

MCB-1
This is a rebuild of the MCB-1 for anybody who has the sound card it connects to.
- Size
- 195.6 × 35.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 29
- Pads
- 177
- Tracks, vias
- 160, 60
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 20 Sep 2021
- Updated
- 20 Sep 2021
Overview
MCB-1 is an open-source printed circuit board by peon374, from the peon374/MCB-1 repository on GitHub. It is a 2-layer board of 195.6 × 35.6 mm with 34 parts on 29 nets, routed with 160 tracks and 60 vias.
It is built around the 74LS05P-E and H11L3. Its parts include 14 resistors, 9 connectors, 2 capacitors, 2 ICs and 1 diode. It belongs with the audio and music boards of this library.
Main components
2README
README.mdMCB-1
This is a rebuild of the MCB-1 for anybody who has the sound card it connects to. I will improve the documentation around assembly once I have made one of the boards. Until the docs improve assume it is a work in progress. I will save gerbers in releases setup for JLCPCB. This board is entirely through hole design so should be easy to assemble.
TODO
- Layout rev0.1
- Make a board and get it tested
- Paint the Neutrik 6.5mm socket model
- Add an assembly and debugging guide

There have been a few modifications to improve availability of parts and reliability of operation.

Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 220 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R1, R2, R5, R7, R8, R12, R13 |
| 6 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4, H5, H6 |
| 3 | 100 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R3, R4, R6 |
| 3 | 4.7K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R9, R10, R11 |
| 3 | MIDI_OUT | MCB1:SWITCHCRAFT_57PC5FS | J2, J4, J5 |
| 2 | 100nF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2 |
| 1 | 1N4148 | Diode_THT:D_DO-35_SOD27_P3.81mm_Vertical_AnodeUp | D1 |
| 1 | 74LS05 | Package_DIP:DIP-14_W7.62mm | U1 |
| 1 | Conn_01x12 | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Vertical | J10 |
| 1 | DNF | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R15 |
| 1 | H11L3 | Package_DIP:DIP-6_W7.62mm | U3 |
| 1 | METRONOME | Connector_Audio:Jack_6.35mm_Neutrik_NMJ4HFD3_Horizontal | J8 |
| 1 | MIDI_IN | MCB1:SWITCHCRAFT_57PC5FS | J3 |
| 1 | SYNC | MCB1:SWITCHCRAFT_57PC5FS | J1 |
| 1 | TAPE_IN | Connector_Audio:Jack_6.35mm_Neutrik_NMJ4HFD3_Horizontal | J6 |
| 1 | TAPE_OUT | Connector_Audio:Jack_6.35mm_Neutrik_NMJ4HFD3_Horizontal | J7 |
Questions
How big is the MCB-1 PCB?
It measures 195.6 × 35.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MCB-1 use?
34 parts, built around the 74LS05P-E and H11L3. 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 MCB-1 KiCad files?
From the peon374/MCB-1 repository on GitHub, at the commit this page was made from: the board is MCB1.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the MCB-1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask peon374 before reusing the design.
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