HardLabs

Splay

rek·keyboards·04/splay/splay.kicad_pcb

Splay PCB layout, top view — open source AVR/Arduino board by rek

About the Splay PCB

Splay is an open source AVR/Arduino PCB design by rek, published on GitHub. It is a 2-layer board measuring 154.7 × 90.8 mm, with 47 components from 5 distinct parts.

Its main chip is the Arduino_Pro_Micro, from the AVR/Arduino family. Other key parts include the TRRS. By type, the board carries 23 switches, 22 diodes and 2 ICs.

It belongs with the keyboards designs in this gallery.

From the project

build notes and config for any keyboards i build

build notes and config for any keyboards i build

A nice intro: https://youtu.be/8WXpGTIbxlQ?si=IPm6OvvAeKLTbCmh

Then don't forget: https://docs.qmk.fm/faq_build#linux-udev-rules

- Cannot find the device? - Make sure you are using a data USB cable - Try USB-A not USB-C - For example Arduino Nano will not show up using a C-C cable

Main components on the Splay

TRRSArduino_Pro_Micro

Splay bill of materials (BOM)

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

QtyPartRefs
1
TRRS
U1
1
Arduino_Pro_Micro
U2
22
Keyswitch
S1, S2, S3, S4, S5, S6, S7, S8 +14
1
Reset
SW1
22
Diode
D1, D2, D3, D4, D5, D6, D7, D8 +14

Splay design files

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

Splay: common questions

What microcontroller does the Splay use?

The Splay is built around the Arduino_Pro_Micro, from the AVR/Arduino family.

How big is the Splay PCB?

The Splay measures 154.7 × 90.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Splay?

47 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 Splay design files?

From the rek/keyboards 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 Splay design in my own project?

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

Can I test firmware for the Splay 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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