HardLabs

Keyboard2

agkaminski·keyboard2·keyboard69/keyboard2.kicad_pcb

Keyboard2 PCB layout, top view — open source AVR/Arduino board by agkaminski

About the Keyboard2 PCB

Keyboard2 is an open source AVR/Arduino PCB design by agkaminski, published on GitHub under the BSD-3-Clause license. It is a 2-layer board measuring 313.1 × 103.5 mm, with 162 components from 23 distinct parts.

Its main chip is the ATMEGA16U4-A, from the AVR/Arduino family. Other key parts include the 74HC138. By type, the board carries 68 switches, 68 diodes, 10 resistors, 7 capacitors, 5 connectors and 3 ICs.

It belongs with the keyboards designs in this gallery.

From the project

DIY cherry 69% mechanical keyboard - USB or raw matrix

This repository contains designs of mechanical keyboards. Purpose of these keyboards are custom DIY computers that are of all-in-keyboard design.

This is a DIY 69% (nice) mechanical keyboard. Mostly to be used for DIY computers, but there's a provision for USB/PS2 connection too.

Keyboard has been tested in the FellaPC project and proven 100% functional. USB/PS2 connection has not been tested yet.

Keyboard2, from the project README
From the project README

Main components on the Keyboard2

74HC138ATMEGA16U4-A

Keyboard2 bill of materials (BOM)

162 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
74HC138
U1, U2
1
ATMEGA16U4-A
ATmega16U4-A
U3
1
Crystal
Y1
1
CONN_02X06_ODD_EVEN
Conn_02x06_Odd_Even
J1
1
CONN_01X12
Conn_01x12
J2
1
CONN_01X12_MOUNTINGPIN
Conn_01x12_MountingPin
J3
1
USB_B_Mini
J4
1
CONN_02X03_ODD_EVEN
Conn_02x03_Odd_Even
J5
57
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +49
1
SW_Push
SW14
2
SW_Push
SW16, SW29
2
SW_Push
SW31, SW56
2
SW_Push
SW43, SW45
3
SW_Push
SW59, SW60, SW61
1
SW_Push
SW62
68
D
D1, D2, D3, D4, D5, D6, D7, D8 +60
4
100N
100n
C1, C2, C4, C7
1
1u
C3
2
22P
22p
C5, C6
6
10K
R1, R2, R3, R4, R5, R6
Show 3 more
QtyPartRefs
1
DNP
R7
1
4K7
R10
2
22R
R11, R12

Keyboard2 design files

The KiCad project lives in the agkaminski/keyboard2 repository on GitHub; these links point at the commit this page was built from.

Keyboard2: common questions

What microcontroller does the Keyboard2 use?

The Keyboard2 is built around the ATMEGA16U4-A, from the AVR/Arduino family.

How big is the Keyboard2 PCB?

The Keyboard2 measures 313.1 × 103.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keyboard2?

162 components, from 23 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 Keyboard2 design files?

From the agkaminski/keyboard2 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Keyboard2 design in my own project?

Yes, under the terms of its BSD-3-Clause license, which agkaminski chose for the repository.

Can I test firmware for the Keyboard2 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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