2 layers250.9 × 79.4 mm
2 layers250.9 × 79.4 mm
Eightu Ortho
calvin-mcd/Eightu3stagger & ortho pcbs for the EIGHTU keyboard by @obobobobo!
- Size
- 250.9 × 79.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 141
- Nets
- 93
- Pads
- 551
- Tracks, vias
- 643, 27
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 27 Nov 2023
- Updated
- 22 Sep 2025
Overview
Eightu Ortho is an open-source printed circuit board by calvin-mcd, from the calvin-mcd/Eightu repository on GitHub. It is a 2-layer board of 250.9 × 79.4 mm with 141 parts on 93 nets, routed with 643 tracks and 27 vias.
It is built around the STM32F072CBT6 and SKQGABE010. Its parts include 51 diodes, 17 switches, 9 capacitors, 2 ICs and 2 connectors. It belongs with the keyboards and input boards and the RP2040 and STM32 boards of this library.
Main components
2
STM32F072CBT6
LQFP-48(7x7)-40℃~+85℃ 1.65V~3.6V 128KB 12bit 12bit 16KB 32 Bit 37 48MHz ARM Cortex-M0 Built-in FLASH LQFP-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
SKQGABE010
SMD-4P,5.2x5.2mm-40℃~+90℃ 1,000,000 cycles 1.5mm 1.6N 12V 5.2mm 5.2mm 50mA Round Button SPST-NO Surface Mount,Vertical SMD-4P,5.2x5.2mm Tactile Switches ROHSALPSALPINETactile Switches
README
README.mdEightu
These are stagger & ortho pcbs for the Eightu by @obobobobo! Eightu is a 13.25u 40% keyboard. It features an island spacebar with 8u spacebar support (and many different bottom row options), usbc daughterboard, arrow cluster, 7degree typing angle, tadpole mount, m4 screws and big bezels.
Please beware!!! The staggered pcb has been fully tested and is working. The ortho version has not been fully tested.
Layout
- Stagger
- Ortho
Pictures
(renders are not up to date regarding Keylayouts, refer to KLEs above)
Disclaimer
This PCB has been fully tested and is confirmed to work. However, no-one involved in this project is responsible for any usage issues that may arise. Order at your own risk. Feel free to edit, modify and otherwise utilise these files.
License
Shield: 
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Credits
Any questions, contact Calvin0563 on Discord.
Parts
141| Qty | Value | Footprint | References |
|---|---|---|---|
| 52 | MX_SW_solder | PCM_marbastlib-mx:SW_MX_1u | MX1, MX2, MX10, MX11, MX12, MX13, MX14, MX15, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX23 +36 |
| 51 | D_Small | Diode_SMD:D_SOD-123F | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +35 |
| 6 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C5, C7 |
| 6 | RotaryEncoder_Switch | PCM_marbastlib-various:ROT_Alps_EC11E-Switch | SW1, SW2, SW3, SW4, SW5, SW7 |
| 3 | LOGO | LOGO | G***, G***, G*** |
| 3 | MX_SW_solder | PCM_marbastlib-mx:SW_MX_1.5u | MX41, MX42, MX46 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric | C8, C9 |
| 2 | 2U | PCM_marbastlib-mx:STAB_MX_P_2u | S1, S2 |
| 2 | 3U | PCM_marbastlib-mx:STAB_MX_P_3u | S7, S8 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 2U | PCM_marbastlib-mx:STAB_MX_P_2.25u | S10 |
| 1 | 2U | PCM_marbastlib-mx:STAB_MX_P_2.75u | S9 |
| 1 | 4U | PCM_marbastlib-mx:STAB_MX_P_4u | S5 |
| 1 | 6U | PCM_marbastlib-mx:STAB_MX_P_6u | S4 |
| 1 | 7U | PCM_marbastlib-mx:STAB_MX_P_7u | S3 |
| 1 | 8U | PCM_marbastlib-mx:STAB_MX_P_8u | S6 |
| 1 | JST SH | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J1 |
| 1 | MX_SW_solder | PCM_marbastlib-mx:SW_MX_1.75u | MX37 |
| 1 | Pico EZmate | Connector_Molex:Molex_Pico-EZmate_78171-0004_1x04-1MP_P1.20mm_Vertical | J2 |
| 1 | SKQGABE010 | PCM_marbastlib-various:SW_SPST_SKQG_WithStem | SW6 |
| 1 | STM32F072CBT6 | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | XC6206PxxxMR-Regulator_Linear | Package_TO_SOT_SMD:SOT-23 | U2 |
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Questions
How big is the Eightu Ortho PCB?
It measures 250.9 × 79.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Eightu Ortho use?
141 parts, built around the STM32F072CBT6 and SKQGABE010. 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 Eightu Ortho KiCad files?
From the calvin-mcd/Eightu repository on GitHub, at the commit this page was made from: the board is Project/Eightu Ortho.kicad_pcb and its schematic Project/Eightu Ortho.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Eightu Ortho design in my own project?
Its repository states no licence, so its author keeps all rights: ask calvin-mcd before reusing the design.