HardLabs

40--Keyboard

BillyDiman·40--Keyboard-PCB

40--Keyboard PCB layout, top view — open source AVR/Arduino board by BillyDiman

About the 40--Keyboard PCB

40--Keyboard is an open source AVR/Arduino PCB design by BillyDiman, published on GitHub. It is a 2-layer board measuring 228.6 × 76.2 mm, with 112 components from 13 distinct parts.

Its main chip is the ATmega32U4-AU, from the AVR/Arduino family. By type, the board carries 48 LEDs, 48 diodes, 7 capacitors, 4 resistors, 1 IC and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

Migrating keyboard pcb design to github.

This is a complete 40% ortholinear keyboard I designed in KiCad. The project includes a full schematic, PCB layout, and 3D render of the final board.

40--Keyboard, from the project README
From the project README

Main components on the 40--Keyboard

ATmega32U4-AU

40--Keyboard bill of materials (BOM)

112 components, 13 distinct parts.

QtyPartRefs
1
ATmega32U4-AU
U1
1
16MHz
Y1
1
500mA
F1
1
SW_Push
SW1
1
Molex-0548190589
USB1
48
MX-NoLED
MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +40
48
D_Small
D1, D2, D3, D4, D5, D6, D7, D8 +40
3
0.1uF
C1, C2, C3
1
10uF
C4
2
22pF
C5, C6
1
1uF
C7
2
22
R1, R2
2
10k
R3, R4

40--Keyboard design files

The KiCad project lives in the BillyDiman/40--Keyboard-PCB repository on GitHub; these links point at the commit this page was built from.

40--Keyboard: common questions

What microcontroller does the 40--Keyboard use?

The 40--Keyboard is built around the ATmega32U4-AU, from the AVR/Arduino family.

How big is the 40--Keyboard PCB?

The 40--Keyboard measures 228.6 × 76.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 40--Keyboard?

112 components, from 13 distinct parts. The full bill of materials is listed on this page.

Where can I download the 40--Keyboard design files?

From the BillyDiman/40--Keyboard-PCB repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the 40--Keyboard design in my own project?

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

Can I test firmware for the 40--Keyboard 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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