It is a 2-layer board of 85 × 100 mm with 71 parts on 43 nets, routed with 659 tracks and 149 vias.
It is built around the CH552G and NT3H2111W0FHKH. Its parts include 64 diodes, 3 ICs, 2 switches and 1 inductor. It belongs with the 8051 (CH55x, STC, AT89) boards of this library.
Main components
2README
README.mdPCB-Badge
I built this electronic badge that can be used for example in hachatons or other IT event if you open the project on KICAD you can also customize the writings.
How this was made
This project consists only of one PCB 85x100mm and other components like the led matrix controller the microcontoller etc. It also has a NFC tag that can be written with the microcontroller and 2 minigames showed on the 8x8 led matrix on the front.
How to flash the firmware
-
Install Arduino IDE
-
Add the board package going into File -> Preferences and in the additional board URL you paste this https://raw.githubusercontent.com/DeqingSun/ch55xduino/ch55xduino/package_ch55xduino_mcs51_index.json
-
Navigate to Tools -> Board -> Boards Manager search ch55xduino and click install
-
Plug the microcontroller into the pc and select the correct board you are using in my case a CH552
-
You can now flash the firmware
Notes
If you want to bring your own game on the PCB you're welcome! just fork this repository and then if i'll like your work i am going to mention you guys in the original code. Unfortunatley we only have 2 buttons but in the future I can design another PCB with more functions
AI decleration
Ai helped me to build the part of the firmware that controls the LED matrix
Parts
71| Qty | Value | Footprint | References |
|---|---|---|---|
| 64 | LED | LED_SMD:LED_1206_3216Metric | D100, D101, D102, D103, D104, D105, D106, D107, D108, D109, D110, D111, D112, D113, D114, D115 +48 |
| 2 | SW_Push | Button_Switch_THT:SW_TH_Tactile_Omron_B3F-102x | SW1, SW2 |
| 1 | Battery_Cell | Battery:BatteryHolder_Keystone_103_1x20mm | BT1 |
| 1 | CH552G | gygy:CH552G | U3 |
| 1 | IS31FL3731-QF | Package_DFN_QFN:QFN-28-1EP_4x4mm_P0.4mm_EP2.3x2.3mm | U1 |
| 1 | L | PCB Coils:COIL_GENERATOR | L1 |
| 1 | NT3H2111W0FHKH | gyygg:QFN8P50_160X160X50L40X20N | U2 |
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Questions
How big is the Buisness card PCB?
It measures 85 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Buisness card use?
71 parts, built around the CH552G and NT3H2111W0FHKH. 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 Buisness card KiCad files?
From the HexFud/PCB-BuisnessCard repository on GitHub, at the commit this page was made from: the board is PCB_Schemaric-KICAD/Buisness card.kicad_pcb and its schematic PCB_Schemaric-KICAD/Buisness card.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Buisness card design in my own project?
Its repository states no licence, so its author keeps all rights: ask HexFud before reusing the design.