HardLabs

Audio mixer

gridbugs·modular2·audio-mixer/audio-mixer.kicad_pcb

Audio mixer PCB layout, top view — open source board by gridbugs

About the Audio mixer PCB

Audio mixer is an open source PCB design by gridbugs, published on GitHub under the MIT license. It is a 2-layer board measuring 86.1 × 165.2 mm, with 87 components from 47 distinct parts.

Other key parts include the TL074. By type, the board carries 31 connectors, 18 resistors, 13 switches, 12 capacitors and 1 IC.

It belongs with the audio designs in this gallery.

From the project

A modular synthesizer, where modules are designed as close to bare PCBs as is practical/safe. This is the spiritual successor to the briefcase modular synthesizer.

Main components on the Audio mixer

TL074

Audio mixer bill of materials (BOM)

87 components, 47 distinct parts.

QtyPartRefs
1
TL074
U1
2
Input A1
J1, J14
3
Power
J2, J3, J4
2
Input B1
J5, J15
2
Input A2
J6, J16
2
Input B2
J7, J17
2
Input A3
J8, J18
2
Input B3
J9, J19
2
Output A
J10, J20
2
Output B
J11, J21
1
Conn_01x15_Socket
J12
1
AudioJack4
J13
1
Conn_01x15_Pin
J22
1
Conn_01x03_Pin
J23
2
Input A4
J24, J26
2
Input A5
J25, J27
2
Input B4
J28, J30
2
Input B5
J29, J31
1
100K - A1
RV1
1
100K - B1
RV2
Show 27 more
QtyPartRefs
1
100K - A3
RV3
1
100K - A2
RV4
1
100K - B3
RV5
1
100K - B2
RV6
1
100K - A
RV7
1
100K - B
RV8
1
100K - A4
RV9
1
100K - A5
RV10
1
100K - B4
RV11
1
100K - B5
RV12
1
Iso A1
SW1
1
Iso B1
SW2
1
Iso A2
SW3
1
Iso B2
SW4
1
Iso A3
SW5
1
Iso B3
SW6
1
Iso A
SW7
1
Iso B
SW8
1
Mono/Stereo
SW9
1
Iso A4
SW10
1
Iso A5
SW11
1
Iso B4
SW12
1
Iso B5
SW13
10
10uF
C1, C2, C3, C4, C6, C7, C9, C10 +2
2
100nF
C5, C8
14
100K
R1, R2, R3, R4, R5, R7, R8, R10 +6
4
1K
R6, R9, R13, R14

Audio mixer design files

The KiCad project lives in the gridbugs/modular2 repository on GitHub; these links point at the commit this page was built from.

Audio mixer: common questions

How big is the Audio mixer PCB?

The Audio mixer measures 86.1 × 165.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Audio mixer?

87 components, from 47 distinct parts. The full bill of materials is listed on this page.

Where can I download the Audio mixer design files?

From the gridbugs/modular2 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Audio mixer design in my own project?

Yes, under the terms of its MIT license, which gridbugs chose for the repository.

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