HardLabs

Big-Keys

brandonHaipas·Big-Keys-PCB

Big-Keys PCB layout, top view — open source AVR/Arduino board by brandonHaipas

About the Big-Keys PCB

Big-Keys is an open source AVR/Arduino PCB design by brandonHaipas, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 118 mm, with 24 components from 13 distinct parts.

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

It belongs with the keyboards designs in this gallery.

From the project

BigKeys PCB, a printed circuit board design for a keyboard to communicate with medium sized non human animals. Still in its really early stage.

In this repository I will be updating the files needed to print the PCB for the InCA:Big-Keys keyboard, which aim is to augmentate communication between human and non-human animals, specifically medium size non-human animals. I'll be updating more details in the project's page. For the development of this project I followed the mechanical PCB guide made by ai03, here's the guide if you want to create your own keypad or keyboard.

Main components on the Big-Keys

ATmega32U4-M

Big-Keys bill of materials (BOM)

24 components, 13 distinct parts.

QtyPartRefs
1
ATmega32U4-M
U1
1
16MHz
Y1
1
Polyfuse
F1
4
MX-NoLED
MX1, MX2, MX3, MX4
1
SW_Push
SW1
1
Molex-0548190589
USB1
4
D_Small
D1, D2, D3, D4
2
22pF
C1, C2
1
C_Small
C3
3
0.1uF
C4, C5, C6
1
10uF
C7
2
10k
R1, R4
2
22
R2, R3

Big-Keys design files

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

Big-Keys: common questions

What microcontroller does the Big-Keys use?

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

How big is the Big-Keys PCB?

The Big-Keys measures 100 × 118 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Big-Keys?

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

Where can I download the Big-Keys design files?

From the brandonHaipas/Big-Keys-PCB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Big-Keys design in my own project?

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

Can I test firmware for the Big-Keys 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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