2 layers200 × 170 mm
Routing R1
ddasdkimo/rack-atx-controller
10-host isolated ATX rack controller hardware planning, interactive 3D model and wiring documentation
698 parts
2 layers100 × 110 mm
Rack atx controller
ddasdkimo/rack-atx-controller10-host isolated ATX rack controller hardware planning, interactive 3D model and wiring documentation
- Size
- 100 × 110 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 304
- Nets
- 243
- Pads
- 984
- Tracks, vias
- 3,855, 252
- Pours
- 32
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 13 Oct 2026
- Updated
- 30 Oct 2026
Overview
Rack atx controller is an open-source printed circuit board by ddasdkimo, from the ddasdkimo/rack-atx-controller repository on GitHub. It is a 2-layer board of 100 × 110 mm with 304 parts on 243 nets, routed with 3,855 tracks and 252 vias.
It is built around the ESP32-S3FN8, TLP3122A(TPL,E and 74HC595D,118, with the W5500, MMBT3904 and PESD5V0S2BT among its other parts. Its parts include 144 resistors, 43 diodes, 41 capacitors, 27 ICs and 25 transistors. It belongs with the ESP32 boards of this library.
Main components
12
ESP32-S3FN8
QFN-56-EP(7x7)Watchdog reset、Software reset、Built-in general-purpose timer、Built-in temperature sensor、Touch function、True random number generator (TRNG)、Storage encryption、Infrared remote control QFN-56-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSEspressif SystemsMicrocontrollers (MCU/MPU/SOC)
TLP3122A(TPL,E
SOP-4-2.54mm-40℃~+110℃ 1.27V 1.4A 130mΩ 1ms 25mA 2ms 3.75kV 60V One set normally open: 2A (SPST - normally open) SOP-4-2.54mm Solid State Relays (MOS Output) ROHSToshibaSolid State Relays (MOS Output)
74HC595D,118
SOIC-16-40℃~+125℃ 1 100MHz 19ns@4.5V,50pF 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOIC-16 Shift Registers ROHSNexperiaShift Registers
W5500
LQFP-48_7x7-40℃~+85℃ 10BASE-T、100BASE-TX 3.3V 32KB SPI SPI Wake-up function、Programmable LED indication、Low-power mode Yes LQFP-48(7x7) Ethernet Controllers ROHSWIZNETEthernet Controllers
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)PESD5V0S2BT
SOT-2312A 130W@8/20us 14V 2 35pF 5.5V 5V 5nA Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5 SOT-23 ESD and Surge Protection (TVS/ESD) ROHSNexperiaESD And Surge Protection (TVS/ESD)
S10B-PHDSS(LF)(SN)
弯插,P=2mm-25℃~+85℃ 10P 11.9mm 2 250V 2mm 2mm 2x5P 3A 5 5mm 9mm Copper alloy Glass fiber reinforced PA66 PHD Right Angle Tin UL94V-0 White Push-Pull,P=2mm Wire To Board Connector ROHSJSTWire To Board ConnectorAO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
PZ254V-11-02P
插件,P=2.54mm-40℃~+105℃ 1 1x2P 2.54mm 2.5mm 250V 2P 3A 3mm 6.1mm Black Brass Gold Square pin Through Hole Plugin,P=2.54mm Pin Headers ROHSXFCNPin Headers
HR911105A
插件0℃~+70℃ 1 Filtered Gold Non-PoE Phosphor bronze RJ45 Jack Right Angle Shielded With LED 插件 Ethernet Connectors / Modular Connectors (RJ45 RJ11) ROHSHANRUNEthernet Connectors / Modular Connectors (RJ45 RJ11)
PRTR5V0U2X,215
-UncategorisedNXP Semiconductors
TYPE-C-31-M-12
SMD-30℃~+80℃ 1 10,000 cycles 16P 20V 5A 7.35mm Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSHRO ElectronicsUSB Connectors
README
hardware/cad/README.mdActive CAD: B.2 schematic / R.2 routing
Open B2/rack-atx-controller.kicad_pro for the controller schematic; B2/adapter.kicad_pro for the six-component passive adapter; B2/rack-atx-controller.kicad_pcb in PCB Editor for the 100×110 mm routed candidate. Routing was authorized by the user. No Gerber or CPL exists.
The B.2 controller contains 300 electrical components; the placement adds four M3 holes. The controller has 2,754 track segments and 185 vias; the 26×34 mm adapter has 30 segments and no vias. Both boards have zero native unconnected items and configured DRC violations. The web 3D uses native placement, copper and adapter coordinates with simplified component envelopes. USB/Ethernet qualification, factory DFM and physical tests remain; see ../ROUTING-R2.md. Generators write into B2/placement to preserve the routed master.
python3 scripts/make-schematic.py
kicad-cli sch export netlist --format kicadxml -o artifacts/local/controller.xml hardware/cad/B2/rack-atx-controller.kicad_sch
kicad-cli sch export netlist --format kicadxml -o artifacts/local/adapter.xml hardware/cad/B2/adapter.kicad_sch
kicad-cli sch erc --format json -o artifacts/local/erc.json hardware/cad/B2/rack-atx-controller.kicad_sch
kicad-cli sch erc --format json -o artifacts/local/adapter-erc.json hardware/cad/B2/adapter.kicad_sch
python3 scripts/check-circuit.py
python3 hardware/simulation/run-b2.py
python3 scripts/cost.py
kicad-cli sch export pdf -o hardware/release/controller-schematic.pdf hardware/cad/B2/rack-atx-controller.kicad_sch
kicad-cli sch export pdf -o hardware/release/adapter-schematic.pdf hardware/cad/B2/adapter.kicad_schRun from the repository root. Use KiCad's bundled Python (wx + pcbnew) for scripts/make-layout-s3.py and scripts/check-layout-s3.py, then kicad-cli pcb drc --format json -o artifacts/local/s3-drc.json hardware/cad/B2/rack-atx-controller.kicad_pcb. Export/ ERC operations on the same project must run sequentially. Source library paths in generators currently target macOS KiCad; adapt paths on other platforms.
BOM, schematic and PCB candidate footprints agree; custom TLP3122A and input-terminal land patterns live in RackATX.pretty, referenced relative to B2. Manufacturer/physical DFM qualification is still required. Raw CLI netlists stay ignored because they include workstation paths. Never publish them. Historical CAD in this directory and archive/B1 is retained, not the current revision.
Parts
304| Qty | Value | Footprint | References |
|---|---|---|---|
| 40 | 1.5k 1% | Resistor_SMD:R_0603_1608Metric | R103, R107, R111, R115, R301, R302, R303, R304, R305, R306, R307, R308, R309, R310, R311, R312 +24 |
| 40 | 220 1% | Resistor_SMD:R_0603_1608Metric | R41, R42, R45, R46, R49, R50, R101, R102, R105, R106, R109, R110, R113, R114, R117, R118 +24 |
| 32 | 100k 1% | Resistor_SMD:R_0603_1608Metric | R12, R13, R26, R29, R31, R32, R34, R38, R40, R44, R48, R100, R104, R108, R112, R116 +16 |
| 23 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q2, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18, Q19, Q20, Q21, Q22, Q23, Q200 +7 |
| 20 | KT-0603R / RED | RackATX:LED_0603_1608Metric_CathodeSilk | D101, D102, D103, D104, D105, D106, D107, D108, D109, D110, D111, D112, D113, D114, D115, D116 +4 |
| 20 | PESD5V0S2BT | Package_TO_SOT_SMD:SOT-23 | D2, D3, D4, D5, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21 +4 |
| 20 | TLP3122A(TPL,E | RackATX:TLP3122A_11-4M1S | U10, U11, U12, U13, U14, U15, U16, U17, U18, U19, U20, U21, U22, U23, U24, U25 +4 |
| 17 | 100n | Capacitor_SMD:C_0603_1608Metric | C2, C3, C6, C8, C10, C11, C12, C13, C24, C25, C26, C28, C37, C38, C39, C42 +1 |
| 15 | 10k 1% | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R15, R16, R17, R25, R27, R28, R30, R33, R35, R36, R37 |
| 10 | S10B-PHDSS(LF)(SN) | Connector_JST:JST_PHD_S10B-PHDSS_2x05_P2.00mm_Horizontal | J01, J02, J03, J04, J05, J06, J07, J08, J09, J10 |
| 5 | 10u | Capacitor_SMD:C_0805_2012Metric | C1, C14, C15, C27, C29 |
| 4 | 20p | Capacitor_SMD:C_0603_1608Metric | C17, C18, C31, C32 |
| 4 | 330 1% | Resistor_SMD:R_0603_1608Metric | R22, R23, R321, R322 |
| 4 | MountingHole_3.2mm_M3 | MountingHole_3.2mm_M3 | MH1, MH2, MH3, MH4 |
| 3 | 100n | Capacitor_SMD:C_0402_1005Metric | C21, C22, C23 |
| 3 | 1u | Capacitor_SMD:C_0603_1608Metric | C7, C16, C30 |
| 3 | 74HC595D,118 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U4, U5, U6 |
| 2 | 0 1% | Resistor_SMD:R_0603_1608Metric | R5, R24 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric | C4, C5 |
| 2 | 33 1% | Resistor_SMD:R_0603_1608Metric | R10, R11 |
| 2 | 47 1% | Resistor_SMD:R_0603_1608Metric | R6, R7 |
| 2 | 49.9 1% | Resistor_SMD:R_0402_1005Metric | R20, R21 |
| 2 | 49.9 1% | Resistor_SMD:R_0603_1608Metric | R18, R19 |
| 2 | 5.1k 1% | Resistor_SMD:R_0603_1608Metric | R8, R9 |
| 2 | 6.8n | Capacitor_SMD:C_0402_1005Metric | C34, C35 |
| 2 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1, Q4 |
| 2 | KT-0805G / GREEN | RackATX:LED_0805_2012Metric_CathodeSilk | D201, D202 |
| 2 | PZ254V-11-02P | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J102, J103 |
| 1 | 10n | Capacitor_SMD:C_0603_1608Metric | C20 |
| 1 | 10n | Capacitor_SMD:C_0402_1005Metric | C33 |
| 1 | 12.4k 1% | Resistor_SMD:R_0603_1608Metric | R14 |
| 1 | 120R@100MHz GZ1608D121TF | Inductor_SMD:L_0603_1608Metric | L2 |
| 1 | 1n | Capacitor_SMD:C_0603_1608Metric | C40 |
| 1 | 22n | Capacitor_SMD:C_0805_2012Metric | C36 |
| 1 | 25MHz CL12pF | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y2 |
| 1 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C19 |
| 1 | 4.7uH FNR4018S4R7MT | Inductor_SMD:L_Changjiang_FNR4018S | L1 |
| 1 | 40MHz CL12pF | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | AP63203WU-7 | Package_TO_SOT_SMD:TSOT-23-6 | U1 |
| 1 | ESP32-S3FN8 | RackATX:ESP32_S3_QFN56_EP4_16Window | U2 |
| 1 | HR911105A | Connector_RJ:RJ45_Hanrun_HR911105A_Horizontal | J105 |
| 1 | MC14541BDR2G | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U7 |
| 1 | MF-MSMF150/24X-2 1.5A | Fuse:Fuse_1812_4532Metric | F1 |
| 1 | PRTR5V0U2X,215 | Package_TO_SOT_SMD:SOT-143 | D1 |
| 1 | TYPE-C-31-M-12 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J104 |
| 1 | W5500 | Package_QFP:LQFP-48_7x7mm_P0.5mm | U3 |
| 1 | WJ500V-5.08-2P | RackATX:WJ500V_5.08_2P | J101 |
Questions
How big is the Rack atx controller PCB?
It measures 100 × 110 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Rack atx controller use?
304 parts, built around the ESP32-S3FN8, TLP3122A(TPL,E, 74HC595D,118 and W5500. 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 Rack atx controller KiCad files?
From the ddasdkimo/rack-atx-controller repository on GitHub, at the commit this page was made from: the board is hardware/cad/B2/rack-atx-controller.kicad_pcb and its schematic hardware/archive/B1/cad/adapter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Rack atx controller design in my own project?
Its repository states no licence, so its author keeps all rights: ask ddasdkimo before reusing the design.
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