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Sdmux4

hnz1102·sdcdmux-emmc·hardware/sdcard-version/sdmux4.kicad_pcb

Sdmux4 PCB layout, top view — open source board by hnz1102
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About the Sdmux4 PCB

Sdmux4 is an open source PCB design by hnz1102, published on GitHub under the MIT license. It is a 2-layer board measuring 68.3 × 57.7 mm, with 115 components from 42 distinct parts.

Other key parts include the SPS-445, SPX3819M5-L, AT24MAC402-STUM, USB2640-HZH-02 and 93LCXXBXXOT. By type, the board carries 46 capacitors, 34 resistors, 9 ICs, 8 transistors, 8 diodes and 4 inductors.

It belongs with the usb & debug tools designs in this gallery.

From the project

SD CARD and eMMC Device Multiplexer with Infrared Remote Controller

The SDCDMUX provides a convenient and quick change of a SW image of a device that has an SD Card interface from a remote.

When I am developing by booting from an SD memory card on a device such as the Raspberry Pi, it is not easy to rewrite the SD card image and replace it by hand. Remove the SD card, insert it into the host PC, and take a dozen minutes rewriting the SW image, after that, return the SD card to the device and turn on the power... But, This tool can change the image of the eMMC directly from the host PC, and the device can be booted as an SD card with the new image.

Sdmux4, from the project README
From the project README

Main components on the Sdmux4

SPS-445SPX3819M5-LAT24MAC402-STUMUSB2640-HZH-0293LCXXBXXOTFT232HL74AHC1G14TMUX1574PWR

Sdmux4 bill of materials (BOM)

115 components, 42 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SPS-445
U201
1
SPX3819M5-L
U301
1
AT24MAC402-STUM
U401
1
USB2640-HZH-02
U402
1
93LCXXBXXOT
93LCxxBxxOT
U501
1
FT232HL
U502
1
74AHC1G14
U601
2
TMUX1574PWR
U602, U603
4
2N7002K
Q201, Q602, Q603, Q606
4
IRF7606PBF
Q601, Q604, Q605, Q607
1
24MHZ
24MHz
Y401
1
12MHZ
12MHz
Y501
1
USB_B_Mini
J101
1
uSD-CARD-PAD
J102
1
MICRO_SD_CARD_DET_HIROSE_DM3AT-SF-PEJM5
Micro_SD_Card_Det_Hirose_DM3AT-SF-PEJM5
J103
1
RESET SW
SW301
4
LED RED
D201, D301, D302, D401
1
OSI5LA5113A
D202
1
IND-1 LED GRN
D501
1
IND-2 LED GRN
D502
Show 22 more
QtyPartRefs
1
TGT SEL LED RED
D601
1
BK2125HS601-T
FB301
1
BLM18RK102SN1
FB401
2
BK2125HS601-T
FB501, FB502
25
0.1UF/50V
0.1uF/50v
C101, C102, C105, C301, C303, C305, C405, C406 +17
5
1UF/10V
1uF/10v
C103, C401, C402, C409, C410
6
4.7UF/50V
4.7uF/50v
C104, C411, C412, C512, C513, C514
4
10UF/16V
10uF/16v
C201, C302, C304, C609
2
27PF/50V
27pF/50v
C403, C404
2
27PF/50V
27pF/50v
C504, C505
2
2.2UF/16V
2.2uF/16v
C605, C608
16
10K
R101, R102, R201, R204, R304, R403, R404, R502 +8
5
1K
R202, R301, R604, R606, R609
1
33R
R203
1
20K 1%
R302
3
12K 1%
R303, R402, R501
1
330
R305
1
1M
R401
1
330R
R405
2
27R
R504, R505
1
2K
R506
2
220
R508, R509

Sdmux4 design files

The KiCad project lives in the hnz1102/sdcdmux-emmc repository on GitHub; these links point at the commit this page was built from.

Sdmux4: common questions

How big is the Sdmux4 PCB?

The Sdmux4 measures 68.3 × 57.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Sdmux4?

115 components, from 42 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Sdmux4 design files?

From the hnz1102/sdcdmux-emmc repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Sdmux4 design in my own project?

Yes, under the terms of its MIT license, which hnz1102 chose for the repository.

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