HardLabs

CH32X-48

rgoulter·keyboard-labs·pcb/keyboard-ch32x-48.kicad_pcb

CH32X-48 PCB layout, top view — open source WCH CH32/CH55x board by rgoulter

About the CH32X-48 PCB

CH32X-48 is an open source WCH CH32/CH55x PCB design by rgoulter, published on GitHub. It is a 2-layer board measuring 224.6 × 74.2 mm, with 112 components from 12 distinct parts.

Its main chip is the CH32X035C8T6, from the WCH CH32/CH55x family. By type, the board carries 5 resistors, 3 connectors, 3 capacitors, 2 switches, 2 diodes and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

Repo with my PCB designs and keyboard firmware

This repository contains the source files for keyboard designs and keyboard firmware.

Plotted gerber files can be found under the GitHub repository's releases.

Assembled PCBs for selected designs are available on the RGoulter's Keyboard Labs store.

- PCB smaller than 100x100 mm2, so that it's cheaper to fabricate at various PCB fabricators. - Reversible PCB (use the same PCB for left/right halves). - Using the WeAct Studio MiniF4 "black pill" dev board, a cheap STM32F4 dev board that runs ARM. - Low profile (PCB + choc switches + bumpons). - Column-staggered arrangement of key switches. -…

CH32X-48, from the project README
From the project README

Main components on the CH32X-48

CH32X035C8T6

CH32X-48 bill of materials (BOM)

112 components, 12 distinct parts.

QtyPartRefs
1
CH32X035C8T6
U1
1
USB Type-C Female 16P
J1
1
Conn_01x02
J2
1
Conn_01x04
J3
48
1N4148
D_1_1, D_1_2, D_1_3, D_1_4, D_1_5, D_1_6, D_1_7, D_1_8 +40
2
SW_SPST
SW1, SW2
48
MX-compatible
SW_1_1, SW_1_2, SW_1_3, SW_1_4, SW_1_5, SW_1_6, SW_1_7, SW_1_8 +40
2
LED
D1, D2
2
100nF
C1, C2
1
4.7uF
C3
3
10k
R1, R4, R5
2
5.1k
R2, R3

CH32X-48 design files

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

CH32X-48: common questions

What microcontroller does the CH32X-48 use?

The CH32X-48 is built around the CH32X035C8T6, from the WCH CH32/CH55x family.

How big is the CH32X-48 PCB?

The CH32X-48 measures 224.6 × 74.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CH32X-48?

112 components, from 12 distinct parts. The full bill of materials is listed on this page.

Where can I download the CH32X-48 design files?

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

Can I use the CH32X-48 design in my own project?

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

Can I test firmware for the CH32X-48 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug WCH CH32/CH55x firmware against it before you order a PCB.

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