HardLabs

KaSe

mornepousse·SpLiT_KaSe

KaSe PCB layout, top view — open source ESP32 board by mornepousse

About the KaSe PCB

KaSe is an open source ESP32 PCB design by mornepousse, published on GitHub. It is a 2-layer board measuring 168.6 × 140.4 mm, with 143 components from 34 distinct parts.

Its main chip is the ESP32-S3, from the ESP32 family. Other key parts include the BQ25611D, W25Q128JVS and ESP32-S3-DevKitC. By type, the board carries 54 diodes, 41 resistors, 33 switches, 5 connectors, 5 capacitors and 4 ICs.

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

From the project

Custom ergonomic split fully-wireless keyboard - ESP32-S3, NRF24L01+, KiCad 9

Custom ergonomic split fully-wireless keyboard, designed in KiCad 9.

Evolution of the KaSe (non-split, ESP32-S3) into a split design.

Each keyboard half is an independent unit:

- MCU: ESP32-S3-DevKitC - Wireless: ESP-NOW (half-to-half) + NRF24L01+ (half-to-dongle) - Keys: 33 Cherry MX switches, 7x5 matrix with BAT54C anti-ghosting diodes - Display: WeAct 1.54" e-ink (SSD1681) on one half - Trackpad: TPS43-201A-S capacitive touchpad (I2C) on the other half, free-wired - Power: 2x 16340 Li-ion cells in series (6.0-8.4V) with USB-C BMS charging - PCB: Reversible single design (same PCB for…

Main components on the KaSe

BQ25611DESP32-S3W25Q128JVSESP32-S3-DevKitC

KaSe bill of materials (BOM)

143 components, 34 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
BQ25611D
TPS61040DBV
U1
1
ESP32-S3
ESP32-S3-DevKitC
U2
1
W25Q128JVS
NRF24L01_Breakout
U4
1
ESP32-S3-DevKitC
U5
1
CONN_01X02
Conn_01x08
J1
1
CONN_01X10_PIN
TPS43-201A-S
J2
1
CONN_02X04
LX_LISC_V2
J3
1
CONN_01X10_PIN
DD4012SA module +3.3
J4
1
CONN_02X03
Conn_01x02_Pin
J5
33
SWITCH_PUSH
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +25
20
C8598
BAT54C
D1, D2, D3, D4, D5, D6, D7, D8 +12
33
C8598
LED_3mm
D20, D21, D22, D23, D24, D25, D26, D27 +25
1
BAT54C
D32
1
C75110
10uH
L1
1
1UF
100nF
C1
1
100NF
100nF
C2
1
1UF
10uF
C3
1
1UF
1uF
C4
1
100NF
1uF
C5
1
10k
R3
Show 14 more
QtyPartRefs
1
10K
10k
R4
2
10K
22
R5, R17
1
10K
R_sense
R6
15
100
R7, R19, R22, R23, R25, R26, R28, R29 +7
1
220K
22
R8
1
150K
100
R9
1
470K
100
R10
1
470K
22
R11
2
5K1
100
R12, R13
7
22
R14, R21, R24, R27, R30, R33, R36
4
10K
100
R15, R16, R18, R20
2
4.7k
R38, R43
1
100k
R41
1
47k
R42

KaSe design files

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

KaSe: common questions

What microcontroller does the KaSe use?

The KaSe is built around the ESP32-S3, from the ESP32 family.

How big is the KaSe PCB?

The KaSe measures 168.6 × 140.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the KaSe?

143 components, from 34 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 KaSe design files?

From the mornepousse/SpLiT_KaSe 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 KaSe design in my own project?

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

Can I test firmware for the KaSe 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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