HardLabs

Adapter

yangxing844·keyboard·charybdis/Bastardkb Elite-C-holder master adapter/adapter.kicad_pcb

Adapter PCB layout, top view — open source RP2040/RP2350 board by yangxing844
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About the Adapter PCB

Adapter is an open source RP2040/RP2350 PCB design by yangxing844, published on GitHub. It is a 2-layer board measuring 85.4 × 50.8 mm, with 29 components from 18 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the NCP1117LPST33T3G. By type, the board carries 14 connectors, 6 resistors, 4 switches, 2 ICs and 2 jumpers.

It belongs with the keyboards designs in this gallery.

From the project

this stores some of my files for keyboards building

Main components on the Adapter

RP2040NCP1117LPST33T3G

Adapter bill of materials (BOM)

29 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2040
eliteC
U1
1
NCP1117LPST33T3G
eliteC
U2
1
TYPE-C-31-M-13C
Serial
J1
1
ST-0277D00-052-142
Serial
J2
2
battery charge
J3, J6
2
RGB
J4, J5
2
trackball
J7, J8
2
Ribbon
J9, J11
2
Ribbon
J10, J12
2
serial
J13, J14
2
Jumper_2_Open
JP1, JP2
1
Val**
RSW1
2
C5156480
SW_SPST
SW1, SW2
2
C5156480
SW_SPDT
SW3, SW4
1
5.1K
5.1k
R1
1
5.1K
4.7k
R2
3
5.1k
R3, R5, R6
1
4.7k
R4

Adapter design files

The KiCad project lives in the yangxing844/keyboard repository on GitHub; these links point at the commit this page was built from.

Adapter: common questions

What microcontroller does the Adapter use?

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

How big is the Adapter PCB?

The Adapter measures 85.4 × 50.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Adapter?

29 components, from 18 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 Adapter design files?

From the yangxing844/keyboard 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 Adapter design in my own project?

The repository has no license, so all rights stay with yangxing844. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Adapter 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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