2 layers50 × 87 mm
StackChanPwd
lipoyang/StackChanPwd
M5Stack-embedded super cute humanoid controller unit
47 parts6Apache-2.0
2 layers50 × 50 mm
Bridge
lipoyang/StackChanPwd6M5Stack-embedded super cute humanoid controller unit
- Size
- 50 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 52
- Pads
- 171
- Tracks, vias
- 297, 103
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 14 Jun 2025
- Updated
- 27 Aug 2025
Overview
Bridge 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 × 50 mm with 34 parts on 52 nets, routed with 297 tracks and 103 vias.
It is built around the 74HCT2G125DC, 74LVC2G125DP and PCA9685PW, with the B3B-EH-A and SS2040FL among its other parts. Its parts include 8 connectors, 7 capacitors, 6 resistors, 3 ICs and 1 diode. It belongs with the interfaces and adapters boards of this library.
Main components
5
74HCT2G125DC
VSSOP-8-0.5mm-40℃~+125℃ 1 15ns@4.5V,50pF 2 20uA 4.5V~5.5V 6mA 6mA 74HCT Output enable Tri-State Unidirectional VSSOP-8-0.5mm Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
74LVC2G125DP
TSSOP-8-40℃~+125℃ 1 1.65V~5.5V 1.9ns@5V,50pF 2 32mA 32mA 4uA 74LVC Schmitt trigger Tri-State Unidirectional TSSOP-8 Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
PCA9685PW
TSSOP-28-40℃~+85℃ 100kHz~1MHz 16 2.3V~5.5V 25mA 5.5V Built-in PWM TSSOP-28 LED Drivers ROHSNXP SemiconductorsLED Drivers
B3B-EH-A
插件,P=2.5mm-25℃~+85℃ 1 10mm 1x3P 2.5mm 250V 3 3.8mm 3A 3P 6mm Brass EH K Pin PA66 Through Hole Tin UL94V-0 White 插件,P=2.5mm Wire To Board Connector ROHSJSTWire To Board Connector
SS2040FL
SOD-123FLSOD-123FL Schottky Diodes ROHSFUXINSEMISchottky Diodes
README
README.mdStack-chan Powerd
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
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C1, C3, C5, C6, C7 |
| 4 | 1k | Resistor_SMD:R_0603_1608Metric | R1, R3, R5, R6 |
| 4 | mountinghole_M2_M3 | m5-pantilt:mountinghole_M2_M3 | Hole1, Hole2, Hole3, Hole4 |
| 3 | Grove | Grove:GROVE-HW4-2.0 | CN6, CN7, CN8 |
| 2 | 100 | Resistor_SMD:R_0603_1608Metric | R2, R4 |
| 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 | 74HCT2G125 | Package_SO:TSSOP-8_3x3mm_P0.65mm | U2 |
| 1 | 74LVC2G125 | Package_SO:TSSOP-8_3x3mm_P0.65mm | U1 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP3 |
| 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 33 most common of 34 parts.
Questions
How big is the Bridge PCB?
It measures 50 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Bridge use?
34 parts, built around the 74HCT2G125DC, 74LVC2G125DP, PCA9685PW and B3B-EH-A. 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 Bridge KiCad files?
From the lipoyang/StackChanPwd repository on GitHub, at the commit this page was made from: the board is boards/Bridge/Bridge.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 Bridge 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).
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