HardLabs

Mainboard

matgla·mspc·mainboard/mainboard/mainboard.kicad_pcb

Mainboard PCB layout, top view — open source RP2040/RP2350 board by matgla

About the Mainboard PCB

Mainboard is an open source RP2040/RP2350 PCB design by matgla, published on GitHub under the MIT license. It is a 4-layer board measuring 100 × 100 mm, with 124 components from 50 distinct parts.

Its main chip is the RP2350_80QFN, from the RP2040/RP2350 family. Other key parts include the SN74HCS151PWR, AP2210, LD1117S50TR_SOT223, TLV320DAC3203IRGET and BD9D321EFJ. By type, the board carries 57 capacitors, 26 resistors, 15 connectors, 11 ICs, 10 diodes and 3 inductors.

It belongs with the usb & debug tools designs in this gallery.

From the project

Repository for MSPC hardware design

Hardware for MSPC: a small modular computer built from a mainboard and extension cards that plug into the MSPC bus. The mainboard runs yasos.

Every board is a KiCad project with its fabrication outputs next to it in outputs/.

- The projects are in KiCad 8 format. Newer KiCad versions upgrade them on the first save, and the result no longer opens in KiCad 8. Do such an upgrade as its own commit, with no design changes, so later diffs stay readable. - Schematic PDFs (outputs/schematic.pdf) are tracked, so the schematics can be read without KiCad. Gerbers and drill files are not: plot them…

Main components on the Mainboard

SN74HCS151PWRAP2210LD1117S50TR_SOT223TLV320DAC3203IRGETBD9D321EFJhs8836aSN74LVC139APWRW25Q128JVSRP2350_80QFN

Mainboard bill of materials (BOM)

124 components, 50 distinct parts.

QtyPartRefs
1
SN74HCS151PWR
IC1
1
AP2210
U1
1
LD1117S50TR_SOT223
U2
1
TLV320DAC3203IRGET
U4
2
BD9D321EFJ
U5, U6
1
hs8836a
U7
1
SN74LVC139APWR
U9
2
W25Q128JVS
U10, U12
1
RP2350_80QFN
U11
1
ECS-120-8-36-CGN-TR
Y1
2
Conn_01x02_Male
J1, J16
1
Barrel_Jack_Switch
J2
2
~
J3, J4
1
Conn_01x03_Male
J5
1
Micro_SD_Card
J6
1
Conn_01x04_Female
J7
2
Conn_01x03_Female
J8, J11
2
AudioJack4
J9, J10
1
Connector A 16-bit
J13
1
Connector A 8-bit
J14
Show 30 more
QtyPartRefs
1
Connector B 8-bit
J15
1
TestPoint
TP5
10
LESD5D5.0CT1G
D1, D2, D3, D4, D5, D6, D7, D8 +2
1
3.3u
L1
1
2.2u
L2
1
3.3u
L3
2
14p
C1, C2
25
100n
C3, C4, C6, C7, C8, C9, C10, C11 +17
7
4.7u
C5, C17, C41, C43, C71, C74, C75
5
1u
C15, C22, C29, C31, C60
1
2.2u
C18
1
10uF
C21
5
10u
C23, C24, C25, C26, C57
2
3300p
C30, C32
2
22p
C35, C36
4
22u
C37, C38, C39, C40
2
47u
C61, C62
1
10u
C66
2
1k
R1, R21
3
0
R3, R11, R12
10
10k
R4, R22, R23, R26, R27, R30, R31, R33 +2
1
120k
R5
1
3.3k
R6
2
22k
R7, R10
1
68k
R8
1
5.6k
R9
2
27.4R
R15, R16
1
100k
R19
1
4.7
R20
1
33
R25

Mainboard design files

The KiCad project lives in the matgla/mspc repository on GitHub; these links point at the commit this page was built from.

Mainboard: common questions

What microcontroller does the Mainboard use?

The Mainboard is built around the RP2350_80QFN, from the RP2040/RP2350 family.

How big is the Mainboard PCB?

The Mainboard measures 100 × 100 mm, has 4 copper layers and is 1.0198 mm thick.

How many components are on the Mainboard?

124 components, from 50 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mainboard design files?

From the matgla/mspc repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Mainboard design in my own project?

Yes, under the terms of its MIT license, which matgla chose for the repository.

Can I test firmware for the Mainboard without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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