Masonry
About the Masonry PCB
Masonry is an open source STM32 PCB design by dcpedit, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 228.6 × 86.5 mm, with 113 components from 20 distinct parts.
Its main chip is the STM32F072C8TX, from the STM32 family. Other key parts include the USBLC6-2SC6 and XC6206PXXXMR-REGULATOR_LINEAR. By type, the board carries 44 diodes, 10 capacitors, 3 ICs, 3 resistors, 2 switches and 1 connector.
It belongs with the keyboards designs in this gallery.
From the project
Ergonomic columnar 40% keyboard based of Bruce the Keyboard
Inspired by Bruce the Keyboard, this is a 12 column version with a less aggressive stagger.
Schematic for the STM32F072 integration was taken from Sleepdealer's OSFRL project
Here are the supported layouts: Keyboard Layout Editor
The files needed for https://jlcpcb.com are located in the production folder:
Once pcb.zip has been uploaded, you can continue with the selected default options. You can optionally change the solder mask color, which changes the final color of your PCB.
Main components on the Masonry
Masonry bill of materials (BOM)
113 components, 20 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | USBLC6-2SC6 | SOT-23-6 | U1 |
| 1 | STM32F072C8TX STM32F072C8Tx | LQFP-48_7x7mm_P0.5mm | U2 |
| 1 | XC6206PXXXMR-REGULATOR_LINEAR XC6206PxxxMR-Regulator_Linear | SOT-23 | U3 |
| 1 | USB_C_RECEPTACLE_USB2.0 USB_C_Receptacle_USB2.0 | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | 500MA 500mA | Fuse_1206_3216Metric | F1 |
| 1 | — | H2 | |
| 4 | ~ | MXOnly-1.75U-Hotswap-Vertical | MX00, MX25, MX45, MX60 |
| 8 | ~ | MXOnly-1.25U-Hotswap-Vertical | MX01, MX02, MX03, MX24, MX42, MX43, MX44, MX61 |
| 28 | ~ | MXOnly-1U-Hotswap | MX04, MX10, MX11, MX12, MX13, MX14, MX15, MX21 +20 |
| 4 | ~ | MXOnly-1.5U-Hotswap-Vertical | MX05, MX20, MX40, MX65 |
| 1 | ~ | MXOnly-2U-Hotswap-ReversedVerticalStabilizers | MX21.2 |
| 2 | ~ | MXOnly-2U-Hotswap | MX33.2, MX72.2 |
| 1 | ~ | MXOnly-2U-Hotswap-VerticalStabilizers | MX64.2 |
| 2 | C318884 RST | SW_SPST_SKQG_WithoutStem | SW1, SW2 |
| 44 | 1N4148 1n4148 | D_SOD123 | D1, D2, D3, D4, D5, D6, D7, D8 +36 |
| 6 | 100NF 100nF | C_0402_1005Metric | C1, C4, C5, C6, C7, C8 |
| 1 | 4.7UF 4.7uF | C_0402_1005Metric | C2 |
| 3 | 1UF 1uF | C_0402_1005Metric | C3, C9, C10 |
| 1 | 10K 10k | R_0402_1005Metric | R1 |
| 2 | 5K1 5k1 | R_0402_1005Metric | R2, R3 |
Masonry design files
The KiCad project lives in the dcpedit/masonry repository on GitHub; these links point at the commit this page was built from.
Masonry: common questions
What microcontroller does the Masonry use?
The Masonry is built around the STM32F072C8TX, from the STM32 family.
How big is the Masonry PCB?
The Masonry measures 228.6 × 86.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Masonry?
113 components, from 20 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Masonry design files?
From the dcpedit/masonry repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Masonry design in my own project?
Yes, under the terms of its CC-BY-4.0 license, which dcpedit chose for the repository.
Can I test firmware for the Masonry without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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