Marblewalrus backplane
About the Marblewalrus backplane PCB
Marblewalrus backplane is an open source PCB design by azonenberg, published on GitHub. It is a 4-layer board measuring 203.2 × 128.7 mm, with 189 components from 27 distinct parts.
Other key parts include the INA230, TPS259260, TCA6424A, LDO1117-33 and PCT2075TP. By type, the board carries 67 resistors, 60 capacitors, 26 ICs, 14 connectors, 8 diodes and 4 transistors.
From the project
The Antikernel operating system project
This is the new development repository for the Antikernel OS.
Eventually some of these TODOs will be broken down into tickets on the issue tracker. Need to work out some finer details on design first.
The legacy Splash build system is being completely rewritten and replaced. We'd love to write some developer documentation and formally specify the APIs for various existing components, as well as writing specifications for not-yet-implemented peripherals/drivers/services Fix the SARATOGA L1 cache so the miss servicing latency isn't so bad. Reduce hazards between SARATOGA execution units so we…
Main components on the Marblewalrus backplane
Marblewalrus backplane bill of materials (BOM)
189 components, 27 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 12 | INA230 | QFN_16_0.5MM_3x3MM | U1, U4, U11, U12, U13, U14, U15, U16 +4 |
| 10 | TPS259260 | DFN_10_0.5MM_3x3MM | U2, U3, U5, U6, U7, U8, U9, U10 +2 |
| 1 | TCA6424A | QFN_32_0.5MM_5x5MM | U22 |
| 1 | LDO1117-33 | SOT223-4 | U23 |
| 2 | PCT2075TP | DFN_8_0.5MM_3x3MM | U25, U26 |
| 4 | SSM6N58NU | DFN_6_0.65MM_2x2MM_GDS | Q1, Q2, Q3, Q4 |
| 8 | CONN_MW_COMPUTE_BACKPLANE | CONN_PCIE_X4_FCI_10018783_10201TLF | J1, J2, J3, J4, J5, J6, J7, J8 |
| 1 | CONN_MW_MGMT_BACKPLANE | CONN_PCIE_X16_FCI_10018783_10203TLF | J9 |
| 1 | CONN_MW_SWITCH_BACKPLANE | CONN_PCIE_X16_FCI_10018783_10203TLF | J10 |
| 1 | CONN_MW_12V | CONN_MW_12V_VERTICAL | J11 |
| 1 | CONN_MW_PSU_MGMT | CONN_RJ11_ASSMANN_A-2014-1-4-N-T-R | J12 |
| 2 | XILINX_JTAG | XILINX_JTAG_PTH_MOLEX_0878311420 | J13, J14 |
| 10 | M | MECHANICAL_EUROCARD_3U_BACKPLANE_SEG | MH1, MH2, MH3, MH4, MH5, MH6, MH7, MH8 +2 |
| 8 | GREEN | EIA_0603_LED | D1, D2, D3, D4, D5, D6, D7, D8 |
| 10 | 470 pF | EIA_0402_CAP_NOSILK | C1, C5, C13, C14, C15, C16, C17, C18 +2 |
| 20 | 4.7 uF 35V | EIA_1210_CAP_NOSILK | C2, C3, C4, C6, C7, C8, C9, C10 +12 |
| 16 | 0.1 uF | EIA_0402_CAP_NOSILK | C31, C32, C47, C48, C49, C50, C51, C52 +8 |
| 10 | 470 uF | CAP_AL_10MM_SMT | C33, C34, C35, C36, C37, C38, C39, C40 +2 |
| 2 | 4.7 uF | EIA_1210_CAP_NOSILK | C43, C44 |
| 2 | 4.7 uF | EIA_0603_CAP_NOSILK | C45, C46 |
Show 7 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 18 | 1K | EIA_0402_RES_NOSILK | R1, R2, R3, R4, R5, R6, R7, R8 +10 |
| 10 | 100K | EIA_0402_RES_NOSILK | R17, R19, R21, R22, R23, R24, R25, R26 +2 |
| 10 | 20 m | OHMITE_LVK12 | R18, R20, R27, R28, R29, R30, R31, R32 +2 |
| 1 | 2 m | OHMITE_LVK25 | R33 |
| 19 | 10K | EIA_0402_RES_NOSILK | R38, R39, R40, R41, R42, R43, R44, R45 +11 |
| 8 | 330 | EIA_0402_RES_NOSILK | R59, R60, R61, R62, R63, R64, R65, R66 |
| 1 | 50 m | OHMITE_LVK12 | R67 |
Marblewalrus backplane design files
The KiCad project lives in the azonenberg/antikernel repository on GitHub; these links point at the commit this page was built from.
Marblewalrus backplane: common questions
How big is the Marblewalrus backplane PCB?
The Marblewalrus backplane measures 203.2 × 128.7 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Marblewalrus backplane?
189 components, from 27 distinct parts. The full bill of materials is listed on this page.
Where can I download the Marblewalrus backplane design files?
From the azonenberg/antikernel repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Marblewalrus backplane design in my own project?
The repository has no license, so all rights stay with azonenberg. Use it as a reference, and ask the author before reusing the design.
