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UDB-S

Unified-Daughterboard·UDB-S

UDB-S PCB layout, top view — open source board by Unified-Daughterboard
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About the UDB-S PCB

UDB-S is an open source PCB design by Unified-Daughterboard, published on GitHub under the MIT license. It is a 4-layer board measuring 40 × 9 mm, with 8 components from 7 distinct parts.

Other key parts include the TPD4E05U06DQAR. By type, the board carries 2 connectors, 2 resistors, 1 IC, 1 fuse, 1 diode and 1 inductor.

It belongs with the keyboards designs in this gallery.

From the project

Narrow variant unified daughterboards for custom keyboard designers and users

For more details on the Unified Daughterboard project, see the main website.

The S1 variant was developed as an entirely new form factor from the older C3 version based on real-world production usage and designer input.

- "Wide and narrow" 40mm wide x 9mm deep x 1.6mm thick form factor - Avoids obstacles such as weights commonly found in custom keyboards - Mountable both right-side-up and upside-down - 2 x M3 mounting points - Fewer large screw taps reduce thread defect issues and assembly effort - Easy and inexpensive to source via JLCPCB or similar - Large DB corner radii which allow…

UDB-S, from the project README
From the project README

Main components on the UDB-S

TPD4E05U06DQAR

UDB-S bill of materials (BOM)

8 components, 7 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TPD4E05U06DQAR
MSKSEMI
U1
1
TYPE-C-31-M-12
Koren Hroparts
J1
1
78171-0004
MOLEX
J2
1
SMD0805-050-16V
TECHFUSE
F1
1
ESD5Z5V0
MDD
D1
1
GZ2012D601TF
Sunlord
FB1
2
C25905
5.1k
R1, R2

UDB-S design files

The KiCad project lives in the Unified-Daughterboard/UDB-S repository on GitHub; these links point at the commit this page was built from.

UDB-S: common questions

How big is the UDB-S PCB?

The UDB-S measures 40 × 9 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the UDB-S?

8 components, from 7 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 UDB-S design files?

From the Unified-Daughterboard/UDB-S 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 UDB-S design in my own project?

Yes, under the terms of its MIT license, which Unified-Daughterboard chose for the repository.

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