2 layers108 × 55 mm
Power control pcb
HacklabJKL/sergei_cnc2
Second version of Hacklab's custom built CNC machine
89 parts6
2 layers89 × 45 mm
Input mux
HacklabJKL/sergei_cnc26Second version of Hacklab's custom built CNC machine
- Size
- 89 × 45 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 49
- Nets
- 53
- Pads
- 162
- Tracks, vias
- 273, 16
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Nov 2021
- Updated
- 24 Oct 2026
Overview
Input mux is an open-source printed circuit board by HacklabJKL, from the HacklabJKL/sergei_cnc2 repository on GitHub. It is a 2-layer board of 89 × 45 mm with 49 parts on 53 nets, routed with 273 tracks and 16 vias.
It is built around the 74HCT151D. Its parts include 34 resistors, 4 capacitors, 3 ICs, 3 connectors and 1 diode. It belongs with the robots and motor control boards of this library.
Main components
1README
README.mdSergei 2 CNC machine project
This repository contains design files for Hacklab Jyväskylä's CNC machine project. The machine is built out of existing linear assemblies that have been donated to us, and as such it is not readily reproducible. But some of the modules may be useful and in any case this repository contains information for future maintenance of the machine.
The machine design is a compromise between router and mill designs. In general router-type CNC machines are more useful for our typical projects, as they have larger work area for flat stock. But in the same time it would be desirable for the machine to be sturdy enough to cut mild steel at reasonable speeds.
The basic design is similar to fixed gantry routers or a portal milling machine. X axis ballscrew assembly moves up and down on two Z axis columns. Y axis moves the table.
Documentation index
Parts
49| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | 1k | Resistor_SMD:R_0805_2012Metric | R1, R2, R3, R4, R5, R6, R7, R8, R10, R11, R12, R13, R14, R15, R16, R33 +1 |
| 16 | 10k | Resistor_SMD:R_0805_2012Metric | R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32 |
| 4 | M3 | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 3 | 74HCT151D | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U1, U3, U4 |
| 2 | 100nF | Capacitor_SMD:C_0805_2012Metric | C3, C4 |
| 2 | 10µF | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | Screw_Terminal_01x12 | TerminalBlock_RND:TerminalBlock_RND_205-00022_1x12_P5.00mm_Horizontal | J1, J2 |
| 1 | 100 | Resistor_SMD:R_0805_2012Metric | R34 |
| 1 | SMAJ5 | Diode_SMD:D_SMA | D2 |
| 1 | Screw_Terminal_01x08 | TerminalBlock_RND:TerminalBlock_RND_205-00018_1x08_P5.00mm_Horizontal | J3 |
Questions
How big is the Input mux PCB?
It measures 89 × 45 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Input mux use?
49 parts, built around the 74HCT151D. 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 Input mux KiCad files?
From the HacklabJKL/sergei_cnc2 repository on GitHub, at the commit this page was made from: the board is electronics/input_mux/input_mux.kicad_pcb and its schematic electronics/braking_shunt/braking_shunt.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Input mux design in my own project?
Its repository states no licence, so its author keeps all rights: ask HacklabJKL before reusing the design.
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