GSwitch LOOP8-SH - 8x relaisloop compact (schroefklemmen)
About the GSwitch LOOP8-SH - 8x relaisloop compact (schroefklemmen) PCB
GSwitch LOOP8-SH - 8x relaisloop compact (schroefklemmen) is an open source PCB design by MarkWestbroek, published on GitHub under the MIT license. It is a 2-layer board measuring 150 × 44 mm, with 69 components from 36 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, 14 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 (2026-07-16). Nog niet bestellen: eerst LCSC-matching/fab-pakket maken (jlcfix.py, zie order-recept) en klemmen-type bevestigen. Leidende spec: doc/guitar-switcher-spec.md`.
(Regenereren: python hardware/kicad-generators/boardoverview.py gswitch-loop8sh-overzicht.json.)*
De compacte variant van gswitch-loop8: zelfde schakeling (8 DPDT-relaisloops, bypass op NC, RJ45-keten, 595 + ULN2803A), maar de acht ACJS-MHD-stapeljacks zijn vervangen door 3-polige schroefklemmen — de klant soldeert/klemt zijn eigen kabels. Audio-IN/UIT (J7/J8…
Main components on the GSwitch LOOP8-SH - 8x relaisloop compact (schroefklemmen)
GSwitch LOOP8-SH - 8x relaisloop compact (schroefklemmen) bill of materials (BOM)
69 components, 36 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HC595 | SOIC-16_3.9x9.9mm_P1.27mm | U1 |
| 1 | R-78E5.0-1.0 74HC14 | SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | AMS1117-3.3 74HC14 | SOIC-14_3.9x8.7mm_P1.27mm | U3 |
| 1 | 74HC154 ULN2803A | SOIC-18W_7.5x11.6mm_P1.27mm | U4 |
| 1 | 74HC165 AMS1117-5.0 | SOT-223-3_TabPin2 | U5 |
| 2 | C22373917 RJ45-S | RJ45_shielded | J1, J2 |
| 1 | C22373917 CHAIN-LINK-IN | PinHeader_2x04_P2.54mm_Vertical | J3 |
| 1 | C22373917 CHAIN-LINK-UIT | PinHeader_2x04_P2.54mm_Vertical | J4 |
| 2 | C5665 ACJS-MH | ACJS_MH | J7, J8 |
| 1 | C225484 LOOP1 | TerminalBlock_Phoenix_PT-1,5-3-3.5-H_1x03_P3.50mm_Horizontal | J11 |
| 1 | C124378 LOOP2 | TerminalBlock_Phoenix_PT-1,5-3-3.5-H_1x03_P3.50mm_Horizontal | J12 |
| 1 | C49257 LOOP3 | TerminalBlock_Phoenix_PT-1,5-3-3.5-H_1x03_P3.50mm_Horizontal | J13 |
| 1 | C49257 LOOP4 | TerminalBlock_Phoenix_PT-1,5-3-3.5-H_1x03_P3.50mm_Horizontal | J14 |
| 1 | C49257 LOOP5 | TerminalBlock_Phoenix_PT-1,5-3-3.5-H_1x03_P3.50mm_Horizontal | J15 |
| 1 | C124378 LOOP6 | TerminalBlock_Phoenix_PT-1,5-3-3.5-H_1x03_P3.50mm_Horizontal | J16 |
| 1 | C492424 LOOP7 | TerminalBlock_Phoenix_PT-1,5-3-3.5-H_1x03_P3.50mm_Horizontal | J17 |
| 1 | C124375 LOOP8 | TerminalBlock_Phoenix_PT-1,5-3-3.5-H_1x03_P3.50mm_Horizontal | J18 |
| 8 | EE2-12NU/TQ2SA-12V | Relay_DPDT_Kemet_EE2_NU | K1, K2, K3, K4, K5, K6, K7, K8 |
| 1 | 1N4148WS SMAJ15A | D_SMA | D1 |
| 1 | 1N4148WS LED-GN | LED_0805_2012Metric | D2 |
Show 16 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10U 100u/25V | CP_Elec_6.3x7.7 | C1 |
| 3 | 100N 100n | C_0805_2012Metric | C2, C4, C6 |
| 1 | 10U 10u | C_0805_2012Metric | C3 |
| 2 | 10U 100n | C_0805_2012Metric | C5, C7 |
| 4 | 33R 1M | R_0805_2012Metric | R1, R2, R11, R16 |
| 2 | 2K2 1M | R_0805_2012Metric | R3, R4 |
| 3 | 10K 1M | R_0805_2012Metric | R5, R13, R33 |
| 2 | 220R 1M | R_0805_2012Metric | R6, R7 |
| 2 | 1M | R_0805_2012Metric | R8, R9 |
| 1 | 10R 1M | R_0805_2012Metric | R10 |
| 1 | 120R 1M | R_0805_2012Metric | R12 |
| 2 | 100K 1M | R_0805_2012Metric | R14, R15 |
| 4 | 33R 100R | R_0805_2012Metric | R17, R18, R19, R20 |
| 6 | 100K 100R | R_0805_2012Metric | R21, R22, R23, R24, R25, R26 |
| 5 | 100K 100k | R_0805_2012Metric | R27, R28, R29, R30, R31 |
| 1 | 100K 4k7 | R_0805_2012Metric | R32 |
GSwitch LOOP8-SH - 8x relaisloop compact (schroefklemmen) 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-SH - 8x relaisloop compact (schroefklemmen): common questions
How big is the GSwitch LOOP8-SH - 8x relaisloop compact (schroefklemmen) PCB?
The GSwitch LOOP8-SH - 8x relaisloop compact (schroefklemmen) measures 150 × 44 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the GSwitch LOOP8-SH - 8x relaisloop compact (schroefklemmen)?
69 components, from 36 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-SH - 8x relaisloop compact (schroefklemmen) 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-SH - 8x relaisloop compact (schroefklemmen) design in my own project?
Yes, under the terms of its MIT license, which MarkWestbroek chose for the repository.
More boards in MusicBrain
MusicBrain VCF8-kern - 8x multimode VCF
110 × 92 mm412 parts4LMIT0
NXPMusicBrain SPI-busboard v2
200 × 115 mm88 parts2LMIT0
MusicBrain VCA8 - 8x VCA slot card
80 × 45 mm85 parts2LMIT0
GSwitch LOOP8 - 8x true bypass relaisloop
200 × 58 mm71 parts2LMIT0
ESP32GSwitch BRAIN - ESP32-S3 hoofdbord
100 × 70 mm65 parts2LMIT0
MusicBrain MATRIX - 8-stemmige audio patchmatrix
175 × 142 mm63 parts4LMIT0
Musicbrain matrix c
154 × 133 mm63 parts4LMIT0
ESP32MusicBrain AXON - ESP32-S3 netbridge
70 × 45 mm48 parts2LMIT0
MusicBrain GATEIN8 - 8x gate in slot card
50 × 45 mm32 parts2LMIT0
Minimal dac
90 × 90 mm14 parts4LMIT0
Quad dac
90 × 90 mm14 parts4LMIT0
Similar boards
KLOR
GEIGEIGEIST
160.2 × 118.3 mm79 parts2LGPL-3.01.2k
ButtonsLEDs
shanteacontrols
390 × 37 mm82 parts2LApache-2.0956
USB
52 × 12.6 mm6 parts2LApache-2.0956
Pots
390 × 93 mm75 parts2LApache-2.0956
PicoGUS Hand386
polpo
29.2 × 75.2 mm43 parts4LGPL-2.0800
Snark barker
schlae
231.1 × 106.7 mm193 parts2LNo license687