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Summing mixer jacks

pythagorean-comma·summing-mixer·summing-mixer-jacks/summing-mixer-jacks.kicad_pcb

Summing mixer jacks PCB layout, top view — open source board by pythagorean-comma

About the Summing mixer jacks PCB

Summing mixer jacks is an open source PCB design by pythagorean-comma, published on GitHub. It is a 2-layer board measuring 25.5 × 107.8 mm, with 21 components from 11 distinct parts.

By type, the board carries 8 connectors, 7 resistors and 6 capacitors.

It belongs with the audio designs in this gallery.

From the project

A six-channel active summing mixer in a pedal enclosure: three TRS inputs from a Cycfi Nexus-GK, one mono 1/4" output, generated from source rather than drawn by hand.

A six-channel active summing mixer in a pedal enclosure: three TRS inputs from a Cycfi Nexus-GK, one mono 1/4" output, generated from source rather than drawn by hand.

The Nexus has no mono sum — twelve channels on six TRS jacks, MIDI, and a 13-pin Roland DIN, with the GK module's MIX SW explicitly excluded. This fills that gap for the six Cycfi Nu capsules on a viola da gamba whose piezo side is rmc-pizz-arco and whose Nu wiring is cycfi-nu-hub.

Summing mixer jacks bill of materials (BOM)

21 components, 11 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
NSJ12HF-1
IN/THRU 1/2
J1
1
NSJ12HF-1
IN/THRU 3/4
J2
1
NSJ12HF-1
IN/THRU 5/6
J3
1
NRJ4HF-1
OUT
J4
1
61300511121
TO MAIN 1/2
J10
1
61300511121
TO MAIN 3/4
J12
1
61300511121
TO MAIN 5/6
J14
1
61300311121
OUT
J16
6
GRM3195C1H221JA01D
220p/50V C0G
C104, C204, C304, C404, C504, C604
6
RC1206FR-071KL
1k
R103, R203, R303, R403, R503, R603
1
RC1206FR-071ML
1M
R706

Summing mixer jacks design files

The KiCad project lives in the pythagorean-comma/summing-mixer repository on GitHub; these links point at the commit this page was built from.

Summing mixer jacks: common questions

How big is the Summing mixer jacks PCB?

The Summing mixer jacks measures 25.5 × 107.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Summing mixer jacks?

21 components, from 11 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 Summing mixer jacks design files?

From the pythagorean-comma/summing-mixer 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 Summing mixer jacks design in my own project?

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

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