HardLabs

UniversalTKL

ojas-mediratta·keyboard-design·OpenTKL-main/PCB/Kicad Files/UniversalTKL.kicad_pcb

UniversalTKL PCB layout, top view — open source AVR/Arduino board by ojas-mediratta

About the UniversalTKL PCB

UniversalTKL is an open source AVR/Arduino PCB design by ojas-mediratta, published on GitHub. It is a 2-layer board measuring 344 × 124 mm, with 175 components from 33 distinct parts.

Its main chip is the SRV05-4, from the AVR/Arduino family. By type, the board carries 99 LEDs, 49 diodes, 4 connectors, 1 IC, 1 crystal and 1 fuse.

It belongs with the keyboards designs in this gallery.

From the project

A centralized repo for my custom mechanical keyboard case and plate designs — including CAD files, layout variations, and iterative prototypes for the boards I build.

Features: - Top Mount USB-C or Unified Daughterboard. - In switch indicator lights for Caps Lock, Scroll Lock, and Layer on Esc. - Atmega 32u4-mu MCU - Support for both MX and Alps switches - Support for gummy worm mount boards, tabs in the same spaces as Hineys h88 pcb - RGB breakout between the nav and arrow clusters for 1.2og like designs - ISP breakout for if you know what you're doing ;)

UniversalTKL, from the project README
From the project README

Main components on the UniversalTKL

SRV05-4

UniversalTKL bill of materials (BOM)

175 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SRV05-4
ATmega32U4-M
U1
1
16MHZ
Resonator_Small
Y1
1
C160404
Reset Jumper
J1
1
CONN_RGB
J2
1
CONN_DB
J3
1
ISP_Breakout
J4
3
.1u
C_DECOUP1, C_DECOUP2, C_DECOUP3
1
10u
C_DECOUP4
1
1u
C_UCAP1
1
500MA
Polyfuse_Small
F1
1
MX-LED
MX1
2
MX-LED
MX4, MX95
1
MX-LED
MX7
1
MX-NoLED
MX80
2
22
R_DATA1, R_DATA2
2
10k
R_HWB1, R_RST1
3
220
R_INDICATOR1, R_INDICATOR2, R_INDICATOR3
2
5k1
R_USB1, R_USB2
1
HRO-TYPE-C-31-M-12
USB1
8
MX-NoLED
MX2, MX3, MX10, MX17, MX60, MX61, MX73, MX81
Show 13 more
QtyPartRefs
78
MX-NoLED
MX5, MX11, MX12, MX13, MX14, MX15, MX16, MX18 +70
6
MX-NoLED
MX6, MX9, MX23, MX67, MX86, MX90
1
MX-NoLED
MX8
1
MX-NoLED
MX39
1
MX-NoLED
MX45
1
MX-NoLED
MX72
1
MX-NoLED
MX78
1
MX-NoLED
MX84
1
MX-NoLED
MX89
44
1N4148
BAV70_Small
D1, D2, D3, D4, D5, D6, D7, D8 +36
1
1N4148
PRTR5V0U2X
D18
3
1N4148
D_Small
D46, D47, D48
1
D_Small
D79

UniversalTKL design files

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

UniversalTKL: common questions

What microcontroller does the UniversalTKL use?

The UniversalTKL is built around the SRV05-4, from the AVR/Arduino family.

How big is the UniversalTKL PCB?

The UniversalTKL measures 344 × 124 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the UniversalTKL?

175 components, from 33 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 UniversalTKL design files?

From the ojas-mediratta/keyboard-design 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 UniversalTKL design in my own project?

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

Can I test firmware for the UniversalTKL 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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