2 layers86.4 × 91.4 mm
LightPanel
Kitsune-Robotics/RackDistribution-4U
This repo contains all the firmware and hardware for the RackDistribution-4U. If you're looking for the latest docs/builds, see our Releases Page.
25 parts1BSD-2-Clause
2 layers86.4 × 91.4 mm
PumpMotherboard
Kitsune-Robotics/RackDistribution-4U1This repo contains all the firmware and hardware for the RackDistribution-4U. If you're looking for the latest docs/builds, see our Releases Page.
- Size
- 86.4 × 91.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 64
- Nets
- 61
- Pads
- 251
- Tracks, vias
- 328, 70
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 30 Jul 2026
- Updated
- 9 Oct 2026
Overview
PumpMotherboard is an open-source printed circuit board by Kitsune-Robotics, from the Kitsune-Robotics/RackDistribution-4U repository on GitHub, published under the BSD-2-Clause licence. It is a 2-layer board of 86.4 × 91.4 mm with 64 parts on 61 nets, routed with 328 tracks and 70 vias.
It is built around the AP63205WU, MMBT3904 and AO4407A. Its parts include 23 resistors, 10 transistors, 10 connectors, 2 capacitors and 2 diodes. It belongs with the RP2040 boards of this library.
Main components
3
AP63205WU
TSOT-23-6-40℃~+85℃@(TA) 1 1.1MHz 22uA 2A 3.8V~32V 5V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
AO4407A
SOP-8-55℃~+150℃ 1 P-Channel 1.8V 14A 2.05nF 20nC@4.5V、40nC@10V 3.1W 300pF 30V 330pF 9.5mΩ@10V、14.7mΩ@4.5V SOP-8 MOSFETs ROHSUMWMOSFETs
README
README.md
RackDistribution-4U
This repo contains all the firmware and hardware for the RackDistribution-4U. If you're looking for the latest docs/builds, see our Releases Page.
Getting Started
First, clone this repo (and optionally checkout a branch)
git clone https://github.com/Kitsune-Robotics/RackDistribution-4U.git
cd RackDistribution-4UInit Submodules
Some libraries and resources are included as submodules, run the following command to initialize them before opening the main sch
(If you get a missing library error, make sure to do this)
git submodule update --init --recursiveProject Layout
If you want to use this project template for yourself, you can find it here!
Parts
64| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 10K | Resistor_SMD:R_0805_2012Metric | R1, R4, R6, R8, R10, R12, R14, R16, R19, R20, R21, R22 |
| 10 | 1K | Resistor_SMD:R_0805_2012Metric | R2, R3, R5, R7, R9, R11, R13, R15, R18, R23 |
| 9 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q10 |
| 8 | Fan_4pin | Connector:FanPinHeader_1x04_P2.54mm_Vertical | M1, M2, M3, M4, M5, M6, M7, M8 |
| 4 | MountingHole | MountingHole:MountingHole_4.3mm_M4 | H1, H2, H3, H4 |
| 3 | T_SENSOR | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3, J4, J5 |
| 1 | 0R | Resistor_SMD:R_0805_2012Metric | R17 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 10uF | Capacitor_SMD:CP_Elec_4x3 | C1 |
| 1 | 12V Input | Connector_BarrelJack:BarrelJack_GCT_DCJ200-10-A_Horizontal | J401 |
| 1 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D2 |
| 1 | 4.7uH | Inductor_SMD:L_APV_ANR4012 | L1 |
| 1 | AC_LEDs | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J2 |
| 1 | AO4407A | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | Q9 |
| 1 | AP63205WU | Package_TO_SOT_SMD:TSOT-23-6 | U2 |
| 1 | BTB | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J1 |
| 1 | LOGO | KenwoodFox:KITSUNE_LOGO | G*** |
| 1 | PWR | LED_SMD:LED_0805_2012Metric | D1 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_Common_SMD | A1 |
| 1 | SPKR | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J9 |
| 1 | SW_IN0 | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J6 |
| 1 | SW_IN1 | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J7 |
| 1 | SW_IN2 | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J8 |
The 63 most common of 64 parts.
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Questions
How big is the PumpMotherboard PCB?
It measures 86.4 × 91.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PumpMotherboard use?
64 parts, built around the AP63205WU, MMBT3904 and AO4407A. 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 PumpMotherboard KiCad files?
From the Kitsune-Robotics/RackDistribution-4U repository on GitHub, at the commit this page was made from: the board is Hardware/PumpMotherboard/PumpMotherboard.kicad_pcb and its schematic Hardware/LightPanel/LightPanel.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PumpMotherboard design in my own project?
Its repository publishes it under the BSD-2-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).