HardLabs

KBD8X-MKII

ai03-2725·KBD8X-MKII-PCB

KBD8X-MKII PCB layout, top view — open source AVR/Arduino board by ai03-2725
Simulate this board

About the KBD8X-MKII PCB

KBD8X-MKII is an open source AVR/Arduino PCB design by ai03-2725, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 343.7 × 118.3 mm, with 342 components from 34 distinct parts.

Its main chip is the ATMEGA32U4-MU, from the AVR/Arduino family. Other key parts include the PRTR5V0U2X. By type, the board carries 90 diodes, 90 resistors, 18 LEDs, 7 capacitors, 3 switches and 2 ICs.

From the project

The source for the KBD8X MKII PCB

Please verify the conditions of the license before using.

KBD8X-MKII, from the project README
From the project README

Main components on the KBD8X-MKII

ATMEGA32U4-MUPRTR5V0U2X

KBD8X-MKII bill of materials (BOM)

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

QtyPartRefs
1
ATMEGA32U4-MU
ATmega32U4-MU
U1
1
PRTR5V0U2X
U2
1
DSS60601MZ4-13
Q1
1
16MHZ
16MHz
Y1
18
0.1UF
0.1uF
CRGB1, CRGB2, CRGB3, CRGB4, CRGB5, CRGB6, CRGB7, CRGB8 +10
1
500MA
500mA
F1
78
MX-1U
MX_#0_1, MX_#1, MX_#2, MX_#3, MX_#4, MX_#5, MX_#6, MX_#7 +70
1
MX-2U
MX_BACK1
2
MX-1.75U
MX_CLOCK1, MX_RSHIFT2
4
MX-1.25U
MX_CLOCK2, MX_RCTRL1, MX_RGUI1, MX_RMENU1
5
MX-1.25U
MX_LALT1, MX_LCTRL1, MX_LGUI1, MX_LSHIFT2, MX_RALT1
2
MX-1.5U
MX_LALT2, MX_LCTRL2
1
MX-1U
MX_LGUI2
2
MX-2.25U
MX_LSHIFT1, MX_RETURN1
4
MX-1.5U
MX_RALT2, MX_RCTRL2, MX_TAB1, MX_\1
1
MX-ISO
MX_RETURN2
1
MX-2.75U
MX_RSHIFT1
1
MX-6.25U
MX_SP1
1
MX-7U
MX_SP2
2
22
RC1, RC2
Show 14 more
QtyPartRefs
1
10K
10k
RC3
1
1k
RC4
1
1.5K
1.5k
RC5
2
5K1
5k1
RC6, RC7
1
SW_Push
SW1
2
SW_SPDT
SW2, SW3
1
HRO-TYPE-C-31-M-12
USB1
18
WS2812B
RGB1, RGB2, RGB3, RGB4, RGB5, RGB6, RGB7, RGB8 +10
90
SOD-323
D1, D2, D3, D4, D5, D6, D7, D8 +82
1
1UF
1uF
C2
2
22PF
22pF
C3, C4
1
10UF
10uF
C5
3
0.1UF
0.1uF
C6, C7, C8
90
1k
R1, R2, R3, R4, R5, R6, R7, R8 +82

KBD8X-MKII design files

The KiCad project lives in the ai03-2725/KBD8X-MKII-PCB repository on GitHub; these links point at the commit this page was built from.

KBD8X-MKII: common questions

What microcontroller does the KBD8X-MKII use?

The KBD8X-MKII is built around the ATMEGA32U4-MU, from the AVR/Arduino family.

How big is the KBD8X-MKII PCB?

The KBD8X-MKII measures 343.7 × 118.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the KBD8X-MKII?

342 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 KBD8X-MKII design files?

From the ai03-2725/KBD8X-MKII-PCB repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the KBD8X-MKII design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the KBD8X-MKII 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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