HardLabs

Steno28

couchpotatoe1234·Steno28·Steno28 PCB/Steno28 PCB.kicad_pcb

Steno28 PCB layout, top view — open source RP2040/RP2350 board by couchpotatoe1234

About the Steno28 PCB

Steno28 is an open source RP2040/RP2350 PCB design by couchpotatoe1234, published on GitHub. It is a 2-layer board measuring 247.7 × 76.2 mm, with 57 components from 3 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. By type, the board carries 28 switches, 28 diodes and 1 module.

It belongs with the keyboards designs in this gallery.

From the project

simple stenography keyboard with 28 keys

Steno28, from the project README
From the project README

Main components on the Steno28

RaspberryPi_Pico

Steno28 bill of materials (BOM)

57 components, 3 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RaspberryPi_Pico
A1
28
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +20
28
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +20

Steno28 design files

The KiCad project lives in the couchpotatoe1234/Steno28 repository on GitHub; these links point at the commit this page was built from.

Steno28: common questions

What microcontroller does the Steno28 use?

The Steno28 is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the Steno28 PCB?

The Steno28 measures 247.7 × 76.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Steno28?

57 components, from 3 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 Steno28 design files?

From the couchpotatoe1234/Steno28 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 Steno28 design in my own project?

The repository has no license, so all rights stay with couchpotatoe1234. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Steno28 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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