2 layers44.3 × 20 mm
2 layers86.4 × 54.6 mm
Sd mux
ZakSN/sd_mux22micro SD card multiplexer
- Size
- 86.4 × 54.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 30
- Pads
- 105
- Tracks, vias
- 351, 76
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 22 Nov 2017
- Updated
- 15 Dec 2017
Overview
Sd mux is an open-source printed circuit board by ZakSN, from the ZakSN/sd_mux repository on GitHub. It is a 2-layer board of 86.4 × 54.6 mm with 22 parts on 30 nets, routed with 351 tracks and 76 vias.
Its parts include 5 resistors, 4 connectors, 3 capacitors, 2 ICs and 2 diodes.
README
README.mdmicro SD card multiplexer
This project is a simple micro SD card multiplexer for single board computers such as the Raspberry Pi. The device will be used for testing of FreeBSD on a variety of SBCs. The idea is that a host computer can be used to flash an image to the SD card and the target computer can then be booted from the SD card without the need to manually move the SD card from one computer to the other. The device consists of three boards:
- The multiplexer board, which is controlled by the host and holds the micro SD card being used.
- Two micro SD card plug boards. The are PCBs the smae shape as a micro SD card one of these boards plugs into the host and the other plugs into the target. the plug boards are connected to the mux board via flat flex cables allowing them to be physicaly seperate from the mux board.
The device is loosely inspired by a similar project found here: http://www.linuxinternals.org/blog/2014/06/04/a-microsd-card-remote-switcher/
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100nF | Capacitors_SMD:C_0603_HandSoldering | C1, C2, C3 |
| 3 | 10K | Resistors_SMD:R_0603_HandSoldering | R1, R2, R5 |
| 2 | 1K | Resistors_SMD:R_0603_HandSoldering | R3, R4 |
| 2 | LOGO | sd_mux_footprints:fbsd_logo | G***, G*** |
| 2 | SN74CBT3257DR | SMD_Packages:SO-16-N | IC1, IC2 |
| 1 | CONTROL | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J4 |
| 1 | DEVICE 1 | sd_mux_footprints:FFC_connector_SFW12R-2STE1LF | J2 |
| 1 | DEVICE 2 | sd_mux_footprints:FFC_connector_SFW12R-2STE1LF | J3 |
| 1 | Micro_SD_Card_Det | sd_mux_footprints:push_pull_uSD_slot_1040310811 | J1 |
| 1 | PWR | LEDs:LED_0603_HandSoldering | LED1 |
| 1 | SEL | LEDs:LED_0603_HandSoldering | LED2 |
The 18 most common of 22 parts.
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Questions
How big is the Sd mux PCB?
It measures 86.4 × 54.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sd mux use?
22 parts. 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 Sd mux KiCad files?
From the ZakSN/sd_mux repository on GitHub, at the commit this page was made from: the board is sd_mux/sd_mux.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sd mux design in my own project?
Its repository states no licence, so its author keeps all rights: ask ZakSN before reusing the design.