2 layers347.7 × 146.6 mm
Mysterium pcb
coseyfannitutti/mysterium
TKL keyboard that can be entirely assembled using only through hole components, including usb type-c
227 parts541GPL-3.0
2 layers317.3 × 154.8 mm
LCK75
lyso1/LCK7545a 75% through-hole keyboard designed by myself with inspiration from the CFTKB Discipline and Yiancar Gingham
- Size
- 317.3 × 154.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 207
- Nets
- 129
- Pads
- 745
- Tracks, vias
- 1,311, 47
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 1 Oct 2020
- Updated
- 3 Mar 2023
Overview
LCK75 is an open-source printed circuit board by lyso1, from the lyso1/LCK75 repository on GitHub. It is a 2-layer board of 317.3 × 154.8 mm with 207 parts on 129 nets, routed with 1,311 tracks and 47 vias.
It is built around the ATMEGA32A-PU. Its parts include 89 switches, 82 diodes, 7 resistors, 5 capacitors and 1 IC. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdLCK75
a 75% through-hole keyboard designed by myself with inspiration from the CFTKB Discipline and Yiancar Gingham
This work is licensed under a Creative Commons Attribution 4.0 International License.
i will not be held responsible for your endeavors with private runs of this board.
if you have questions reach out to me on discord @Lysol#5640
Parts
207| Qty | Value | Footprint | References |
|---|---|---|---|
| 82 | 1N4148 | LCK75:D_A-405_P7.62mm_Horizontal | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +66 |
| 70 | SW_SPST | MX_Only:MXOnly-1U-NoLED | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +54 |
| 6 | SW_SPST | MX_Only:MXOnly-1.5U-NoLED | SW31, SW44, SW82, SW83, SW88, SW89 |
| 3 | SW_SPST | MX_Only:MXOnly-1.25U-NoLED | SW78, SW79, SW80 |
| 2 | 0.1uF | cftkb:C_Disc_D4.3mm_W1.9mm_P5.00mm | C4, C5 |
| 2 | 22pF | cftkb:C_Disc_D3.0mm_W1.6mm_P2.50mm | C1, C2 |
| 2 | 3.6V | cftkb:D_DO-35_SOD27_P5.08mm_Horizontal | Z1, Z2 |
| 2 | 5.1k | cftkb:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R2, R5 |
| 2 | 75R | cftkb:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R3, R4 |
| 2 | SW_PUSH-keyboard_parts | cftkb:SW_PUSH_6mm | SW87, SW91 |
| 2 | SW_SPST | MX_Only:MXOnly-2.25U-NoLED | SW60, SW63 |
| 2 | SW_SPST | MX_Only:MXOnly-1.75U-NoLED | SW47, SW75 |
| 1 | 1.5K | cftkb:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R7 |
| 1 | 1.5k | cftkb:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1 |
| 1 | 10k | cftkb:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R6 |
| 1 | 4.7uF | cftkb:CP_Radial_D4.0mm_P1.50mm | C3 |
| 1 | 500mA | cftkb:polyfuse_5.1mm | F1 |
| 1 | ATmega32A-PU | cftkb:DIP-40_W15.24mm | U1 |
| 1 | AVR-ISP-6 | cftkb:AVR_ICSP_3x2 | J1 |
| 1 | Crystal | cftkb:Crystal_HC49-4H_Vertical | Y1 |
| 1 | LOGO | silkart:2-lck | G*** |
| 1 | LOGO | silkart:smol | G*** |
| 1 | LOGO | silkart:lysol111 | G*** |
| 1 | OLED | cftkb:ssd1306 128x32 oled | SSD1306 |
| 1 | POWER | cftkb:LED_D3.0mm | LED |
| 1 | Rotary_Encoder_Switch | cftkb:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm-new | SW93 |
| 1 | SW_SPST | MX_Only:MXOnly-2U-NoLED | SW29 |
| 1 | SW_SPST | MX_Only:MXOnly-7U-ReversedStabilizers-NoLED | SW81 |
| 1 | SW_SPST | MX_Only:MXOnly-6.25U-ReversedStabilizers-NoLED | SW90 |
| 1 | Type-C_USB_C_GCT_USB4085 | cftkb:USB_C_GCT_USB4085 | USB1 |
The 195 most common of 207 parts.
Questions
How big is the LCK75 PCB?
It measures 317.3 × 154.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the LCK75 use?
207 parts, built around the ATMEGA32A-PU. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the LCK75 KiCad files?
From the lyso1/LCK75 repository on GitHub, at the commit this page was made from: the board is LCK75gerbers&parts/LCK75.kicad_pcb and its schematic LCK75 kicad libs/LCK75.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LCK75 design in my own project?
Its repository states no licence, so its author keeps all rights: ask lyso1 before reusing the design.
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