Base Node Test Board

koko69420·HomeBus·Hardware/base_node/base_node_clad_v2.kicad_pcb

About the Base Node Test Board

Base Node Test Board is an open source WCH CH32/CH55x PCB design by koko69420, published on GitHub. It is a 2-layer board measuring 130 × 80 mm, with 36 components from 27 distinct parts.

Its main chip is the CH32X033F8P6, from the WCH CH32/CH55x family. Other key parts include the MAX491E, 74HC165 and MP1584EN_Module. By type, the board carries 10 resistors, 8 connectors, 6 capacitors, 5 diodes, 4 ICs and 3 switches.

From the project

Hard wired home automation, based on a RSICV MCU and RS-422 communication protocol

The HomeBus Base Node is the primary in-wall actuator and sensor module in the HomeBus distributed automation network. Designed to fit into standard residential switch flush boxes behind wall plates, it interfaces physical toggle switches and rotary encoders with the HomeBus RS-422 serial bus while driving external relay modules to switch lights, appliances, and inductive loads.

Base Node Test Board, from the project README — From the project README

Main components on the Base Node Test Board

CH32X033F8P6 MAX491E 74HC165 MP1584EN_Module

Base Node Test Board bill of materials (BOM)

36 components, 27 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	CH32X033F8P6	TSSOP-20-2.54_expander	U1
1	MAX491E	SOIC-14-2.54_expander	U2
1	74HC165	SOIC-16-2.54_expander	U3
1	MP1584EN_Module	MP1584 Module	U4
1	IO Interface	PinSocket_1x10_P2.54mm_Vertical_SMD_Pin1Left	J1
1	Conn_02x06_Odd_Even	PinSocket_2x06_P2.54mm_Vertical_SMD	J2
1	Expantion Connector	PinSocket_2x10_P2.54mm_Vertical_SMD	J3
1	I2C	PinSocket_1x04_P2.54mm_Vertical_SMD_Pin1Left	J4
1	24vdc	PinSocket_1x02_P2.54mm_Vertical_SMD_Pin1Left	J5
1	Encoder 1	PinSocket_1x04_P2.54mm_Vertical_SMD_Pin1Left	J6
1	Encoder 2	PinSocket_1x04_P2.54mm_Vertical_SMD_Pin1Left	J7
1	WCH-LinkE Connector	IDC-Header_2x05_P2.54mm_Vertical_SMD	J8
1	SW_DIP_x08	SW_DIP_SPSTx08_Slide_6.7x21.88mm_W7.62mm_P2.54mm_LowProfile	SW1
1	RST	SW_SPST_PTS647_Sx38	SW2
1	Boot	SW_SPST_PTS647_Sx38	SW3
2	SM712_SOT23	SOT-23	D1, D3
1	WS2812B	LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm	D2
1	SMBJ26A	D_SMB	D4
1	LED	LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder	D9
5	100nF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1, C3, C5, C7, C8

Show 7 more

Qty	Part	Footprint	Refs
1	10uF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C2
1	330Ω	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1
2	10KΩ	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R2, R4
1	1kΩ	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R3
2	120Ω	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R5, R6
2	4.7kΩ	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R7, R8
2	10KΩ	R_Array_SIP9	RN1, RN2

Base Node Test Board design files

The KiCad project lives in the koko69420/HomeBus repository on GitHub; these links point at the commit this page was built from.

Base Node Test Board: common questions

What microcontroller does the Base Node Test Board use?

The Base Node Test Board is built around the CH32X033F8P6, from the WCH CH32/CH55x family.

How big is the Base Node Test Board?

The Base Node Test Board measures 130 × 80 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Base Node Test Board?

36 components, from 27 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 Base Node Test Board design files?

From the koko69420/HomeBus 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 Base Node Test Board design in my own project?

The repository has no license, so all rights stay with koko69420. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Base Node Test Board 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.