HardLabs

LCK75

lyso1·LCK75v3·LCK75 kicad libs/LCK75.kicad_pcb

LCK75 PCB layout, top view — open source AVR/Arduino board by lyso1
Simulate this board

About the LCK75 PCB

LCK75 is an open source AVR/Arduino PCB design by lyso1, published on GitHub under the MIT license. It is a 2-layer board measuring 317.3 × 154.8 mm, with 201 components from 27 distinct parts.

Its main chip is the ATmega32A-PU, from the AVR/Arduino family. By type, the board carries 95 switches, 87 diodes, 7 resistors, 5 capacitors, 2 LEDs and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

The 2nd revision of the LCK75, this is updated to have support for ISO and split backspace layout options

LCK75, from the project README
From the project README

Main components on the LCK75

ATmega32A-PU

LCK75 bill of materials (BOM)

201 components, 27 distinct parts.

QtyPartRefs
1
ATmega32A-PU
U1
1
Crystal
Y1
1
AVR-ISP-6
J1
1
500mA
F1
74
SW_SPST
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +66
1
SW_SPST
SW29
6
SW_SPST
SW31, SW44, SW82, SW83, SW88, SW89
2
SW_SPST
SW47, SW75
2
SW_SPST
SW60, SW63
4
SW_SPST
SW62, SW78, SW79, SW80
1
SW_SPST
SW81
2
SW_PUSH-keyboard_parts
SW87, SW91
1
SW_SPST
SW90
1
SW_SPST
SW92
1
Rotary_Encoder_Switch
SW93
1
Type-C_USB_C_GCT_USB4085
USB1
1
POWER
LED1
1
OLED
SSD1306
85
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +77
2
3.6V
D83, D84
Show 7 more
QtyPartRefs
2
22p
C1, C2
1
4.7u
C3
2
0.1u
C4, C5
2
1.5k
R1, R7
2
5.1k
R2, R5
2
75R
R3, R4
1
10k
R6

LCK75 design files

The KiCad project lives in the lyso1/LCK75v3 repository on GitHub; these links point at the commit this page was built from.

LCK75: common questions

What microcontroller does the LCK75 use?

The LCK75 is built around the ATmega32A-PU, from the AVR/Arduino family.

How big is the LCK75 PCB?

The LCK75 measures 317.3 × 154.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LCK75?

201 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the LCK75 design files?

From the lyso1/LCK75v3 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the LCK75 design in my own project?

Yes, under the terms of its MIT license, which lyso1 chose for the repository.

Can I test firmware for the LCK75 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.

Similar boards