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Bottom

Noteolvides·CubeTouch·Hardware/Bottom/Bottom.kicad_pcb

Bottom PCB layout, top view — open source WCH CH32/CH55x board by Noteolvides

About the Bottom PCB

Bottom is an open source WCH CH32/CH55x PCB design by Noteolvides, published on GitHub under the MIT license. It is a 2-layer board measuring 40 × 40 mm, with 28 components from 15 distinct parts.

Its main chip is the CH554G, from the WCH CH32/CH55x family. By type, the board carries 9 connectors, 8 capacitors, 6 diodes, 3 resistors, 1 IC and 1 switch.

It belongs with the displays & leds designs in this gallery.

From the project

CubeTouch Docs

CubeTouch is made up of the CH552 micontroller and 6 WS2812 LEDs that illuminate the planets thanks to the diffusion of the FR4 material. This device is already loaded with a firmware that when pressing one of the 5 planets will send a combination of keys to the computer. These can be modified on the

Bottom, from the project README
From the project README

Main components on the Bottom

CH554G

Bottom bill of materials (BOM)

28 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
CH554G
CH552G
U1
1
C709357
USB_C_Receptacle_USB2.0
J1
1
Quamtum Front
J2
1
Gargantua Top
J3
1
Zebrum Left
J4
1
Dune Right
J5
1
Enkrusion Back
J6
1
3.2
J7
1
3.1
J8
1
3.0
J9
1
C318884
Tactile Button
SW1
6
WS2812B
D1, D2, D3, D4, D5, D6
8
C14663
0.1uf
C1, C2, C3, C4, C5, C6, C7, C8
2
C25905
5.1K
R1, R2
1
C25197
10K
R3

Bottom design files

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

Bottom: common questions

What microcontroller does the Bottom use?

The Bottom is built around the CH554G, from the WCH CH32/CH55x family.

How big is the Bottom PCB?

The Bottom measures 40 × 40 mm, has 2 copper layers and is 1 mm thick.

How many components are on the Bottom?

28 components, from 15 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 Bottom design files?

From the Noteolvides/CubeTouch 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 Bottom design in my own project?

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

Can I test firmware for the Bottom 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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