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Multi midi

ReflexCreations·multi-midi·pcb/multi-midi/multi-midi.kicad_pcb

Multi midi PCB layout, top view — open source board by ReflexCreations
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About the Multi midi PCB

Multi midi is an open source PCB design by ReflexCreations, published on GitHub under the MIT license. It is a 2-layer board measuring 101.2 × 71.1 mm, with 59 components from 12 distinct parts.

Other key parts include the LM358 and 6N137. By type, the board carries 18 inductors, 18 resistors, 13 connectors, 6 capacitors, 3 ICs and 1 diode.

It belongs with the audio designs in this gallery.

From the project

(Hardware): A MIDI input box with buffered multiple outputs.

Multi-MIDI is a 1-to-8 or more MIDI thru box. This is definitely not a novel idea, but it's mainly for fun and to keep it cheap. Everything here was made with open source software and with the publicly available MIDI specifications.

All the files are available, so you can make your own. In brief, what you'll need to get the full thing:

- Have the circuit board manufactured; we usually used JLCPCB for this, who also can do assembly of the surface-mount components - Get all the components; if you went with assembly by JLCPCB, you only need to get the DIN-5 connectors, barrel jack, and 3-pin…

Multi midi, from the project README
From the project README

Main components on the Multi midi

LM3586N137

Multi midi bill of materials (BOM)

59 components, 12 distinct parts.

QtyPartRefs
2
LM358
U1, U2
1
6N137
U3
9
DIN-5_180degree
J1, J2, J3, J4, J5, J6, J7, J8 +1
2
Conn_01x04_Male
J10, J11
1
Barrel_Jack_Switch
J12
1
Conn_01x03_Male
J13
1
1N4148W
D1
18
SDFL2012S100KTF
L1, L2, L3, L4, L5, L6, L7, L8 +10
4
100n
C1, C2, C3, C4
2
47n
C5, C6
17
220
R1, R2, R3, R4, R5, R6, R7, R8 +9
1
10k
R26

Multi midi design files

The KiCad project lives in the ReflexCreations/multi-midi repository on GitHub; these links point at the commit this page was built from.

Multi midi: common questions

How big is the Multi midi PCB?

The Multi midi measures 101.2 × 71.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Multi midi?

59 components, from 12 distinct parts. The full bill of materials is listed on this page.

Where can I download the Multi midi design files?

From the ReflexCreations/multi-midi repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Multi midi design in my own project?

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

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