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GSwitch LOOP8 - 8x true bypass relaisloop

MarkWestbroek·MusicBrain·hardware/schematics/gswitch-loop8/gswitch-loop8.kicad_pcb

GSwitch LOOP8 - 8x true bypass relaisloop PCB layout, top view — open source board by MarkWestbroek

About the GSwitch LOOP8 - 8x true bypass relaisloop PCB

GSwitch LOOP8 - 8x true bypass relaisloop is an open source PCB design by MarkWestbroek, published on GitHub under the MIT license. It is a 2-layer board measuring 200 × 58 mm, with 71 components from 35 distinct parts.

Other key parts include the 74HC595, R-78E5.0-1.0, AMS1117-3.3, 74HC154 and 74HC165. By type, the board carries 33 resistors, 16 connectors, 8 relays, 7 capacitors, 5 ICs and 2 diodes.

It belongs with the audio designs in this gallery.

From the project

A central brain running on teensy or a lighter MCU to process any control signals (MIDI, CV, our own) into the same but adding logic, ADSRs, DCOs, CV matrices etc. to it

Status: rev 0.1 geroute — ERC 0, netcheck OK, DRC 0/0 (2026-07-12). Nog niet bestellen: eerst ACJS-MHD-sample doorpiepen (T–TN) én LCSC-matching/fab-pakket maken (makefab.sh + jlcfix.py). Leidende spec: doc/guitar-switcher-spec.md.

(Regenereren: python hardware/kicad-generators/boardoverview.py gswitch-loop8-overzicht.json — 3D-render via kicad-cli met callouts in bord-mm.)*

Main components on the GSwitch LOOP8 - 8x true bypass relaisloop

74HC595R-78E5.0-1.0AMS1117-3.374HC15474HC165

GSwitch LOOP8 - 8x true bypass relaisloop bill of materials (BOM)

71 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
74HC595
U1
1
R-78E5.0-1.0
74HC14
U2
1
AMS1117-3.3
74HC14
U3
1
74HC154
ULN2803A
U4
1
74HC165
AMS1117-5.0
U5
2
C22373917
RJ45-S
J1, J2
1
C22373917
CHAIN-LINK-IN
J3
1
C22373917
CHAIN-LINK-UIT
J4
1
C22373917
AUDIO-LINK-IN
J5
1
C22373917
AUDIO-LINK-UIT
J6
2
C5665
ACJS-MH
J7, J8
1
C225484
ACJS-MHD
J11
2
C124378
ACJS-MHD
J12, J16
3
C49257
ACJS-MHD
J13, J14, J15
1
C492424
ACJS-MHD
J17
1
C124375
ACJS-MHD
J18
8
EE2-12NU/TQ2SA-12V
K1, K2, K3, K4, K5, K6, K7, K8
1
1N4148WS
SMAJ15A
D1
1
1N4148WS
LED-GN
D2
1
10U
100u/25V
C1
Show 15 more
QtyPartRefs
3
100N
100n
C2, C4, C6
1
10U
10u
C3
2
10U
100n
C5, C7
4
33R
1M
R1, R2, R11, R16
2
2K2
1M
R3, R4
3
10K
1M
R5, R13, R33
2
220R
1M
R6, R7
2
1M
R8, R9
1
10R
1M
R10
1
120R
1M
R12
2
100K
1M
R14, R15
4
33R
100R
R17, R18, R19, R20
6
100K
100R
R21, R22, R23, R24, R25, R26
5
100K
100k
R27, R28, R29, R30, R31
1
100K
4k7
R32

GSwitch LOOP8 - 8x true bypass relaisloop design files

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

GSwitch LOOP8 - 8x true bypass relaisloop: common questions

How big is the GSwitch LOOP8 - 8x true bypass relaisloop PCB?

The GSwitch LOOP8 - 8x true bypass relaisloop measures 200 × 58 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the GSwitch LOOP8 - 8x true bypass relaisloop?

71 components, from 35 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 GSwitch LOOP8 - 8x true bypass relaisloop design files?

From the MarkWestbroek/MusicBrain 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 GSwitch LOOP8 - 8x true bypass relaisloop design in my own project?

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

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