HardLabs

CH554 USBQuadMouseKeyboard

PR77·CH554_USBQuadMouseKeyboard·Hardware/USBQuadMouse.kicad_pcb

CH554 USBQuadMouseKeyboard PCB layout, top view — open source WCH CH32/CH55x board by PR77

About the CH554 USBQuadMouseKeyboard PCB

CH554 USBQuadMouseKeyboard is an open source WCH CH32/CH55x PCB design by PR77, published on GitHub under the MIT license. It is a 2-layer board measuring 61.9 × 21.6 mm, with 24 components from 20 distinct parts.

Its main chip is the CH554T, from the WCH CH32/CH55x family. By type, the board carries 5 connectors, 5 resistors, 4 capacitors, 3 switches, 2 jumpers and 2 diodes.

It belongs with the keyboards, retro computing and usb & debug tools designs in this gallery.

From the project

CH554 based USB to Quadrature Mouse and Keyboard Interface

OLED is also supported so you can see some information for example keyboard and mouse report data.

CH554 USBQuadMouseKeyboard, from the project README
From the project README

Main components on the CH554 USBQuadMouseKeyboard

CH554T

CH554 USBQuadMouseKeyboard bill of materials (BOM)

24 components, 20 distinct parts.

QtyPartRefs
1
CH554T
U1
1
IRLML6402
Q1
1
Serial
J2
1
USB_A
J3
1
AmigaMouse
J4
1
AmigaKeyboard
J5
1
OLED
J6
1
Buzzer
BZ1
1
VBUS
JP1
1
5V
JP2
1
SW_BOOT
SW1
1
SW_BOOTLOADER
SW2
1
SW_RESET
SW3
1
SS16
D1
1
LED
D2
4
100N
C2, C3, C4, C5
1
10K
R1
2
10R
R3, R5
1
100K
R6
1
1K
R7

CH554 USBQuadMouseKeyboard design files

The KiCad project lives in the PR77/CH554_USBQuadMouseKeyboard repository on GitHub; these links point at the commit this page was built from.

CH554 USBQuadMouseKeyboard: common questions

What microcontroller does the CH554 USBQuadMouseKeyboard use?

The CH554 USBQuadMouseKeyboard is built around the CH554T, from the WCH CH32/CH55x family.

How big is the CH554 USBQuadMouseKeyboard PCB?

The CH554 USBQuadMouseKeyboard measures 61.9 × 21.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CH554 USBQuadMouseKeyboard?

24 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the CH554 USBQuadMouseKeyboard design files?

From the PR77/CH554_USBQuadMouseKeyboard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the CH554 USBQuadMouseKeyboard design in my own project?

Yes, under the terms of its MIT license, which PR77 chose for the repository.

Can I test firmware for the CH554 USBQuadMouseKeyboard 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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