HardLabs

CH552-48

rgoulter·keyboard-labs·pcb/keyboard-ch552-48.kicad_pcb

CH552-48 PCB layout, top view — open source WCH CH32/CH55x board by rgoulter
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About the CH552-48 PCB

CH552-48 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 107 components from 9 distinct parts.

Its main chip is the WeAct_CH552CoreBoard, from the WCH CH32/CH55x family. By type, the board carries 4 resistors, 3 capacitors, 2 switches, 1 IC and 1 connector.

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. -…

CH552-48, from the project README
From the project README

Main components on the CH552-48

WeAct_CH552CoreBoard

CH552-48 bill of materials (BOM)

107 components, 9 distinct parts.

QtyPartRefs
1
WeAct_CH552CoreBoard
U1
1
USB Type-C Female 16P
J1
48
1N4148
D_1_1, D_1_2, D_1_3, D_1_4, D_1_5, D_1_6, D_1_7, D_2_1 +40
2
SW_SPST
SW1, SW2
48
MX-compatible or Kailh Choc v1
SW_1_1, SW_1_2, SW_1_3, SW_1_4, SW_1_5, SW_1_6, SW_1_7, SW_2_1 +40
3
100nF
C1, C2, C3
1
330R
R1
1
10k
R2
2
5.1k
R3, R4

CH552-48 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.

CH552-48: common questions

What microcontroller does the CH552-48 use?

The CH552-48 is built around the WeAct_CH552CoreBoard, from the WCH CH32/CH55x family.

How big is the CH552-48 PCB?

The CH552-48 measures 224.6 × 74.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CH552-48?

107 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the CH552-48 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 CH552-48 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 CH552-48 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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