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Chess Card

Hung-Chi970104·chess_card

Chess Card PCB layout, top view — open source RP2040/RP2350 board by Hung-Chi970104
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About the Chess Card PCB

Chess Card is an open source RP2040/RP2350 PCB design by Hung-Chi970104, published on GitHub. It is a 2-layer board measuring 55 × 85 mm, with 68 components from 37 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the RT6150BGQW, NT3H2111W0FHKH and W25Q64JVXGIQ. By type, the board carries 28 capacitors, 17 resistors, 7 diodes, 4 ICs, 4 switches and 3 inductors.

It belongs with the displays & leds designs in this gallery.

From the project

Business-card-scale RP2040 and e-paper hardware prototype for a portable chess interface.

After building my Tic-Tac-Toe business card, I decided to build a more advanced version that allows users to play chess, compete online through radio, and even compete against AI!

https://github.com/user-attachments/assets/676e2b21-aca0-44f8-8b26-b48a64608b89

Chess Card, from the project README
From the project README

Main components on the Chess Card

RT6150BGQWNT3H2111W0FHKHW25Q64JVXGIQRP2040

Chess Card bill of materials (BOM)

68 components, 37 distinct parts.

QtyPartRefs
1
RT6150BGQW
U1
1
NT3H2111W0FHKH
U2
1
W25Q64JVXGIQ
U3
1
RP2040
U4
1
SI1308EDL-T1-GE3
Q1
1
12 MHz
Y1
1
USB_C_Receptacle_USB2.0_14P
J1
1
Conn_01x03
J2
1
FPC-05FB-24PH20
FPC1
1
SW_Push
SW1
3
SW_Push
SW2, SW3, SW4
1
LED
D1
3
D
D2, D3, D4
3
LED
D5, D6, D7
1
2u2
L1
1
25X48MM_NFC_ANTENNA
L2
1
68uH
L3
9
0.1uF
C1, C7, C8, C10, C11, C12, C13, C14 +1
1
10uF
C2
1
22uF
C3
Show 17 more
QtyPartRefs
1
220nF
C4
2
15pF
C5, C18
2
1uF
C6, C9
2
4.7uF
C19, C28
9
1uF
C20, C21, C22, C23, C24, C25, C26, C29 +1
1
100nF
C27
1
10K
R1
3
1K
R2, R9, R10
2
100K
R3, R8
2
5.1K
R4, R6
1
1.02M
R5
1
180K
R7
2
27
R11, R12
1
0.47
R13
1
10K
R14
2
100
R15, R16
1
470
R17

Chess Card design files

The KiCad project lives in the Hung-Chi970104/chess_card repository on GitHub; these links point at the commit this page was built from.

Chess Card: common questions

What microcontroller does the Chess Card use?

The Chess Card is built around the RP2040, from the RP2040/RP2350 family.

How big is the Chess Card PCB?

The Chess Card measures 55 × 85 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Chess Card?

68 components, from 37 distinct parts. The full bill of materials is listed on this page.

Where can I download the Chess Card design files?

From the Hung-Chi970104/chess_card repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Chess Card design in my own project?

The repository has no license, so all rights stay with Hung-Chi970104. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Chess Card without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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