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HDD Synth Prototype MK4

MaverickUK·HDDSynth·2_prototype_mk4/hardware/HDD Synth Prototype MK4.kicad_pcb

HDD Synth Prototype MK4 PCB layout, top view — open source RP2040/RP2350 board by MaverickUK
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About the HDD Synth Prototype MK4 PCB

HDD Synth Prototype MK4 is an open source RP2040/RP2350 PCB design by MaverickUK, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 100.3 × 69.9 mm, with 40 components from 33 distinct parts.

Its main chip is the RASPBERRYPI_PICO2, from the RP2040/RP2350 family. Other key parts include the MAX98357AETE+T and EL357N(C)(TA)-VG. By type, the board carries 9 capacitors, 8 resistors, 7 connectors, 4 diodes, 2 ICs and 2 inductors.

It belongs with the audio, retro computing and displays & leds designs in this gallery.

From the project

Recreate the sound of mechanical spinning HDDs on retro PCs that use a solid state drive

Inspired by seeing the HDD Clicker project and wanting to more faithfully recreate the sound of old mechanical hard drives spinning up and accessing data. Because the hard drive sounds come from samples, it's possible to replace them with any hard drive recording you'd like or something completely different!

- Sample based recreation of mechanical hard disk drives operating sounds - Spin up when PC is turned on - Idle hum whilst standing by - Access clicks and crackcles - Spin down when PC is turned off - SD card to hold multiple HDD sample packs, to recreate the sound of different…

HDD Synth Prototype MK4, from the project README
From the project README

Main components on the HDD Synth Prototype MK4

MAX98357AETE+TEL357N(C)(TA)-VGRASPBERRYPI_PICO2

HDD Synth Prototype MK4 bill of materials (BOM)

40 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MAX98357AETE+T
MAX98357A
Analog Devices
U1
1
EL357N(C)(TA)-VG
Optocoupler_DC_PhotoNPN_AKEC
Everlight
U2
1
RASPBERRYPI_PICO2
RaspberryPi_Pico2
A1
1
MMBT3904
Q1
1
DM3D-SF
Micro_SD_Card
Hirose Electric
J1
1
CONN_02X20_ODD_EVEN
Conn_02x20_Odd_Even
J3
1
1734451-1
J4
1
CONN_01X03_PIN
Conn_01x03_Pin
J5
1
171825-4
J6
1
CONN_01X04_PIN
Conn_01x04_Pin
J7
1
CONN_01X05
Conn_01x05
J8
1
1984617
Conn_01x02
Phoenix Contact
H1
3
CONN_01X02
Conn_01x02
H2, H4, H8
1
Conn_01x02
H9
1
1F
Super_Cap3
1
SS14
D1
1
BAT43W
D2
1
WS2812B
D3
1
SS12
onsemi / Taiwan Semi
D4
2
BLM21PG221SN1D
FerriteBead_Small
FB1, FB2
Show 13 more
QtyPartRefs
3
CL10B104KO8NNNC
0.1uF
C1, C6, C11
2
CL31A106KAHNNNE
10uF
C2, C5
2
0603B102K500NT
1nF
C3, C4
1
CL31A106KAHNNNE
0.1uF
C7
1
CL10B104KO8NNNC
10uF
C8
1
RC0603FR-071KL
1K
R1
1
RC0603FR-072KL
2K
R2
1
4.7K
R3
1
RC0603FR-0733RL
33R
R4
1
RC0603FR-07330RL
330R
R5
1
4.7K
R7
1
10K
R8
1
YC164-JR-0747KL
47K
RN1

HDD Synth Prototype MK4 design files

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

HDD Synth Prototype MK4: common questions

What microcontroller does the HDD Synth Prototype MK4 use?

The HDD Synth Prototype MK4 is built around the RASPBERRYPI_PICO2, from the RP2040/RP2350 family.

How big is the HDD Synth Prototype MK4 PCB?

The HDD Synth Prototype MK4 measures 100.3 × 69.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the HDD Synth Prototype MK4?

40 components, from 33 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 HDD Synth Prototype MK4 design files?

From the MaverickUK/HDDSynth 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 HDD Synth Prototype MK4 design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the HDD Synth Prototype MK4 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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