HardLabs

Eurorack-REV

cookiemonsternz·Eurorack-REV·hardware/rev/rev.kicad_pcb

Eurorack-REV PCB layout, top view — open source RP2040/RP2350 board by cookiemonsternz

About the Eurorack-REV PCB

Eurorack-REV is an open source RP2040/RP2350 PCB design by cookiemonsternz, published on GitHub. It is a 2-layer board measuring 29 × 100 mm, with 72 components from 32 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the AMS1117-3.3, W25Q128JVS, 74HC04 and TL072. By type, the board carries 33 capacitors, 18 resistors, 7 connectors, 6 ICs, 3 switches and 2 diodes.

It belongs with the audio designs in this gallery.

From the project

In terms of controls, REV features two potentiometers and 3 switches, which are by default configured to control reverb length and mix, with the switches adjusting brightness, density and stereo mixing.

In terms of controls, REV features two potentiometers and 3 switches, which are by default configured to control reverb length and mix, with the switches adjusting brightness, density and stereo mixing.

I personally decided to make it due to my frustration with constantly having to lug around my laptop whenever I wanted reverb on my synth (which doesn't have an in-built fx section). A eurorack module is much more convenient. Having it be my own hardware allows for much more customisation than off the shelf modules / pedals, which I find very attractive.

Eurorack-REV, from the project README
From the project README

Main components on the Eurorack-REV

AMS1117-3.3RP2040W25Q128JVS74HC04TL072

Eurorack-REV bill of materials (BOM)

72 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
AMS1117-3.3
U1, U4
1
RP2040
U2
1
W25Q128JVS
U3
1
74HC04
U5
1
TL072
U6
1
YSX321SL 12MHz Crystal
Y1
1
USB_B_Micro
J1
1
OUT_L
J2
1
OUT_R
J3
1
Conn_01x02
J4
1
IN_L
J5
1
IN_R
J6
1
Conn_02x08_Odd_Even
J10
2
100k
RV1, RV2
3
SW_SPDT
SW1, SW2, SW3
2
D_Schottky
D1, D2
2
10u
C1, C3
4
10u
C2, C5, C20, C22
2
22u
C4, C21
8
100n
C7, C8, C9, C10, C11, C12, C14, C15
Show 12 more
QtyPartRefs
2
1u
C13, C16
2
20p
C17, C18
1
100n
C19
10
100n
C23, C24, C26, C28, C29, C30, C31, C32 +2
2
47u
C25, C27
2
22
R1, R2
2
1k
R3, R4
2
220
R5, R6
2
100
R7, R8
4
1M
R9, R12, R15, R18
4
10k
R10, R13, R14, R16
2
3.9k
R11, R17

Eurorack-REV design files

The KiCad project lives in the cookiemonsternz/Eurorack-REV repository on GitHub; these links point at the commit this page was built from.

Eurorack-REV: common questions

What microcontroller does the Eurorack-REV use?

The Eurorack-REV is built around the RP2040, from the RP2040/RP2350 family.

How big is the Eurorack-REV PCB?

The Eurorack-REV measures 29 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Eurorack-REV?

72 components, from 32 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 Eurorack-REV design files?

From the cookiemonsternz/Eurorack-REV 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 Eurorack-REV design in my own project?

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

Can I test firmware for the Eurorack-REV 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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