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Sidechain mixer core

shmoergh·moduleur·modules/03-sidechain-mixer/electronics/core/sidechain-mixer-core.kicad_pcb

Sidechain mixer core PCB layout, top view — open source board by shmoergh
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About the Sidechain mixer core PCB

Sidechain mixer core is an open source PCB design by shmoergh, published on GitHub. It is a 2-layer board measuring 58 × 65 mm, with 62 components from 25 distinct parts.

Other key parts include the TL072. By type, the board carries 26 resistors, 16 capacitors, 7 connectors, 4 ICs, 4 diodes and 1 transistor.

It belongs with the audio designs in this gallery.

From the project

Fully analog DIY-friendly modular synth

4 channel Eurorack compatible mixer with sidechain compressor.

- 4 input audio or CV mixer (DC coupled) - Channel 4 can be used as the control input for a VCA based sidechain compressor that acts on the output mix. Channel 4 can be individually added to the output mix or can remain silent, while the compressor still operates. - Gain control for channel 4 which allows to amplify line level signals to Eurorack level, allowing to mix external instruments with Eurorack sound sources - Dedicated output volume control - Separate core and UI PCBs for reusability and custom UI builds - Gerber files…

Sidechain mixer core, from the project README
From the project README

Main components on the Sidechain mixer core

TL072

Sidechain mixer core bill of materials (BOM)

62 components, 25 distinct parts — part numbers from the project's BOM.

QtyPartRefs
4
TL072
JLCPCB
U1, U2, U3, U4
1
BC847BS
JLCPCB
Q1
2
CONN_01X04
Conn_01x04
Mouser
J1, J6
1
CONN_02X05_ODD_EVEN
Conn_02x05_Odd_Even
Mouser
J2
1
CONN_02X05_ODD_EVEN
Conn_02x05_Odd_Even
Mouser
J3
1
CONN_01X02
Conn_01x02
Mouser
J4
1
CONN_02X03_ODD_EVEN
Conn_02x03_Odd_Even
Mouser
J5
1
CONN_01X06
Conn_01x06
Mouser
J8
2
10-100k
RV_ATTACK1, RV_RELEASE1
1
100k
RV_BIAS1
1
10k
RV_COMP1
2
1N4148
JLCPCB
D1, D2
2
1N5817
JLCPCB
D6, D7
8
100N
100n
JLCPCB
C1, C2, C3, C4, C5, C6, C7, C8
1
10U
10u
JLCPCB
C9
5
47P
47p
JLCPCB
C10, C11, C12, C13, C14
2
100U
100u
JLCPCB
C23, C24
11
100K
100k
JLCPCB
R1, R2, R3, R4, R5, R6, R7, R9 +3
1
220
JLCPCB
R8
1
1k
JLCPCB
R11
Show 5 more
QtyPartRefs
3
10K
10k
JLCPCB
R12, R21, R22
1
33K
33k
JLCPCB
R13
2
200K
200k
JLCPCB
R14, R15
5
10K
10k
Mouser
R18, R19, R26, R28, R29
2
470K
470k
JLCPCB
R23, R24

Sidechain mixer core design files

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

Sidechain mixer core: common questions

How big is the Sidechain mixer core PCB?

The Sidechain mixer core measures 58 × 65 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Sidechain mixer core?

62 components, from 25 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 Sidechain mixer core design files?

From the shmoergh/moduleur 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 Sidechain mixer core design in my own project?

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

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