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Keychu

dialgorithm·keychu·KiCad/keychu.kicad_pcb

Keychu PCB layout, top view — open source ESP32 board by dialgorithm
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About the Keychu PCB

Keychu is an open source ESP32 PCB design by dialgorithm, published on GitHub. It is a 2-layer board measuring 144.5 × 87.5 mm, with 50 components from 8 distinct parts.

Its main chip is the XIAO-ESP32-S3-SMD, from the ESP32 family. By type, the board carries 22 switches, 21 diodes, 2 ICs, 2 connectors, 2 resistors and 1 capacitor.

It belongs with the iot & wireless and displays & leds designs in this gallery.

From the project

xiao esp32s3 based wireless corne split kb with oled display. 42 keys, standard corne layout.

xiao esp32s3 based wireless corne split kb with oled display. 42 keys, standard corne layout.

I am using cnc'd acrylic transparent sheets to keep a minimal and clean look.

you can find the detailed bill of materials here

Keychu, from the project README
From the project README

Main components on the Keychu

XIAO-ESP32-S3-SMD

Keychu bill of materials (BOM)

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

QtyPartRefs
2
XIAO-ESP32-S3-SMD
U1, U2
1
Conn_01x02
J1
1
Conn_01x04
J2
21
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +13
1
SW_SPST
SW22
21
D
D1, D2, D3, D4, D5, D6, D7, D8 +13
1
100nF
C1
2
100k
R1, R2

Keychu design files

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

Keychu: common questions

What microcontroller does the Keychu use?

The Keychu is built around the XIAO-ESP32-S3-SMD, from the ESP32 family.

How big is the Keychu PCB?

The Keychu measures 144.5 × 87.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keychu?

50 components, from 8 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 Keychu design files?

From the dialgorithm/keychu 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 Keychu design in my own project?

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

Can I test firmware for the Keychu without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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