HardLabs

Mini devboard

FraI3mega·mini-devboard·PCB/mini-devboard.kicad_pcb

Mini devboard PCB layout, top view — open source WCH CH32/CH55x board by FraI3mega

About the Mini devboard PCB

Mini devboard is an open source WCH CH32/CH55x PCB design by FraI3mega, published on GitHub under the CERN-OHL-W-2.0 license. It is a 2-layer board measuring 19 × 56.4 mm, with 14 components from 9 distinct parts.

Its main chip is the CH552G, from the WCH CH32/CH55x family. By type, the board carries 5 resistors, 3 capacitors, 2 connectors, 2 diodes, 1 IC and 1 switch.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

A little CH552G USB devboard, for quickly testing ideas, with 2 touch areas, 2 LEDs, integrated headers and I2C pullup resistors

- Mini USB Devboard - Features - Schematic - PCB - Case - Firmware - BOM

A little CH552G USB devboard, for quickly testing ideas. I wanted a little board, with nice headers for quickly testing modules/ideas, as whenever i need one I can't find one. That or I don't have the correct cable (shoutout to the RPi Pico's micro usb). It will also be my first time soldering smd, so that will be fun.

Mini devboard, from the project README
From the project README

Main components on the Mini devboard

CH552G

Mini devboard bill of materials (BOM)

14 components, 9 distinct parts.

QtyPartRefs
1
CH552G
U1
1
USB_A
J1
1
Conn_02x05_Counter_Clockwise
J2
1
SW_Push
SW1
2
LED
D1, D2
3
100nF
C1, C2, C3
1
10k
R1
2
330
R2, R3
2
?
R4, R5

Mini devboard design files

The KiCad project lives in the FraI3mega/mini-devboard repository on GitHub; these links point at the commit this page was built from.

Mini devboard: common questions

What microcontroller does the Mini devboard use?

The Mini devboard is built around the CH552G, from the WCH CH32/CH55x family.

How big is the Mini devboard PCB?

The Mini devboard measures 19 × 56.4 mm, has 2 copper layers and is 1 mm thick.

How many components are on the Mini devboard?

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

Where can I download the Mini devboard design files?

From the FraI3mega/mini-devboard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Mini devboard design in my own project?

Yes, under the terms of its CERN-OHL-W-2.0 license, which FraI3mega chose for the repository.

Can I test firmware for the Mini devboard 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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