HardLabs

Dotkb

kemfic·dotkb·dotkb_micro/pcb/dotkb_micro.kicad_pcb

Dotkb PCB layout, top view — open source AVR/Arduino board by kemfic

About the Dotkb PCB

Dotkb is an open source AVR/Arduino PCB design by kemfic, published on GitHub. It is a 2-layer board measuring 100 × 50 mm, with 36 components from 17 distinct parts.

Its main chip is the ATmega32U4-AU, from the AVR/Arduino family. By type, the board carries 9 diodes, 9 resistors, 7 capacitors, 1 IC, 1 crystal and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

custom keyboard

keyboards, nothing too special. the micro is the only one i made so far

Dotkb, from the project README
From the project README

Main components on the Dotkb

ATmega32U4-AU

Dotkb bill of materials (BOM)

36 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATmega32U4-AU
U1
1
16MHz
Y0
1
USB_B_Mini
J1
1
500mA
F1
6
MX-NoLED
MX1, MX2, MX3, MX4, MX5, MX6
1
SW_Push
SW0
6
*
D1, D2, D3, D4, D5, D6
1
LED_YLW
D7
1
LED_GRN
D8
1
LED_RGB_OTHER
D9
3
0.1uF
C0, C1, C2
1
10uF
C3
2
22pF
C4, C5
1
1uF
C6
2
10k
R0, R3
2
22
R1, R2
5
330
R4, R5, R6, R7, R8

Dotkb design files

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

Dotkb: common questions

What microcontroller does the Dotkb use?

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

How big is the Dotkb PCB?

The Dotkb measures 100 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Dotkb?

36 components, from 17 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 Dotkb design files?

From the kemfic/dotkb repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Dotkb design in my own project?

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

Can I test firmware for the Dotkb 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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