HardLabs

67mk E

str-dst·67mk_E·pcb/67_E.kicad_pcb

67mk E PCB layout, top view — open source AVR/Arduino board by str-dst
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About the 67mk E PCB

67mk E is an open source AVR/Arduino PCB design by str-dst, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 303.2 × 97.6 mm, with 134 components from 25 distinct parts.

Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. Other key parts include the SRV05-4. By type, the board carries 78 LEDs, 35 diodes, 8 capacitors, 7 resistors, 2 ICs and 1 crystal.

From the project

A simple "no frills" drop-in replacement PCB for the KBDfans 67mkII / 67lite

This work is licensed under a [Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License][cc-by-nc-sa].

[cc-by-nc-sa]: http://creativecommons.org/licenses/by-nc-sa/4.0/ [cc-by-nc-sa-image]: https://licensebuttons.net/l/by-nc-sa/4.0/88x31.png [cc-by-nc-sa-shield]: https://img.shields.io/badge/License-CC%20BY--NC--SA%204.0-lightgrey.svg

67mk E, from the project README
From the project README

Main components on the 67mk E

ATMEGA32U4-AUSRV05-4

67mk E bill of materials (BOM)

134 components, 25 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4-AU
ATmega32U4-AU
U1
1
SRV05-4
U2
1
CRYSTAL_GND24_SMALL
Crystal_GND24_Small
X1
1
C69688
Polyfuse_Small
F1
1
MX-LED
MX36
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
USB1
1
MX-NoLED
MX1
59
MX-NoLED
MX2, MX3, MX4, MX5, MX6, MX7, MX8, MX9 +51
5
MX-NoLED
MX19, MX32, MX66, MX68, MX70
1
MX-LED
MX34
1
MX-NoLED
MX35
2
MX-NoLED
MX48, MX51
6
MX-NoLED
MX50, MX71, MX72, MX73, MX75, MX76
1
MX-NoLED
MX63
1
MX-NoLED
MX69
1
MX-NoLED
MX74
35
C68978
D_Small
D1, D2, D3, D4, D5, D6, D7, D8 +27
1
10UF
10uF
C1
4
0.1UF
0.1uF
C2, C3, C4, C5
1
1UF
1uF
C7
Show 5 more
QtyPartRefs
2
22PF
22pF
C8, C9
2
5.1K
5.1k
R1, R2
2
22
R3, R4
2
10K
10k
R5, R6
1
1.5K
1.5k
R7

67mk E design files

The KiCad project lives in the str-dst/67mk_E repository on GitHub; these links point at the commit this page was built from.

67mk E: common questions

What microcontroller does the 67mk E use?

The 67mk E is built around the ATMEGA32U4-AU, from the AVR/Arduino family.

How big is the 67mk E PCB?

The 67mk E measures 303.2 × 97.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 67mk E?

134 components, from 25 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 67mk E design files?

From the str-dst/67mk_E repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the 67mk E 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 67mk E 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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