HardLabs

Pumper

wolf-yuan-6115·lightwolf·pumper/pumper.kicad_pcb

Pumper PCB layout, top view — open source RP2040/RP2350 board by wolf-yuan-6115

About the Pumper PCB

Pumper is an open source RP2040/RP2350 PCB design by wolf-yuan-6115, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 33.8 × 93.1 mm, with 90 components from 38 distinct parts.

Its main chip is the RP2354A-QFN60, from the RP2040/RP2350 family. Other key parts include the TLV76733DRVX, LM27762, ABM8-272-T3_C20625731, OPA1652AIDR and PCM5102A. By type, the board carries 45 capacitors, 24 resistors, 8 ICs, 5 diodes, 2 connectors and 2 switches.

It belongs with the audio designs in this gallery.

From the project

Pumper is an experimental RP2354-based USB Audio Class 2 DAC. The board uses a PCM5102A DAC with OPA1652 and OPA1622 analog stages in a compact design intended for learning about USB audio and DAC hardware.

Pumper is an experimental RP2354-based USB Audio Class 2 DAC. The board uses a PCM5102A DAC with OPA1652 and OPA1622 analog stages in a compact design intended for learning about USB audio and DAC hardware.

The firmware provides a ten-band parametric EQ, headphone crossfeed, output processing, USB host volume and mute, and persistent EQ profiles. Settings can be controlled from either the React WebHID controller or the native Android controller. Both controllers preview edits live and save persistent settings only through explicit save actions.

Pumper, from the project README
From the project README

Main components on the Pumper

TLV76733DRVXLM27762RP2354A-QFN60ABM8-272-T3_C20625731OPA1652AIDRPCM5102AOPA1622IDRCR

Pumper bill of materials (BOM)

90 components, 38 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
TLV76733DRVX
TLV76733DRVx
U1, U2
1
LM27762
U3
1
RP2354A-QFN60
U4
1
ABM8-272-T3_C20625731
U5
1
OPA1652AIDR
U6
1
PCM5102A
U7
1
OPA1622IDRCR
U8
1
C5178539
Connector, USB-TYPE-C-16P
J1
1
AUDIOJACK4
AudioJack4
J2
1
0603L075SLYR
F1
2
1TS015A-1400-0600-CT
SW1, SW2
1
RS6011DP6002
VR1
1
TPD2E001DZDR
D1
1
WS2812B
LED
D2
1
WS2812B
Yellow
Foshan NationStar Optoelectronics
D3
2
TPD1E10B06DPYR
D4, D5
1
C1002
~
Murata Electronics
FB1
1
AOTA-B201610S3R3-101-T
L1
3
1UF
1uF
Samsung Electro-Mechanics
C1, C4, C9
3
2.2UF
2.2uF
Samsung Electro-Mechanics
C2, C40, C44
Show 18 more
QtyPartRefs
19
100NF
100nF
Samsung Electro-Mechanics
C3, C12, C14, C15, C16, C17, C18, C19 +11
8
10UF
10uF
Samsung Electro-Mechanics
C5, C8, C30, C34, C36, C41, C45, C46
2
2.2UF
2.2uF
Samsung Electro-Mechanics
C6, C11
4
4.7UF
4.7uF
Samsung Electro-Mechanics
C7, C10, C13, C23
2
4.7UF
4.7uF
Samsung Electro-Mechanics
C24, C25
2
15PF
15pF
FH(Guangdong Fenghua Advanced Tech)
C26, C29
2
2.2NF
2.2nF
FH(Guangdong Fenghua Advanced Tech)
C38, C39
2
5.1kΩ
UNI-ROYAL(Uniroyal Elec)
R1, R2
2
330kΩ
UNI-ROYAL(Uniroyal Elec)
R3, R7
2
120kΩ
UNI-ROYAL(Uniroyal Elec)
R4, R6
1
10kΩ
UNI-ROYAL(Uniroyal Elec)
R5
9
1kΩ
UNI-ROYAL(Uniroyal Elec)
R8, R12, R13, R16, R17, R18, R19, R20 +1
1
33Ω
UNI-ROYAL(Uniroyal Elec)
R9
2
27Ω
UNI-ROYAL(Uniroyal Elec)
R10, R11
2
2kΩ
UNI-ROYAL(Uniroyal Elec)
R14, R15
1
47kΩ
UNI-ROYAL(Uniroyal Elec)
R22
1
180Ω
UNI-ROYAL(Uniroyal Elec)
R23
1
560Ω
UNI-ROYAL(Uniroyal Elec)
R24

Pumper design files

The KiCad project lives in the wolf-yuan-6115/lightwolf repository on GitHub; these links point at the commit this page was built from.

Pumper: common questions

What microcontroller does the Pumper use?

The Pumper is built around the RP2354A-QFN60, from the RP2040/RP2350 family.

How big is the Pumper PCB?

The Pumper measures 33.8 × 93.1 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Pumper?

90 components, from 38 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 Pumper design files?

From the wolf-yuan-6115/lightwolf 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 Pumper design in my own project?

Yes, under the terms of its GPL-3.0 license, which wolf-yuan-6115 chose for the repository.

Can I test firmware for the Pumper 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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