HardLabs

Lumberjack

peej·lumberjack-keyboard

Lumberjack PCB layout, top view — open source AVR/Arduino board by peej
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About the Lumberjack PCB

Lumberjack is an open source AVR/Arduino PCB design by peej, published on GitHub under the MIT license. It is a 2-layer board measuring 284.7 × 94.2 mm, with 149 components from 24 distinct parts.

Its main chip is the ATMEGA328P-PU, from the AVR/Arduino family. By type, the board carries 62 diodes, 8 resistors, 5 connectors, 5 capacitors, 2 switches and 2 LEDs.

It belongs with the keyboards designs in this gallery.

From the project

5x12 ortholinear through-hole component keyboard PCB for standard 60% cases

Lumberjack is a split 5x12 ortholinear keyboard PCB using through-hole components only.

The goal of this project is to build an all through-hole component ortholinear PCB that fits in a standard 60% tray mount case.

Designed to be easy to build with minimal soldering experience. Get that visible component aesthetic in a standard 60% tray-mount case. 12 pin USB-C or JST connector. Plateless or with FR4 switch plates.

Lumberjack, from the project README
From the project README

Main components on the Lumberjack

ATMEGA328P-PU

Lumberjack bill of materials (BOM)

149 components, 24 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA328P-PU
ATMEGA328-PU
U1
1
16MHz
Y1
1
TYPE-C-31-M-12
USB
J1
1
AVR_ISP_6
J2
1
SM04B-SRSS-TB
JST
J3
1
JST
J4
1
781710004
Molex
J5
2
SW_Push
2u_MX30, 2u_MX60
1
100MA
100mA
F1
59
SW_Push
MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX9 +51
1
SW_Push
MX8
1
6X6MM
RESET
SW1
1
6X6MM
BOOT
SW2
1
3MM
RED
LED1
1
3MM
GREEN
LED2
60
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +52
2
3.6V
D61, D62
2
22p
C1, C2
1
4.7u
C3
2
100n
C4, C5
Show 4 more
QtyPartRefs
3
1.5k
R1, R7, R8
2
75R
R2, R3
1
10k
R4
2
5.1k
R5, R6

Lumberjack design files

The KiCad project lives in the peej/lumberjack-keyboard repository on GitHub; these links point at the commit this page was built from.

Lumberjack: common questions

What microcontroller does the Lumberjack use?

The Lumberjack is built around the ATMEGA328P-PU, from the AVR/Arduino family.

How big is the Lumberjack PCB?

The Lumberjack measures 284.7 × 94.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Lumberjack?

149 components, from 24 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 Lumberjack design files?

From the peej/lumberjack-keyboard 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 Lumberjack design in my own project?

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

Can I test firmware for the Lumberjack 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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