Buffered-Mult
About the Buffered-Mult PCB
Buffered-Mult is an open source PCB design by domesticmouse, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 30 × 110 mm, with 53 components from 21 distinct parts.
Other key parts include the TL074. By type, the board carries 18 resistors, 13 connectors, 11 capacitors, 8 diodes and 3 ICs.
It belongs with the audio designs in this gallery.
From the project
A buffered mult circuit
A 3-channel active buffered mult (multiple) circuit designed for Eurorack modular synthesizers. View this in KiCanvas.
In modular synthesis, a multiple is used to split a single signal (such as control voltage, gates/triggers, or audio) and route it to multiple destinations simultaneously.
While passive multiples simply wire jacks together in parallel, they cause voltage droop when splitting precise voltages like 1V/Octave pitch CV across multiple inputs due to impedance loading. This results in out-of-tune oscillators and pitch tracking errors.
Main components on the Buffered-Mult
Buffered-Mult bill of materials (BOM)
53 components, 21 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | TL074 | SOIC-14_3.9x8.7mm_P1.27mm | U1, U2, U3 |
| 1 | Eurorack PWR | IDC-Header_2x05_P2.54mm_Vertical | J1 |
| 1 | INPUT1 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J2 |
| 1 | INPUT2 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J3 |
| 1 | INPUT3 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J4 |
| 1 | OUTPUT1-1 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J5 |
| 1 | OUTPUT1-2 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J6 |
| 1 | OUTPUT1-3 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J7 |
| 1 | OUTPUT2-1 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J8 |
| 1 | OUTPUT2-2 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J9 |
| 1 | OUTPUT2-3 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J10 |
| 1 | OUTPUT3-1 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J11 |
| 1 | OUTPUT3-2 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J12 |
| 1 | OUTPUT3-3 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J13 |
| 6 | LED | LED_D3.0mm_FlatTop | D1, D2, D3, D4, D5, D6 |
| 2 | C2480 D_Schottky | D_SMA_Handsoldering | D7, D8 |
| 6 | 100NF 100nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2, C3, C4, C5, C6 |
| 2 | 10UF/25V 10uF/25V | CP_Elec_5x5.4 | C7, C8 |
| 3 | 100PF 100pF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C9, C10, C11 |
| 3 | 100K | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R3 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 15 | 1k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R5, R6, R7, R8, R9, R10, R11 +7 |
Buffered-Mult design files
The KiCad project lives in the domesticmouse/Buffered-Mult repository on GitHub; these links point at the commit this page was built from.
Buffered-Mult: common questions
How big is the Buffered-Mult PCB?
The Buffered-Mult measures 30 × 110 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Buffered-Mult?
53 components, from 21 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 Buffered-Mult design files?
From the domesticmouse/Buffered-Mult 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 Buffered-Mult design in my own project?
Yes, under the terms of its Apache-2.0 license, which domesticmouse chose for the repository.
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