HardLabs

Stno

Heinrich-XIAO·stno·PCB/PCB.kicad_pcb

Stno PCB layout, top view — open source AVR/Arduino board by Heinrich-XIAO

About the Stno PCB

Stno is an open source AVR/Arduino PCB design by Heinrich-XIAO, published on GitHub. It is a 2-layer board measuring 143.2 × 113.5 mm, with 78 components from 5 distinct parts.

Its main chip is the ARDUINO_NANO_ESP32, from the AVR/Arduino family. Other key parts include the COM-09032. By type, the board carries 50 diodes, 25 switches, 2 ICs and 1 module.

It belongs with the keyboards designs in this gallery.

From the project

stno is a one-handed steno keyboard with joysticks for my thumb. I wanted to make stno because I became obsessed with steno, didn't have an n-key roll over keyboard and i didnt want to keep arpegiating, and i wanted a one-handed keyboard like my other keyboards (all of them were

stno is a one-handed steno keyboard with joysticks for my thumb. I wanted to make stno because I became obsessed with steno, didn't have an n-key roll over keyboard and i didnt want to keep arpegiating, and i wanted a one-handed keyboard like my other keyboards (all of them were too small for a steno layout). I wanted to use joysticks since i feel like holding two keys with one finger is awkward and wanted to minimize it, especially for the thumb.

Stno, from the project README
From the project README

Main components on the Stno

COM-09032ARDUINO_NANO_ESP32

Stno bill of materials (BOM)

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

QtyPartRefs
2
COM-09032
U1, U2
1
ARDUINO_NANO_ESP32
Arduino_Nano_ESP32
A1
25
SW_Push
SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 +17
25
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +17
25
SK6812
D26, D27, D28, D29, D30, D31, D32, D33 +17

Stno design files

The KiCad project lives in the Heinrich-XIAO/stno repository on GitHub; these links point at the commit this page was built from.

Stno: common questions

What microcontroller does the Stno use?

The Stno is built around the ARDUINO_NANO_ESP32, from the AVR/Arduino family.

How big is the Stno PCB?

The Stno measures 143.2 × 113.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Stno?

78 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 Stno design files?

From the Heinrich-XIAO/stno 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 Stno design in my own project?

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

Can I test firmware for the Stno 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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