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Split left

dipa-cotton·split·left/split left.kicad_pcb

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

Split left is an open source ESP8266 PCB design by dipa-cotton, published on GitHub. It is a 2-layer board measuring 217.6 × 150 mm, with 194 components from 13 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 80 diodes, 50 capacitors, 42 switches, 17 resistors, 3 ICs and 2 connectors.

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

From the project

my split keyboard!

Split left, from the project README
From the project README

Main components on the Split left

PCF8574APOLIMEX_MOD-WIFI-ESP8266-DEVXIAO-NRF52840-PLUS-SMD

Split left bill of materials (BOM)

194 components, 13 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
PCF8574AP
U1
1
OLIMEX_MOD-WIFI-ESP8266-DEV
Olimex_MOD-WIFI-ESP8266-DEV
U4
1
XIAO-NRF52840-PLUS-SMD
XIAO-nRF52840-Plus-SMD
U6
1
CONN_01X05_PIN
Conn_01x05_Pin
J11
1
CONN_01X06_PIN
Conn_01x06_Pin
J13
40
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +32
2
RotaryEncoder_Switch_MP
SW96, SW97
40
1N914
D1, D2, D3, D4, D5, D6, D7, D8 +32
40
SK6812MINI
D96, D97, D98, D99, D106, D107, D108, D109 +32
47
C
C1, C2, C3, C4, C11, C12, C13, C14 +39
1
100NF
100nf
C101
2
100 picof
C102, C103
17
R
R1, R2, R3, R4, R5, R6, R7, R8 +9

Split left 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 left: common questions

What microcontroller does the Split left use?

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

How big is the Split left PCB?

The Split left measures 217.6 × 150 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Split left?

194 components, from 13 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 left 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 left 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 left 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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