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Mixer BACK

masl123·EurorackStereoMixer·Release/V1.0/Mixer_BACK.kicad_pcb

Mixer BACK PCB layout, top view — open source board by masl123

About the Mixer BACK PCB

Mixer BACK is an open source PCB design by masl123, published on GitHub under the TAPR-OHL-1.0 license. It is a 2-layer board measuring 60 × 102 mm, with 99 components from 17 distinct parts.

Other key parts include the TL074 and TL072. By type, the board carries 42 capacitors, 34 resistors, 15 connectors, 6 ICs and 2 diodes.

It belongs with the audio designs in this gallery.

From the project

A Stereo Mixer Module for Eurorack

This Eurorack module allows to mix stereo signals from up to 4 channels into one while also allowing to change the volume for each of the channels. The master volume can also be changed. By plugging a mono signal into the left input of a channel, the signal is mirrored to the right channel of the mixer. This allows for mixing mono and stereo signals.

The module consists of 2 PCBs and a Frontpanel.

Mixer BACK, from the project README
From the project README

Main components on the Mixer BACK

TL074TL072

Mixer BACK bill of materials (BOM)

99 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
4
TL074
U1, U2, U3, U4
2
TL072
U5, U6
2
Conn_01x06
J2, J17
10
Conn_01x02
J3, J4, J5, J6, J11, J18, J19, J20 +2
1
~
J13
2
Conn_01x03
J14, J28
2
1N5819
D1, D2
14
100n
C1, C2, C3, C4, C5, C6, C11, C12 +6
8
220n
C7, C8, C9, C10, C30, C31, C32, C33
8
47p
C13, C14, C15, C16, C34, C35, C36, C37
8
470n
C19, C20, C21, C22, C38, C39, C40, C41
2
220p
C25, C42
2
10u
C28, C29
8
10k
R1, R2, R3, R4, R19, R20, R21, R22
8
43k
R5, R6, R7, R8, R23, R24, R25, R26
8
1M
R9, R10, R11, R12, R27, R28, R29, R30
10
20k
R13, R14, R15, R16, R17, R31, R32, R33 +2

Mixer BACK design files

The KiCad project lives in the masl123/EurorackStereoMixer repository on GitHub; these links point at the commit this page was built from.

Mixer BACK: common questions

How big is the Mixer BACK PCB?

The Mixer BACK measures 60 × 102 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mixer BACK?

99 components, from 17 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 Mixer BACK design files?

From the masl123/EurorackStereoMixer repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Mixer BACK design in my own project?

Yes, under the terms of its TAPR-OHL-1.0 license, which masl123 chose for the repository.

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