2 layers139.3 × 113.8 mm
Flake L
lever-tech/flake
An open-source, wireless, split ergonomic keyboard designed to be productive, healthy, and enjoyable. [formerly Anywhy Flake]
62 parts531CERN-OHL-W-2.0
2 layers180.3 × 130 mm
Hausrack test backplane
rebma-io/hausrackA wildly over-engineered home automation project
- Size
- 180.3 × 130 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 62
- Nets
- 17
- Pads
- 534
- Tracks, vias
- 107, 2
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 23 Apr 2024
- Updated
- 12 Aug 2025
Overview
Hausrack test backplane is an open-source printed circuit board by rebma-io, from the rebma-io/hausrack repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 180.3 × 130 mm with 62 parts on 17 nets, routed with 107 tracks and 2 vias.
Its parts include 10 connectors and 2 resistors.
README
hardware/pcb/backplane/README.mdHAUSRACK Test Backplane
More details on the update.
Design Principles
When I was looking at how kha structured the bus, I decided to pull a few ideas from what they did:
- Leverage DIN 41612 for the physical format of the bus. This is a very well understood and documented specification, and it has been battle-tested over many decades.
- Simplify the backplane routing requirement.
- Carry both +12V and +5V. Can be locally regulated down to the needed voltage.
Physical Connector
I decided to use the DIN 41612 connector because it is an absolute tank. It has been used, at least, since the late 1980s in dozens and dozens of critical systems. It's also relatively inexpensive and not very finicky to work with.
Parts
62| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1, TP2, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22, TP23 +16 |
| 14 | MountingHole | MountingHole:MountingHole_2.7mm_M2.5_DIN965 | H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12, H13, H14 |
| 7 | DIN41612_02x32_AB | Connector_DIN:DIN41612_B_2x32_Female_Vertical_THT | J1, J2, J3, J4, J5, J6, J7 |
| 2 | 0R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | Conn_01x01_Socket | Connector:Banana_Cliff_FCR7350B_S16N-PC_Horizontal | J8, J9 |
| 1 | CAN_SHLD | TestPoint:TestPoint_Loop_D2.54mm_Drill1.5mm_Beaded | TP34 |
| 1 | GND | TestPoint:TestPoint_Loop_D2.54mm_Drill1.5mm_Beaded | TP33 |
| 1 | MJ3221-88-0_REVA | rebma_io:GCT_MJ3221-88-0_REVA | J10 |
The 60 most common of 62 parts.
Questions
How big is the Hausrack test backplane PCB?
It measures 180.3 × 130 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hausrack test backplane use?
62 parts. 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 Hausrack test backplane KiCad files?
From the rebma-io/hausrack repository on GitHub, at the commit this page was made from: the board is hardware/pcb/backplane/hausrack_test_backplane.kicad_pcb and its schematic hardware/pcb/backplane/hausrack_test_backplane.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hausrack test backplane 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).
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