HardLabs

Ma42

anschwa·ma42·hardware/pcb/revB/ma42_PCB_revB/keyboard.kicad_pcb

Ma42 PCB layout, top view — open source AVR/Arduino board by anschwa

About the Ma42 PCB

Ma42 is an open source AVR/Arduino PCB design by anschwa, published on GitHub under the MIT license. It is a 2-layer board measuring 236.7 × 74.7 mm, with 107 components from 11 distinct parts.

Its main chip is the ATMEGA32U4, from the AVR/Arduino family. By type, the board carries 46 switches, 45 diodes, 8 capacitors, 4 resistors, 2 connectors and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

A programmable 42% mechanical keyboard for Dvorak.

The MA42 PCBs are licensed under CC BY-SA 3.0.

However, this is due to a misunderstanding with the GH60 licensing.

The GH60 KiCad Source we accesed in July 2014 was distributed as "open source" without any explicit licence.

Currently, the GH60 download page was updated with a CC BY-SA 3.0 license sometime after October 17 2014 Many months after our projects completion.

Main components on the Ma42

ATMEGA32U4

Ma42 bill of materials (BOM)

107 components, 11 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4
IC1
1
ASX3F
X1
2
USB
J1, J2
45
MX1A
S1, S2, S3, S4, S5, S6, S7, S8 +37
1
Reset
S46
45
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +37
2
1u
C1, C7
4
100n
C2, C3, C4, C5
2
22p
C6, C8
2
22
R1, R2
2
10k
R3, R4

Ma42 design files

The KiCad project lives in the anschwa/ma42 repository on GitHub; these links point at the commit this page was built from.

Ma42: common questions

What microcontroller does the Ma42 use?

The Ma42 is built around the ATMEGA32U4, from the AVR/Arduino family.

How big is the Ma42 PCB?

The Ma42 measures 236.7 × 74.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ma42?

107 components, from 11 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 Ma42 design files?

From the anschwa/ma42 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Ma42 design in my own project?

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

Can I test firmware for the Ma42 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.

Similar boards