2 layers282.6 × 90.8 mm
Alufo
bgkendall/Alufo
Small split keyboard using stacked one-layer aluminium core boards with an on-board CH552T controller.
94 partsCERN-OHL-S-2.0
2 layers282.6 × 90.8 mm
Alufo
bgkendall/AlufoSmall split keyboard using stacked one-layer aluminium core boards with an on-board CH552T controller.
- Size
- 282.6 × 90.8 mm
- Copper layers
- 2
- Thickness
- 1.2 mm
- Parts
- 94
- Nets
- 70
- Pads
- 324
- Tracks, vias
- 451, 0
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Jul 2024
- Updated
- 16 Aug 2026
Overview
Alufo is an open-source printed circuit board by bgkendall, from the bgkendall/Alufo repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 282.6 × 90.8 mm with 94 parts on 70 nets, routed with 451 tracks and 0 vias.
It is built around the CH552T, USBLC6-2P6 and PMEG2010EA, with the SK6812MINI-E among its other parts. Its parts include 20 diodes, 19 switches, 10 resistors, 3 capacitors and 3 ICs. It belongs with the keyboards and input boards and the 8051 (CH55x, STC, AT89) boards of this library.
Main components
4
CH552T
TSSOP-20-40℃~+85℃ 12Mbps 3.3V~5V USB 2.0 USB to UART、USB to SPI TSSOP-20 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
USBLC6-2P6
SOT-666-6-40℃~+125℃ 150nA 17V 2 3.5pF 5.25V 5A@8/20us 6V ESD IEC 61000-4-2 Unidirectional SOT-666-6 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)
PMEG2010EA
SOD-3231 Independent 1A 20V 50uA@15V 550mV@1A 5A SOD-323 Schottky Diodes ROHSNexperiaSchottky Diodes
SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
README
README.mdAlufo
Small split keyboard using stacked one-layer aluminium core boards with an on-board CH552T controller.
Parts
94| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 1N4148 | Project_Library:D_SOD-123_Mod | D11, D12, D13, D14, D15, D16, D21, D22, D23, D24, D25, D26, D31, D32, D33, D34 +2 |
| 17 | PG1350 | Project_Library:SW_choc_v1_HS_CPG135001S30_1layer_1u | K11, K12, K13, K14, K15, K16, K21, K22, K23, K24, K25, K26, K31, K32, K33, K34 +1 |
| 17 | SwitchHole | Project_Library:SW_choc_v1_Plate_CPG135001S30_1u | PK11, PK12, PK13, PK14, PK15, PK16, PK21, PK22, PK23, PK24, PK25, PK26, PK31, PK32, PK33, PK34 +1 |
| 6 | 0R | Resistor_SMD:R_2010_5025Metric | R9, R12, R13, R14, R15, R16 |
| 5 | ScrewHole | MountingHole:MountingHole_2.2mm_M2 | H6, H7, H8, H9, H10 |
| 5 | SolderNut | Project_Library:MountingHole_2.2mm_M2_SMD_Solder_Nut | H1, H2, H3, H4, H5 |
| 4 | Mousebites | Project_Library:Mousebites | H11, H12, H13, H14 |
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C3, C5 |
| 3 | 5k1 | Resistor_SMD:R_0603_1608Metric | R1, R3, R7 |
| 2 | USBLC6-2P6 | Project_Library:SOT-666_Mod | U3, U5 |
| 2 | USB_C_Receptacle_USB2.0_16P_2SH | Project_Library:USB_C_Receptacle_GCT_USB4110 | J1, J3 |
| 1 | 1N4148 | Project_Library:D_SOD-123 | D3 |
| 1 | 500mA | Fuse:Fuse_0603_1608Metric | F1 |
| 1 | 5k1–20k | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | BOOT | Project_Library:SW_SPST_SKQG_WithStem | SW1 |
| 1 | CH552T | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | FerriteBead | Inductor_SMD:L_0805_2012Metric | FB1 |
| 1 | LED | Project_Library:LED_0805_2012Metric_Mod | L1 |
| 1 | NetTie_2 | Project_Library:NetTie-2_SMD_Pad0.2mm | NT1 |
| 1 | PG1350_1½U | Project_Library:SW_choc_v1_HS_CPG135001S30_1layer_1.5u | K36 |
| 1 | PMEG2010EA | Diode_SMD:D_SOD-323 | D1 |
| 1 | SK6812MINI-E | PCM_marbastlib-various:LED_6028R | L3 |
| 1 | SwitchHole | Project_Library:SW_choc_v1_Plate_CPG135001S30_1.5u | PK36 |
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Questions
How big is the Alufo PCB?
It measures 282.6 × 90.8 mm and has 2 copper layers, 1.2 mm thick.
What parts does the Alufo use?
94 parts, built around the CH552T, USBLC6-2P6, PMEG2010EA and SK6812MINI-E. 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 Alufo KiCad files?
From the bgkendall/Alufo repository on GitHub, at the commit this page was made from: the board is PCB Left/Alufo.kicad_pcb and its schematic PCB Left/Alufo-matrix.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Alufo design in my own project?
Its repository publishes it under the CERN-OHL-S-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).