HardLabs

Rev2-left

celcius-plus-273·split-keyboard·rev2-left/rev2-left.kicad_pcb

Rev2-left PCB layout, top view — open source AVR/Arduino board by celcius-plus-273

About the Rev2-left PCB

Rev2-left is an open source AVR/Arduino PCB design by celcius-plus-273, published on GitHub. It is a 2-layer board measuring 133.4 × 110.3 mm, with 85 components from 46 distinct parts.

Its main chip is the ATMEGA32U4, from the AVR/Arduino family. By type, the board carries 34 diodes, 33 switches, 8 capacitors, 6 resistors, 2 connectors and 1 IC.

It belongs with the keyboards designs in this gallery.

Main components on the Rev2-left

ATMEGA32U4

Rev2-left bill of materials (BOM)

85 components, 46 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4
ATmega32U4
U101
1
16 MHz
Y101
1
Bluefruit LE
J101
1
JST-PH
J102
1
reset_sw
S101
1
ESC
SW101
1
1
SW102
1
2
SW103
1
3
SW104
1
4
SW105
1
5
SW106
1
C1
SW107
1
TAB
SW108
1
Q
SW109
1
W
SW110
1
E
SW111
1
R
SW112
1
T
SW113
1
C2
SW114
1
LSHIFT
SW115
Show 26 more
QtyPartRefs
1
A
SW116
1
S
SW117
1
D
SW118
1
F
SW119
1
G
SW120
1
C3
SW121
1
LCTRL
SW122
1
Z
SW123
1
X
SW124
1
C
SW125
1
V
SW126
1
B
SW127
1
C4
SW128
1
SUPER
SW129
1
M1
SW130
1
M2
SW131
1
SPACE
SW132
32
D
D101, D102, D103, D104, D105, D106, D107, D108 +24
2
GREEN
D133, D134
4
0.1UF
0.1uF
C101, C102, C103, C104
1
4.7UF
4.7uF
C105
2
22PF
22pF
C106, C107
1
1UF
1uF
C108
2
10K
10k
R101, R102
2
22
R103, R104
2
1k
R105, R106

Rev2-left design files

The KiCad project lives in the celcius-plus-273/split-keyboard repository on GitHub; these links point at the commit this page was built from.

Rev2-left: common questions

What microcontroller does the Rev2-left use?

The Rev2-left is built around the ATMEGA32U4, from the AVR/Arduino family.

How big is the Rev2-left PCB?

The Rev2-left measures 133.4 × 110.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Rev2-left?

85 components, from 46 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 Rev2-left design files?

From the celcius-plus-273/split-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 Rev2-left design in my own project?

The repository has no license, so all rights stay with celcius-plus-273. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Rev2-left 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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