HardLabs

Kurako 40

nathandot·kurako_40·PCB files/kicad project/kurako_40.kicad_pcb

Kurako 40 PCB layout, top view — open source AVR/Arduino board by nathandot

About the Kurako 40 PCB

Kurako 40 is an open source AVR/Arduino PCB design by nathandot, published on GitHub. It is a 2-layer board measuring 226 × 76 mm, with 108 components from 59 distinct parts.

Its main chip is the ATmega32U4-AU, from the AVR/Arduino family. By type, the board carries 48 switches, 47 diodes, 5 capacitors, 4 resistors, 2 connectors and 1 IC.

From the project

This project was intended to do 2 things, 1: create a board that fits original Planck-style Lo Pro cases with minor modifications, and 2: gain a better understanding of keyboard design theory by replicating one of my favorite form factors. The Kurako 40 was meant to fill a very s

This project was intended to do 2 things, 1: create a board that fits original Planck-style Lo Pro cases with minor modifications, and 2: gain a better understanding of keyboard design theory by replicating one of my favorite form factors. The Kurako 40 was meant to fill a very specific niche: I needed a replacement board and I couldn't find just the board itself. I was also tiring of sales where both PCB and case must be purchased together.

Kurako 40, from the project README
From the project README

Main components on the Kurako 40

ATmega32U4-AU

Kurako 40 bill of materials (BOM)

108 components, 59 distinct parts.

QtyPartRefs
1
ATmega32U4-AU
U1
1
16 Mhz
Y1
1
conn
J1
1
USB_C_Plug_USB2.0
P1
1
TAB
SW1
1
ESC
SW2
1
SHIFT
SW3
1
CTRL
SW4
1
Q
SW5
1
A
SW6
1
Z
SW7
1
WIN
SW8
1
W
SW9
1
S
SW10
1
X
SW11
1
PROG
SW12
1
E
SW13
1
D
SW14
1
C
SW15
1
ALT
SW16
Show 39 more
QtyPartRefs
1
R
SW17
1
F
SW18
1
V
SW19
1
SPACE
SW20
1
T
SW21
1
G
SW22
1
B
SW23
1
Y
SW24
1
H
SW25
1
N
SW26
1
LOWER
SW27
1
U
SW28
1
J
SW29
1
M
SW30
1
RAISE
SW31
1
I
SW32
1
K
SW33
1
,
SW34
1
/
SW35
1
O
SW36
1
L
SW37
1
.
SW38
1
LEFT
SW39
1
P
SW40
1
;
SW41
1
UP
SW42
1
DOWN
SW43
1
BKSP
SW44
1
'
SW45
1
ENTER
SW46
1
RIGHT
SW47
1
SW_SPST
SW48
47
D_ALT
D1, D2, D3, D4, D5, D6, D7, D8 +39
2
100n
C1, C5
1
1u
C2
2
22p
C3, C4
2
22e
R1, R2
1
10k
R3
1
1M
R4

Kurako 40 design files

The KiCad project lives in the nathandot/kurako_40 repository on GitHub; these links point at the commit this page was built from.

Kurako 40: common questions

What microcontroller does the Kurako 40 use?

The Kurako 40 is built around the ATmega32U4-AU, from the AVR/Arduino family.

How big is the Kurako 40 PCB?

The Kurako 40 measures 226 × 76 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Kurako 40?

108 components, from 59 distinct parts. The full bill of materials is listed on this page.

Where can I download the Kurako 40 design files?

From the nathandot/kurako_40 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Kurako 40 design in my own project?

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

Can I test firmware for the Kurako 40 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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