HardLabs

MXKeys

velvia-fifty·AudioThings·Workshop/MXKeys/MXKeys.kicad_pcb

MXKeys PCB layout, top view — open source board by velvia-fifty
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About the MXKeys PCB

MXKeys is an open source PCB design by velvia-fifty, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 202.6 × 128.5 mm, with 164 components from 84 distinct parts.

Other key parts include the 4070, 4015 and 40106. By type, the board carries 52 resistors, 49 connectors, 16 diodes, 14 switches, 8 capacitors and 5 ICs.

It belongs with the audio designs in this gallery.

From the project

DIY audio-related projects of questionable quality and dubious utility; delivered in 30 minutes or less or the next one is free

When you download this as a ZIP open AudioThings.kicad_pro, this is a panopticon project that contains the main resources and exists to handle some references that are common. Apparently KiCad and I have some foundational disagreement on how to misuse their software; this is primarily because I'm ignorant, but also they have incorrect opinions.

Use Kicad to drill down into other projects.

MXKeys, from the project README
From the project README

Main components on the MXKeys

4070401540106

MXKeys bill of materials (BOM)

164 components, 84 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
4070
CD4066BM
U1
3
4015
CD4066BM
U2, U3, U4
1
40106
U7
1
B2B_CONN
OPT EURO
J2
1
Clock In
J3
16
Multiple
J4, J8, J9, J10, J41, J42, J43, J44 +8
1
Run In
J5
1
Reset In
J6
1
Arbirary In
J7
1
Trigger B-
J12
1
Trigger C
J13
1
Trigger C#
J15
1
Trigger D
J16
1
Trigger D#
J17
1
Trigger E
J18
1
Trigger F
J19
1
Trigger F#
J20
1
Trigger G
J21
1
Trigger G#
J22
1
Trigger A
J23
Show 64 more
QtyPartRefs
1
Trigger A#
J24
1
Trigger B
J25
1
Trigger C+
J26
1
Trigger C#+
J27
1
Trigger D+
J28
1
BMaj-
J29
1
Bm-
J30
1
CMaj
J31
1
Cm
J32
1
DMaj
J33
1
Dm
J34
1
EMaj
J35
1
Em
J36
1
FMaj
J37
1
Fm
J38
1
GMaj
J39
1
Gm
J40
1
C#
MX1
1
D
MX2
1
B-
MX3
1
C
MX4
1
F
MX5
1
F#
MX6
1
D#
MX7
1
E
MX8
1
A
MX9
1
A#
MX10
1
G
MX11
1
G#
MX12
1
C#+
MX13
1
D+
MX14
1
B
MX15
1
C+
MX16
1
Clock
MX17
1
Run
MX18
1
Reset
MX19
1
Arbitrary
MX20
4
Trigger Direction
SW6, SW9, SW13, SW14
4
Mode
SW7, SW17, SW18, SW19
2
Clock Invert
SW8, SW10
1
Run Manual
SW11
1
Run Mode
SW12
1
Reset Invert
SW15
1
Arbitrary Invert
SW16
2
1N4148WS
1N4148W
D1, D2
4
Rise
D3, D5, D9, D13
4
Fall
D4, D7, D11, D15
6
1N4148W
D6, D8, D10, D12, D14, D16
1
1uF
C1
1
0.01uF Disc
C2
1
100P
1uF
C3
3
100N
0.01uF Disc
C4, C6, C7
2
100N
1uF
C5, C8
1
100K
1k
R1
1
10K
10k
R2
1
10K
100k
R3
1
33K
100k
R4
1
10K
1k
R5
1
47K
100k
R6
18
1k
R7, R8, R11, R14, R17, R19, R22, R23 +10
8
2.7k
R9, R12, R18, R24, R31, R37, R42, R48
8
2.2k
R10, R13, R20, R25, R33, R38, R44, R49
3
10k
R15, R28, R52
9
100k
R16, R21, R26, R29, R34, R39, R40, R45 +1

MXKeys design files

The KiCad project lives in the velvia-fifty/AudioThings repository on GitHub; these links point at the commit this page was built from.

MXKeys: common questions

How big is the MXKeys PCB?

The MXKeys measures 202.6 × 128.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MXKeys?

164 components, from 84 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 MXKeys design files?

From the velvia-fifty/AudioThings 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 MXKeys design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

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