HardLabs

Mfk5

niw·mfk5

Mfk5 PCB layout, top view — open source AVR/Arduino board by niw

About the Mfk5 PCB

Mfk5 is an open source AVR/Arduino PCB design by niw, published on GitHub under the MIT license. It is a 2-layer board measuring 57.2 × 57.2 mm, with 22 components from 12 distinct parts.

Its main chip is the ATmega32U4-M, from the AVR/Arduino family. By type, the board carries 7 capacitors, 6 resistors, 5 diodes, 1 IC, 1 crystal and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

A prototype keyboard that contains enough features to make a full size split keyboard.

A prototype keyboard that contains enough features to make a full size split keyboard. mfk5 is My first keyboard, 5 keys.

This project has concluded and there is a successor, a real full size split keyboard project, mfk60.

The goal is testing a design for each component, footprint, and production process for layered plate design.

- Use Gateron Low-Profile switches on Hot-Swap socket. - Use Gateron Low-Profile 2U stabilizer, which is top plate mount.

Main components on the Mfk5

ATmega32U4-M

Mfk5 bill of materials (BOM)

22 components, 12 distinct parts.

QtyPartRefs
1
ATmega32U4-M
U1
1
16M
Y1
1
USB_C_Receptacle_USB2.0
J1
1
500m
F1
5
D
D1, D2, D3, D4, D5
3
100n
C1, C2, C3
1
10u
C4
2
22p
C5, C6
1
1u
C7
2
5.1k
R1, R2
2
22
R3, R4
2
10k
R5, R6

Mfk5 design files

The KiCad project lives in the niw/mfk5 repository on GitHub; these links point at the commit this page was built from.

Mfk5: common questions

What microcontroller does the Mfk5 use?

The Mfk5 is built around the ATmega32U4-M, from the AVR/Arduino family.

How big is the Mfk5 PCB?

The Mfk5 measures 57.2 × 57.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mfk5?

22 components, from 12 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mfk5 design files?

From the niw/mfk5 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Mfk5 design in my own project?

Yes, under the terms of its MIT license, which niw chose for the repository.

Can I test firmware for the Mfk5 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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