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Fosdem dual capture

FOSDEM·video·hardware/pcbs/fosdem-dual-capture/fosdem-dual-capture.kicad_pcb

Fosdem dual capture PCB layout, top view — open source RP2040/RP2350 board by FOSDEM

About the Fosdem dual capture PCB

Fosdem dual capture is an open source RP2040/RP2350 PCB design by FOSDEM, published on GitHub. It is a 4-layer board measuring 87.9 × 95.8 mm, with 211 components from 55 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the MS2131, TPS562231, MAX809S, PCM5100A and MS9601A. By type, the board carries 112 capacitors, 53 resistors, 21 ICs, 8 connectors, 8 inductors and 5 test points.

It belongs with the audio designs in this gallery.

From the project

A full build needs several parts. All of these should be easily reproducible, while for the ones where we rely on an external manufacturer, we made sure to have ample spares.

A full build needs several parts. All of these should be easily reproducible, while for the ones where we rely on an external manufacturer, we made sure to have ample spares.

You will need one of each item, except when stated otherwise.

The case is an off-the-shelf widely available 1U case, made by Gainta.

We only use the actual enclosure. All other bits can be discarded.

Main components on the Fosdem dual capture

MS2131TPS562231MAX809SPCM5100AMS9601ATPD4E02B04DQAUSB7252CW25Q128JVSRP2040

Fosdem dual capture bill of materials (BOM)

211 components, 55 distinct parts.

QtyPartRefs
2
MS2131
U1, U2
4
TPS562231
U3, U4, U5, U6
1
MAX809S
U7
1
PCM5100A
U8
1
MS9601A
U9
9
TPD4E02B04DQA
U10, U14, U15, U16, U17, U18, U19, U20 +1
1
USB7252C
U11
1
W25Q128JVS
U12
1
RP2040
U13
2
TSX-3225
Y1, Y2
1
12MHz
Y3
1
Radxa
J1
1
490-SJ1-3533NG
AudioJack3
J2
1
Output
J3
2
Input
J4, J6
1
USB3_A
J5
1
USB_C_Receptacle
J7
1
Debug
J8
1
SW_Push
SW1
1
1.1V
TP1
Show 35 more
QtyPartRefs
1
3.3V
TP2
1
Ground point
TP3
1
2.5V
TP4
1
1.8V
TP5
4
1.5uH
L1, L2, L3, L4
4
L_Ferrite_Small
L5, L6, L7, L8
6
885012107014
10uF
C1, C30, C32, C34, C40, C45
12
885012206126
100nF
C2, C8, C14, C15, C26, C43, C47, C48 +4
8
885012206126
10uF
C3, C4, C9, C10, C16, C17, C18, C19
12
885012206126
22uF
C5, C6, C7, C11, C12, C13, C20, C21 +4
4
27pF
C27, C28, C50, C51
2
885012107014
1uF
C29, C58
60
885012206046
100nF
C31, C33, C35, C41, C42, C44, C46, C57 +52
2
885012206036
2.2nF
C36, C37
2
885012106029
2.2uF
C38, C39
2
22pF
C55, C56
2
885012107014
4.7uF
C108, C110
4
4.7k
R1, R2, R4, R28
2
3.3k
R3, R12
2
4.99k
R5, R14
5
1k
R6, R18, R29, R30, R42
7
10k
R7, R11, R16, R17, R44, R47, R53
2
6.2k
R8, R13
4
1.6k
R9, R19, R21, R31
2
39k
R10, R15
2
200
R20, R32
2
1M
R22, R35
3
1k
R23, R40, R41
8
10k
R24, R25, R33, R34, R36, R37, R38, R39
2
560112116067
470
R26, R27
1
120k
R43
2
27.4
R45, R46
3
200k
R48, R49, R50
1
12k
R51
1
100k
R52

Fosdem dual capture design files

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

Fosdem dual capture: common questions

What microcontroller does the Fosdem dual capture use?

The Fosdem dual capture is built around the RP2040, from the RP2040/RP2350 family.

How big is the Fosdem dual capture PCB?

The Fosdem dual capture measures 87.9 × 95.8 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Fosdem dual capture?

211 components, from 55 distinct parts. The full bill of materials is listed on this page.

Where can I download the Fosdem dual capture design files?

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

Can I use the Fosdem dual capture design in my own project?

The repository has no license, so all rights stay with FOSDEM. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Fosdem dual capture 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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