2 layers50 × 87 mm StackChanPwd, the printed circuit board in 3D

StackChanPwd

M5Stack-embedded super cute humanoid controller unit

Size: 50 × 87 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 47
Nets: 61
Pads: 230
Tracks, vias: 372, 108
Pours: 7
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 14 Jun 2025
Updated: 27 Aug 2025

Overview

StackChanPwd is an open-source printed circuit board by lipoyang, from the lipoyang/StackChanPwd repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 50 × 87 mm with 47 parts on 61 nets, routed with 372 tracks and 108 vias.

It is built around the 74HCT2G125DC, 74LVC2G125DP and OKL-T/3-W12N-C, with the PCA9685PW, B3B-ZR and B3B-EH-A among its other parts. Its parts include 14 connectors, 9 capacitors, 9 resistors, 4 ICs and 1 diode.

Main components

README

README.md

Stack-chan Powerd

日本語

Stack-chan Powerd is a M5Stack-embedded super cute humanoid controller unit.

System Overview

Document

→ https://www.hackster.io/lipoyang/m5stack-as-a-humanoid-brain-b98882

Files

firmware : Source codes of the firmware.
case : STEP and STL files of mechanical parts
boards : Schematics and PCB layout designs

Original Work

This project is a derivative work inspired by Stack-chan. Stack-chan is the palm-sized super cute communication robot created by Shinya Ishikawa.

Parts

Qty	Value	Footprint	References
5	0.1u	Capacitor_SMD:C_0603_1608Metric	C1, C3, C5, C6, C7
5	1k	Resistor_SMD:R_0603_1608Metric	R1, R1, R3, R5, R6
4	B3B-ZR	Connector_JST:JST_ZH_B3B-ZR_1x03_P1.50mm_Vertical	CN3, CN4, CN5, CN6
4	Grove	Grove:GROVE-HW4-2.0	CN2, CN6, CN7, CN8
4	mountinghole_M2_M3	m5-pantilt:mountinghole_M2_M3	Hole1, Hole2, Hole3, Hole4
2	100	Resistor_SMD:R_0603_1608Metric	R2, R4
2	100u	Capacitor_SMD:C_1206_3216Metric	C1, C2
2	100u	Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C2, C4
2	B3B-EH-A	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	CN4, CN5
2	PinHeader	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	JP1, JP2
1	10	Resistor_SMD:R_0603_1608Metric	R3
1	330	Resistor_SMD:R_0603_1608Metric	R2
1	74HCT2G125	Package_SO:TSSOP-8_3x3mm_P0.65mm	U2
1	74LVC2G125	Package_SO:TSSOP-8_3x3mm_P0.65mm	U1
1	B2PS-VH	Connector_JST:JST_VH_B2PS-VH_1x02_P3.96mm_Horizontal	CN1
1	Conn_01x02_Pin	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	JP3
1	OKL-T/3-W12N	OKL_T6_W12N:OKL-T_X-WXXN	U1
1	PCA9685PW	Package_SO:TSSOP-28_4.4x9.7mm_P0.65mm	U3
1	PinHeader	Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical	CN3
1	PinHeader	Connector_PinHeader_2.54mm:PinHeader_2x15_P2.54mm_Vertical_SMD	CN1
1	PinSocket	Connector_PinSocket_2.54mm:PinSocket_2x15_P2.54mm_Vertical_SMD	CN2
1	SS2040FL	Diode_SMD:D_SOD-123F	D1
1	TestPin	Connector_Pin:Pin_D1.0mm_L10.0mm	TP1

The 45 most common of 47 parts.

Questions

How big is the StackChanPwd PCB?

It measures 50 × 87 mm and has 2 copper layers, 1.6 mm thick.

What parts does the StackChanPwd use?

47 parts, built around the 74HCT2G125DC, 74LVC2G125DP, OKL-T/3-W12N-C and PCA9685PW. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the StackChanPwd KiCad files?

From the lipoyang/StackChanPwd repository on GitHub, at the commit this page was made from: the board is boards/Panelize/StackChanPwd.kicad_pcb and its schematic boards/Bridge/Bridge.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the StackChanPwd design in my own project?

Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/lipoyang-stackchanpwd-stackchanpwd" title="StackChanPwd in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/lipoyang-stackchanpwd-stackchanpwd.jpg" alt="StackChanPwd" width="1200" height="900">

A picture that opens the board, for a README

[![StackChanPwd](https://pcbkit.io/embed/boards/lipoyang-stackchanpwd-stackchanpwd.jpg?size=s)](https://pcbkit.io/boards/lipoyang-stackchanpwd-stackchanpwd)

Source

Repository: lipoyang/StackChanPwd
Board file: boards/Panelize/StackChanPwd.kicad_pcb
Commit: f74807c
Licence: Apache-2.0

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