HardLabs

Redone-3k v2

kzrtn·unnamed-3k-v2·PCB files/ignore/redone-3k-v2.kicad_pcb

Redone-3k v2 PCB layout, top view — open source AVR/Arduino board by kzrtn
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About the Redone-3k v2 PCB

Redone-3k v2 is an open source AVR/Arduino PCB design by kzrtn, published on GitHub. It is a 2-layer board measuring 57.5 × 52.2 mm, with 31 components from 18 distinct parts.

Its main chip is the ATMEGA32U2-AU, from the AVR/Arduino family. Other key parts include the PRTR5V0U2X. By type, the board carries 11 capacitors, 6 resistors, 5 diodes, 2 ICs, 1 crystal and 1 fuse.

It belongs with the keyboards designs in this gallery.

From the project

A simple 3 key QMK hotswap keypad for osu!

Changes: - Removed in-key LEDs - Changed north facing switches to south facing - Switch pins were changed from B4, B6, B7 to B7, C7, C6 - Removed unnecessary vias.

This means that what is put up here is untested. However if you've tried producing this and everything checks out (it should, changes were very minor) please send me an email at jolene.tkk@gmail.com or contact me somehow. I'll update this page and/or fix any issues raised.

Redone-3k v2, from the project README
From the project README

Main components on the Redone-3k v2

ATMEGA32U2-AUPRTR5V0U2X

Redone-3k v2 bill of materials (BOM)

31 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U2-AU
ATmega32U2-AU
U1
1
PRTR5V0U2X
U2
1
CRYSTAL_GND24_SMALL
Crystal_GND24_Small
Y1
1
Polyfuse_Small
F1
3
MX-NoLED
MX1, MX2, MX3
1
SW_Push
SW1
1
HRO-TYPE-C-31-M-12
USB1
3
SK6812MINI
D1, D2, D3
2
WS2812B
D4, D5
1
1UF
1uF
C1
2
14PF
14pF
C2, C3
4
0.1UF
0.1uF
C4, C5, C10, C11
1
10UF
10uF
C6
3
0.1uF
C7, C8, C9
2
22
R1, R2
1
10K
10k
R3
1
10K
R_Small
R4
2
5.1K
5.1k
R5, R6

Redone-3k v2 design files

The KiCad project lives in the kzrtn/unnamed-3k-v2 repository on GitHub; these links point at the commit this page was built from.

Redone-3k v2: common questions

What microcontroller does the Redone-3k v2 use?

The Redone-3k v2 is built around the ATMEGA32U2-AU, from the AVR/Arduino family.

How big is the Redone-3k v2 PCB?

The Redone-3k v2 measures 57.5 × 52.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Redone-3k v2?

31 components, from 18 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 Redone-3k v2 design files?

From the kzrtn/unnamed-3k-v2 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Redone-3k v2 design in my own project?

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

Can I test firmware for the Redone-3k v2 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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