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DMH Output PCB Mezanine

DeMarco·DMH-Output·DMH_Output_PCB_Mezanine/DMH_Output_PCB_Mezanine.kicad_pcb

DMH Output PCB Mezanine layout, top view — open source board by DeMarco
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About the DMH Output PCB Mezanine

DMH Output PCB Mezanine is an open source PCB design by DeMarco, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 49 × 164.5 mm, with 105 components from 23 distinct parts.

Other key parts include the TL072 and NE5532. By type, the board carries 48 resistors, 40 capacitors, 8 connectors and 7 ICs.

It belongs with the audio designs in this gallery.

From the project

Kosmo format output module

The L and R inputs accept the usual (Eurorack) modular synth audio amplitude of 10 V peak-to-peak. The line level L and R outputs accept both balanced TRS and unbalanced TS cables. The main volume control affects both L and R channels. The reduction factor can be set from from -infinite (silence) to -3 dB (max). Since the usual 10 Vpp amplitude corresponds to around +13 dBu, this means the module can output from -infinite up to +10 dBu. The precision dBu meter will max out at +6 dBu (red LED). Most professional audio equipment like mixers and audio interfaces expect a nominal input line level…

DMH Output PCB Mezanine, from the project README
From the project README

Main components on the DMH Output PCB Mezanine

TL072NE5532

DMH Output PCB Mezanine bill of materials (BOM)

105 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TL072
U7
6
NE5532
U9, U10, U16, U17, U18, U19
1
CONN_01X04_PINHEADER
Conn_01x04_PinHeader
J30
1
CONN_01X06_PINHEADER
Conn_01x06_PinHeader
J32
4
CONN_01X06
Conn_01x06
J33, J34, J37, J38
2
CONN_01X02_PINHEADER
Conn_01x02_PinHeader
J39, J40
2
1k
RV4, RV5
14
100NF
100nF
C3, C4, C39, C40, C45, C46, C49, C51 +6
12
47uF 35V
C7, C10, C22, C27, C28, C29, C31, C32 +4
6
100PF
100pF
C8, C9, C15, C18, C19, C35
4
22uF 35V
C16, C17, C20, C21
4
22pF
C25, C26, C30, C33
2
20K
20k
R26, R29
2
14K
14k
R27, R28
8
4K7
4k7
R34, R35, R40, R42, R96, R98, R112, R114
10
10K
10k
R36, R39, R68, R73, R93, R100, R101, R106 +2
4
75R
R37, R38, R41, R113
6
1k
R43, R67, R72, R103, R104, R111
4
100R
R60, R63, R70, R74
2
220K
220k
R61, R64
Show 3 more
QtyPartRefs
4
100K
100k
R62, R65, R69, R75
2
22K
22k
R66, R71
4
2k
R76, R77, R78, R79

DMH Output PCB Mezanine design files

The KiCad project lives in the DeMarco/DMH-Output repository on GitHub; these links point at the commit this page was built from.

DMH Output PCB Mezanine: common questions

How big is the DMH Output PCB Mezanine?

The DMH Output PCB Mezanine measures 49 × 164.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the DMH Output PCB Mezanine?

105 components, from 23 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 DMH Output PCB Mezanine design files?

From the DeMarco/DMH-Output 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 DMH Output PCB Mezanine design in my own project?

Yes, under the terms of its CC0-1.0 license, which DeMarco chose for the repository.

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