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Split

dipa-cotton·split·right/split.kicad_pcb

Split PCB layout, top view — open source ESP8266 board by dipa-cotton
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About the Split PCB

Split is an open source ESP8266 PCB design by dipa-cotton, published on GitHub. It is a 2-layer board measuring 251 × 148.4 mm, with 239 components from 11 distinct parts.

Its main chip is the OLIMEX_MOD-WIFI-ESP8266-DEV, from the ESP8266 family. Other key parts include the PCF8574AP and XIAO-NRF52840-PLUS-SMD. By type, the board carries 109 diodes, 58 capacitors, 55 switches, 13 resistors, 3 ICs and 1 connector.

It belongs with the keyboards, iot & wireless and sensors designs in this gallery.

From the project

my split keyboard!

Split, from the project README
From the project README

Main components on the Split

PCF8574APXIAO-NRF52840-PLUS-SMDOLIMEX_MOD-WIFI-ESP8266-DEV

Split bill of materials (BOM)

239 components, 11 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
PCF8574AP
U1
1
XIAO-NRF52840-PLUS-SMD
XIAO-nRF52840-Plus-SMD
U9
1
OLIMEX_MOD-WIFI-ESP8266-DEV
Olimex_MOD-WIFI-ESP8266-DEV
U10
1
CONN_01X05_PIN
Conn_01x05_Pin
J12
55
SW_Push
SW41, SW42, SW43, SW44, SW45, SW46, SW47, SW48 +47
55
1N914
D41, D42, D43, D44, D45, D46, D47, D48 +47
54
SK6812MINI
D186, D187, D188, D189, D190, D191, D192, D193 +46
55
C
C98, C104, C105, C106, C107, C108, C109, C110 +47
2
100NF
100nf
C159, C161
1
100 nf
C160
13
R
R1, R2, R11, R13, R14, R15, R16, R24 +5

Split design files

The KiCad project lives in the dipa-cotton/split repository on GitHub; these links point at the commit this page was built from.

Split: common questions

What microcontroller does the Split use?

The Split is built around the OLIMEX_MOD-WIFI-ESP8266-DEV, from the ESP8266 family.

How big is the Split PCB?

The Split measures 251 × 148.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Split?

239 components, from 11 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 Split design files?

From the dipa-cotton/split 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 Split design in my own project?

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

Can I test firmware for the Split without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

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