2 layers248.9 × 139.7 mm
GIMIX DMA Floppy
roberto314/GIMIX_reproduction
Reproducing SS-50 and SS-30 cards and GIMIX Ghost Case and Mainboard
138 parts1BSD-2-Clause
2 layers40 × 45 mm
Breakout board for the Smoothieboard V2 that converts allows the independent switching of motors from a single axis.
- Size
- 40 × 45 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 21
- Nets
- 22
- Pads
- 109
- Tracks, vias
- 435, 72
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 25 Feb 2026
- Updated
- 4 Oct 2026
Overview
MMSA is an open-source printed circuit board by Ccecil, from the Ccecil/MultiMotorSingleAxisSplitter repository on GitHub. It is a 2-layer board of 40 × 45 mm with 21 parts on 22 nets, routed with 435 tracks and 72 vias.
It is built around the 74LS240DC and 74LS132P-E. Its parts include 6 connectors, 3 capacitors and 2 ICs. It belongs with the robots and motor control and interfaces and adapters boards of this library.
Main components
274LS240DC
--55℃~+125℃ 1 15mA 18ns@5V,45pF 24mA 29mA 4.75V~5.25V 74LS Output enable Schmitt trigger Tri-State - Buffers, Drivers, Receivers, TransceiversTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
74LS132P-E
DIP-14-20℃~+75℃ 2 2.7V 22ns@5V,15pF 4 4.75V~5.25V 400uA 500mV 74LS 8mA NAND Gate Schmitt trigger DIP-14 Logic Gates ROHSRenesas ElectronicsLogic Gates
README
README.mdMulti-Motor Single Axis splitter.
This is a breakout board for the V2 Smoothieboard which allows switching of multiple motors that are connected to a single axis.
Typically used in a situation where the machine has parallel actuators which are moving along the same plane but may need to be adjusted for position. (i.e. Mill with 2 motors/screws on Y, 3d printer with 2/3/4 motors on the Z axis).
IO is noninverting on all signals and the DIR/EN are also buffered (double inverted).
It uses 3-5v for digital logic in and outputs as opendrain pulled up to 5v.
Parts
21| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | Conn_01x05_Pin | Connector_Molex:Molex_KK-254_AE-6410-05A_1x05_P2.54mm_Vertical | J2, J3, J4, J5 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | C_Small | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3 |
| 3 | R_Pack04 | Resistor_SMD:R_Array_Concave_4x0603 | RN1, RN2, RN3 |
| 1 | 74LS132 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U1 |
| 1 | 74LS240 | Package_SO:TSSOP-20_4.4x5mm_P0.5mm | U2 |
| 1 | Conn_01x10_Pin | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J7 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J1 |
| 1 | MountingHole | MountingHole:MountingHole_2.5mm | H5 |
The 19 most common of 21 parts.
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Questions
How big is the MMSA PCB?
It measures 40 × 45 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MMSA use?
21 parts, built around the 74LS240DC and 74LS132P-E. 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 MMSA KiCad files?
From the Ccecil/MultiMotorSingleAxisSplitter repository on GitHub, at the commit this page was made from: the board is MMSA.kicad_pcb and its schematic MMSA.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MMSA design in my own project?
Its repository states no licence, so its author keeps all rights: ask Ccecil before reusing the design.