4 layers144 × 78 mm
Controller mcu bu an 64 BIG PCB
Mo-MoS/controllers
Controllers for MIDI, USB, Software Synths, VST Plugins.
116 parts1
2 layers100 × 80 mm
Buttons matrix
Mo-MoS/controllers1Controllers for MIDI, USB, Software Synths, VST Plugins.
- Size
- 100 × 80 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 94
- Nets
- 90
- Pads
- 328
- Tracks, vias
- 735, 39
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 30 Sep 2025
- Updated
- 22 Sep 2026
Overview
Buttons matrix is an open-source printed circuit board by Mo-MoS, from the Mo-MoS/controllers repository on GitHub. It is a 2-layer board of 100 × 80 mm with 94 parts on 90 nets, routed with 735 tracks and 39 vias.
It is built around the 74HC138 and 74HC165D. Its parts include 64 diodes, 18 connectors, 8 resistors, 2 capacitors and 2 ICs. It belongs with the audio and music and lEDs and displays boards of this library.
Main components
2
74HC138
SOP-160℃~+70℃ 24ns@5.0V,16pF 2V~6V 3/8 5.2mA 5.2mA 5uA 74HC Decoder Reverse function Single Supply SOP-16 Signal Switches, Multiplexers, Decoders ROHSGRSignal Switches, Multiplexers, Decoders
74HC165D
SO-16-40℃~+125℃ 1 28ns@6V,50pF 2V~6V 35MHz 500mW 74HC 8 Parallel or Serial to Serial SOIC-16 Shift Registers ROHSNexperiaShift Registers
README
README.mdControllers
Description
Controllers for MIDI, USB, Software Synths, VST Plugins.
Pictures
PCB boards for the 14 knobs of S2-OSC:
Functional prototype of S2-OSC in a livestream:
Paper scribble for the S2-OSC frontplate:
Prototype in handmade PCB boards for S2-OSC:
Parts
94| Qty | Value | Footprint | References |
|---|---|---|---|
| 64 | 1N4148 | Diode_SMD:D_SOD-323 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +48 |
| 8 | 4K7 | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R5, R6, R7, R8 |
| 2 | 100n | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 1 | 74HC138 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U1 |
| 1 | 74HC165 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | B_Col_0_A | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J2 |
| 1 | B_Col_0_B | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J3 |
| 1 | B_Col_1_A | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J4 |
| 1 | B_Col_1_B | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J5 |
| 1 | B_Col_2_A | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J6 |
| 1 | B_Col_2_B | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J7 |
| 1 | B_Col_3_A | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J8 |
| 1 | B_Col_3_B | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J9 |
| 1 | B_Col_4_A | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J10 |
| 1 | B_Col_4_B | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J11 |
| 1 | B_Col_5_A | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J12 |
| 1 | B_Col_5_B | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J13 |
| 1 | B_Col_6_A | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J14 |
| 1 | B_Col_6_B | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J15 |
| 1 | B_Col_7_A | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J16 |
| 1 | B_Col_7_B | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J17 |
| 1 | to_button_matrix | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | J18 |
| 1 | to_rpi | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | J1 |
Questions
How big is the Buttons matrix PCB?
It measures 100 × 80 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Buttons matrix use?
94 parts, built around the 74HC138 and 74HC165D. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Buttons matrix KiCad files?
From the Mo-MoS/controllers repository on GitHub, at the commit this page was made from: the board is s2/kicad/buttons_matrix/buttons_matrix/buttons_matrix.kicad_pcb and its schematic s2/kicad/analog_mux/analog_mux/analog_mux.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Buttons matrix design in my own project?
Its repository states no licence, so its author keeps all rights: ask Mo-MoS before reusing the design.
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