HardLabs

Tao Te Ching LEFT

sudo-apt-install-tap·TaoTeChing·PCB/Segmented/Tao Te Ching LEFT.kicad_pcb

Tao Te Ching LEFT PCB layout, top view — open source Nordic nRF board by sudo-apt-install-tap
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About the Tao Te Ching LEFT PCB

Tao Te Ching LEFT is an open source Nordic nRF PCB design by sudo-apt-install-tap, published on GitHub. It is a 2-layer board measuring 138.1 × 89.7 mm, with 49 components from 3 distinct parts.

Its main chip is the XIAO-nRF52840-DIP, from the Nordic nRF family. By type, the board carries 24 switches, 24 diodes and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

A open-source split keyboard made for ergonomics!! Made to feel minimalist. This is a ortholinear keyboard.

Split keyboard. Ortholinear grid with column stagger. Built for comfort and long sessions.

See renders and PCB files for exact spacing and geometry.

Plates can be 3D-printed (PLA works) or CNCed.

Tao Te Ching LEFT, from the project README
From the project README

Main components on the Tao Te Ching LEFT

XIAO-nRF52840-DIP

Tao Te Ching LEFT bill of materials (BOM)

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

QtyPartRefs
1
XIAO-nRF52840-DIP
U1
24
SW_Push_45deg
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +16
24
D
D1, D2, D3, D4, D5, D6, D7, D8 +16

Tao Te Ching LEFT design files

The KiCad project lives in the sudo-apt-install-tap/TaoTeChing repository on GitHub; these links point at the commit this page was built from.

Tao Te Ching LEFT: common questions

What microcontroller does the Tao Te Ching LEFT use?

The Tao Te Ching LEFT is built around the XIAO-nRF52840-DIP, from the Nordic nRF family.

How big is the Tao Te Ching LEFT PCB?

The Tao Te Ching LEFT measures 138.1 × 89.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Tao Te Ching LEFT?

49 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 Tao Te Ching LEFT design files?

From the sudo-apt-install-tap/TaoTeChing repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Tao Te Ching LEFT design in my own project?

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

Can I test firmware for the Tao Te Ching LEFT without the hardware?

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

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