HardLabs

KiPad

awkwardbunny·KiPad

KiPad PCB layout, top view — open source AVR/Arduino board by awkwardbunny

About the KiPad PCB

KiPad is an open source AVR/Arduino PCB design by awkwardbunny, published on GitHub. It is a 2-layer board measuring 81.9 × 126.7 mm, with 78 components from 34 distinct parts.

Its main chip is the ATMEGA32U2-M, from the AVR/Arduino family. By type, the board carries 22 switches, 21 LEDs, 21 diodes, 6 capacitors, 5 resistors and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

Custom PCB + 3D printed keycaps and case.

Custom PCB + 3D printed keycaps and case.

The PCB was designed in KiCad and manufactured by JLCPCB.

Most of the components have a custom field DIGIKEY, which corresponds to the Digikey part number. Components can be ordered from Digikey easily by doing a BOM export and using Digikey's upload list feature.

The hotswap connectors, key switches, and stablizers do not have Digikey part numbers. Choose ones you like.

KiPad, from the project README
From the project README

Main components on the KiPad

ATMEGA32U2-M

KiPad bill of materials (BOM)

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

QtyPartRefs
1
ATMEGA32U2-M
ATmega32U2-M
U2
1
16MHZ
16MHz
Y1
1
USB_C_RECEPTACLE_USB2.0_14P
USB_C_Receptacle_USB2.0_14P
J1
1
SW_A
SW1
1
SW_B
SW2
1
SW_C
SW3
1
SW_D
SW4
1
SW_NL
SW5
1
SW_DIV
SW6
1
SW_MUL
SW7
1
SW_SUB
SW8
1
SW_7
SW9
1
SW_8
SW10
1
SW_9
SW11
1
SW_ADD
SW12
1
SW_4
SW13
1
SW_5
SW14
1
SW_6
SW15
1
SW_1
SW16
1
SW_2
SW17
Show 14 more
QtyPartRefs
1
SW_3
SW18
1
SW_ENTER
SW19
1
SW_0
SW20
1
SW_DOT
SW21
1
RESET
SW22
21
SK6812MINI
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +13
21
~
D1, D2, D3, D4, D5, D6, D7, D8 +13
2
22P
22p
C1, C3
2
0.1U
0.1u
C2, C5
1
1u
C6
1
10U
10u
C7
1
10K
10k
R1
2
5.1K
5.1k
R2, R3
2
22
R4, R5

KiPad design files

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

KiPad: common questions

What microcontroller does the KiPad use?

The KiPad is built around the ATMEGA32U2-M, from the AVR/Arduino family.

How big is the KiPad PCB?

The KiPad measures 81.9 × 126.7 mm, has 2 copper layers and is 1.2 mm thick.

How many components are on the KiPad?

78 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 KiPad design files?

From the awkwardbunny/KiPad 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 KiPad design in my own project?

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

Can I test firmware for the KiPad 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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