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OnonoKey1

retanar·OnonoKey1

OnonoKey1 PCB layout, top view — open source RP2040/RP2350 board by retanar

About the OnonoKey1 PCB

OnonoKey1 is an open source RP2040/RP2350 PCB design by retanar, published on GitHub. It is a 2-layer board measuring 136.9 × 136.4 mm, with 87 components from 5 distinct parts.

Its main chip is the RP2040_Zero, from the RP2040/RP2350 family. Other key parts include the TRRS Front and TRRS Back. By type, the board carries 42 switches, 42 diodes and 3 ICs.

It belongs with the keyboards designs in this gallery.

From the project

My custom keyboard files

Maybe didn't use many footprints from them, but at least these were useful.

- https://github.com/joe-scotto/keyswitch-kicad-library - https://github.com/daprice/keyswitches.pretty

Main components on the OnonoKey1

RP2040_ZeroTRRS FrontTRRS Back

OnonoKey1 bill of materials (BOM)

87 components, 5 distinct parts.

QtyPartRefs
1
RP2040_Zero
U1
1
TRRS Front
U2
1
TRRS Back
U3
42
Switch
SW00, SW01, SW02, SW03, SW04, SW05, SW06, SW10 +34
42
D
D1, D2, D3, D4, D5, D6, D7, D8 +34

OnonoKey1 design files

The KiCad project lives in the retanar/OnonoKey1 repository on GitHub; these links point at the commit this page was built from.

OnonoKey1: common questions

What microcontroller does the OnonoKey1 use?

The OnonoKey1 is built around the RP2040_Zero, from the RP2040/RP2350 family.

How big is the OnonoKey1 PCB?

The OnonoKey1 measures 136.9 × 136.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OnonoKey1?

87 components, from 5 distinct parts. The full bill of materials is listed on this page.

Where can I download the OnonoKey1 design files?

From the retanar/OnonoKey1 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the OnonoKey1 design in my own project?

The repository has no license, so all rights stay with retanar. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the OnonoKey1 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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