HardLabs

Udon

uw-x·clearbuds-hw·udon_pcb/udon.kicad_pcb

Udon PCB layout, top view — open source AVR/Arduino board by uw-x
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About the Udon PCB

Udon is an open source AVR/Arduino PCB design by uw-x, published on GitHub under the CERN-OHL-W-2.0 license. It is a 2-layer board measuring 68.6 × 53.3 mm, with 8 components from 5 distinct parts.

Its main chip is the Arduino_1pin, from the AVR/Arduino family.

From the project

- KiCAD design files are in shiofpc folder. - Fabrication output (Gerbers) are in shiofpc/shiorevafabv4. The suggested stack up is in shiofpc/shiostackup.xlsx. Suggested BOM is in shiofpc/shioBOMrevafab23.csv. - Schematic PDF can be found at shiofpc/shiofpc_revA.pdf

- KiCAD design files are in shiofpc folder. - Fabrication output (Gerbers) are in shiofpc/shiorevafabv4. The suggested stack up is in shiofpc/shiostackup.xlsx. Suggested BOM is in shiofpc/shioBOMrevafab23.csv. - Schematic PDF can be found at shiofpc/shiofpc_revA.pdf

Errata: The design contains some errors that can be addressed in future revisions. The errors do not affect function, but do affect robustness. 1. Add 0.1uF decoupling capacitor to PDM mic (ICS-41350) Vcc. 2. Extend battery holder terminal pads further under solder mask to prevent pad tearout. 3. Consider using FR4 stiffener or…

Udon, from the project README
From the project README

Udon bill of materials (BOM)

8 components, 5 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Power
P1
1
Analog
P2
1
Digital
P3
1
Digital
P4
4
CONN_01X01
P5, P6, P7, P8

Udon design files

The KiCad project lives in the uw-x/clearbuds-hw repository on GitHub; these links point at the commit this page was built from.

Udon: common questions

What microcontroller does the Udon use?

The Udon is built around the Arduino_1pin, from the AVR/Arduino family.

How big is the Udon PCB?

The Udon measures 68.6 × 53.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Udon?

8 components, from 5 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 Udon design files?

From the uw-x/clearbuds-hw repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Udon design in my own project?

Yes, under the terms of its CERN-OHL-W-2.0 license, which uw-x chose for the repository.

Can I test firmware for the Udon without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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