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Fan Controller node

koko69420·HomeBus·Hardware/Fan_Controller_node/Fan_Controller_node.kicad_pcb

Fan Controller node PCB layout, top view — open source WCH CH32/CH55x board by koko69420

About the Fan Controller node PCB

Fan Controller node is an open source WCH CH32/CH55x PCB design by koko69420, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 51 components from 35 distinct parts.

Its main chip is the CH32X033F8P6, from the WCH CH32/CH55x family. Other key parts include the 74HC165, MAX491E, H11AA1, HCPL-3120 and B2415S-1W. By type, the board carries 16 resistors, 9 capacitors, 7 ICs, 7 diodes, 5 connectors and 2 transistors.

From the project

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

The HomeBus Fan Controller Node is an intelligent, solid-state AC speed controller designed for residential ceiling fans, exhaust fans, and inductive motor loads.

Unlike traditional multi-tap capacitor regulators or noisy phase-triac dimmers, the HomeBus Fan Controller combines zero-crossing detection, galvanically isolated gate driving, solid-state MOSFET switching, real-time load current sensing, and temperature monitoring on the RS-422 bus.

Main components on the Fan Controller node

CH32X033F8P674HC165MAX491EH11AA1HCPL-3120B2415S-1W

Fan Controller node bill of materials (BOM)

51 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
CH32X033F8P6
U1
1
74HC165
U2
1
~
U3
1
MAX491E
U4
1
H11AA1
U5
1
HCPL-3120
U6
1
B2415S-1W
U7
2
KIA7N65H
Q1, Q2
1
AC I/O
J1
1
RS-422 Trunk
J2
1
Lout
J3
1
I2C
J4
1
Lin
J5
1
ZHT103
CT1
1
2010T1A250V
F1
1
10D471K
RV1
1
SW_DIP_x08
SW1
1
10kΩ NTC
TH1
1
D_TVS
D1
2
SM712_SOT23
D2, D3
Show 15 more
QtyPartRefs
2
BZT52C15
D4, D5
1
WS2812B
D6
1
BAT54S
D7
5
100nF
C1, C2, C5, C7, C8
2
10uF
C3, C9
1
100 nF X7R
C4
1
10 µF
C6
2
330Ω
R1, R10
4
100kΩ
R2, R3, R8, R9
1
10KΩ
R4
4
10kΩ
R5, R13, R14, R15
2
10Ω
R6, R7
1
2K2Ω
R11
1
100Ω
R12
1
10KΩ
RN1

Fan Controller node design files

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

Fan Controller node: common questions

What microcontroller does the Fan Controller node use?

The Fan Controller node is built around the CH32X033F8P6, from the WCH CH32/CH55x family.

How big is the Fan Controller node PCB?

The Fan Controller node measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fan Controller node?

51 components, from 35 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 Fan Controller node 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 Fan Controller node 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 Fan Controller node 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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