2 layers77.5 × 48.5 mm
4 layers279.5 × 97 mm
Alpha centauri pcb
jacob-w-gable/alpha_centauri1A split, ergonomic, mechanical keyboard with 40 keys, designed for typing speed and comfort.
- Size
- 279.5 × 97 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 224
- Nets
- 212
- Pads
- 1,148
- Tracks, vias
- 2,723, 537
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 1 Nov 2024
- Updated
- 27 Jul 2026
Overview
Alpha centauri pcb is an open-source printed circuit board by jacob-w-gable, from the jacob-w-gable/alpha_centauri repository on GitHub, published under the MIT licence. It is a 4-layer board of 279.5 × 97 mm with 224 parts on 212 nets, routed with 2,723 tracks and 537 vias.
It is built around the RP2040, W25Q128JVSIQ and AMS1117-3.3, with the GG0402052R542P, ABM8-272-T3 and AO3400A among its other parts. Its parts include 90 diodes, 46 switches, 38 capacitors, 16 resistors and 6 ICs. It belongs with the keyboards and input boards and the RP2040 boards of this library.
Main components
8
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
GG0402052R542P
0402-55℃~+125℃ 100nA 15.5V 2.5pF 3A@8/20us 46W@8/20us 5.5V 5V ESD IEC 61000-4-2、IEC 61000-4-4 0402 ESD and Surge Protection (TVS/ESD) ROHSKyocera AVXESD And Surge Protection (TVS/ESD)
ABM8-272-T3
SMD3225-4P-40℃~+85℃ 10pF 12MHz 50Ω SMD crystal oscillator ±30ppm ±30ppm SMD3225-4P Crystals ROHSAbraconCrystals
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
SSAG230400
SMD-10℃~+60℃ 100,000 cycles 10mA 4.5mm 5V Rectangular Columnar SMD(SMT) Tab SP3T Surface Mount, Right Angle SMD Slide Switches ROHSALPSALPINESlide Switches
README
pcb/README.mdPCB Files
These are the files required to edit the PCB in Kicad. One thing that makes this PCB stand out, is the fact that you can use hotswap sockets for either MX or Choc style switches, without compromising the ability to use per-key LEDs. While this does unfortunately cut off one of the pads, it does not make an electrical difference.
Parts
224| Qty | Value | Footprint | References |
|---|---|---|---|
| 40 | Diode | ScottoKeebs_Components:Diode_SOD-123 | D10, D12, D13, D17, D19, D20, D22, D24, D29, D31, D32, D33, D34, D35, D38, D40 +24 |
| 40 | LED_SK6812MINI | ScottoKeebs_Components:LED_SK6812MINI | D1, D2, D3, D11, D14, D15, D16, D18, D21, D23, D25, D27, D28, D30, D36, D37 +24 |
| 38 | Keyswitch | AlphaCentauri:MX_Choc_Hotswap_Hybrid | S1, S2, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22, S23 +22 |
| 18 | 100n | Capacitor_SMD:C_0603_1608Metric | C4, C7, C10, C11, C12, C16, C17, C21, C22, C25, C27, C28, C29, C30, C31, C32 +2 |
| 12 | Mounting_Hole | MountingHole:MountingHole_4.3mm_M4 | H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12 |
| 8 | 1u | Capacitor_SMD:C_0603_1608Metric | C2, C3, C23, C24, C35, C36, C37, C38 |
| 8 | GG0402052R542P | GG0402052R542P:DIONC1006X55N | D83, D84, D85, D86, D87, D88, D89, D91 |
| 4 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C15, C20, C26 |
| 4 | 10uF | Capacitor_SMD:C_0805_2012Metric | C5, C6, C18, C19 |
| 4 | 15pF | Capacitor_SMD:C_0603_1608Metric | C13, C14, C33, C34 |
| 4 | 1k | Resistor_SMD:R_0603_1608Metric | R3, R8, R15, R16 |
| 4 | 27 | Resistor_SMD:R_0603_1608Metric | R4, R5, R13, R14 |
| 4 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2, R11, R12 |
| 4 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1, J2, J3, J4 |
| 2 | 10 | Resistor_SMD:R_0603_1608Metric | R6, R9 |
| 2 | 100k | Resistor_SMD:R_0603_1608Metric | R7, R10 |
| 2 | ABM8-272-T3 | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1, Y2 |
| 2 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3, U4 |
| 2 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | BOOTSEL | EVQ-P9P02W:EVQP2202M | SW1, SW4 |
| 2 | Keyswitch | AlphaCentauri:MX_Choc_Hotswap_Hybrid_1.5u | S8, S38 |
| 2 | Motor 1 + | TestPoint:TestPoint_Pad_2.5x2.5mm | M4, M5 |
| 2 | Motor 1 - | TestPoint:TestPoint_Pad_2.5x2.5mm | M3, M6 |
| 2 | Motor 2 + | TestPoint:TestPoint_Pad_2.5x2.5mm | M1, M7 |
| 2 | Motor 2 - | TestPoint:TestPoint_Pad_2.5x2.5mm | M2, M8 |
| 2 | RESET | EVQ-P9P02W:EVQP2202M | SW2, SW3 |
| 2 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U2, U5 |
| 2 | SS14 | Diode_SMD:D_SMA | D26, D54 |
| 2 | SSAG230400 | SSAG230400:SSAG230400 | S41, S42 |
| 2 | W25Q128JVS | W25Q128JVSIQ:SOIC127P790X216-8N | U1, U6 |
Questions
How big is the Alpha centauri pcb PCB?
It measures 279.5 × 97 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Alpha centauri pcb use?
224 parts, built around the RP2040, W25Q128JVSIQ, AMS1117-3.3 and GG0402052R542P. 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 Alpha centauri pcb KiCad files?
From the jacob-w-gable/alpha_centauri repository on GitHub, at the commit this page was made from: the board is pcb/alpha_centauri_pcb.kicad_pcb and its schematic pcb/alpha_centauri_pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Alpha centauri pcb design in my own project?
Its repository publishes it under the MIT 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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