2 layers85.7 × 118.3 mm
2 layers314.3 × 123.8 mm
Sg75
carrizo93/sg75A custom low-profile 75% mechanical keyboard. Work in progress.
- Size
- 314.3 × 123.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 181
- Nets
- 122
- Pads
- 581
- Tracks, vias
- 808, 38
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 15 Sep 2024
- Updated
- 24 Nov 2024
Overview
Sg75 is an open-source printed circuit board by carrizo93, from the carrizo93/sg75 repository on GitHub, published under the MIT licence. It is a 2-layer board of 314.3 × 123.8 mm with 181 parts on 122 nets, routed with 808 tracks and 38 vias.
It is built around the ATMEGA32U4-AU and PEC11R-4215F-S0024. Its parts include 83 diodes, 7 capacitors, 4 resistors, 2 switches and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA32U4-AU
QFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH QFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
PEC11R-4215F-S0024
插件-30℃~+70℃ 10mA 24/24 5V Incremental Straight Two-phase output 插件 Rotary Encoders ROHSBournsRotary Encoders
README
README.mdsg75
A custom low-profile 75% mechanical keyboard, named after my time in Singapore.
Parts
181| Qty | Value | Footprint | References |
|---|---|---|---|
| 83 | D_Small | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +67 |
| 71 | ~ | Kailh_PG1353_Solderable:Kailh-PG1353-Solderable-1U | MX1, MX2, MX10, MX11, MX13, MX14, MX15, MX16, MX17, MX19, MX20, MX21, MX22, MX23, MX24, MX25 +55 |
| 3 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C2, C3, C4 |
| 3 | ~ | Kailh_PG1353_Solderable:Kailh-PG1353-Solderable-1.25U | MX6, MX12, MX18 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R4 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric | R2, R3 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric | C6, C7 |
| 2 | ~ | Kailh_PG1353_Solderable:Kailh-PG1353-Solderable-1.5U | MX3, MX77 |
| 2 | ~ | Kailh_PG1353_Solderable:Kailh-PG1353-Solderable-2.25U | MX5, MX72 |
| 2 | ~ | Kailh_PG1353_Solderable:Kailh-PG1353-Solderable-1.75U | MX4, MX67 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C5 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 781710004 | footprints:CON_781710004 | J1 |
| 1 | ATmega32U4-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | PEC11R-4215F-S0024 | digikey-footprints:Rotary_Encoder_Switched_PEC11R | S1 |
| 1 | SW_Push | random-keyboard-parts:SKQG-1155865 | SW1 |
| 1 | ~ | Kailh_PG1353_Solderable:Kailh-PG1353-Solderable-2U | MX76 |
| 1 | ~ | Kailh_PG1353_Solderable:Kailh-PG1353-Solderable-6.25U | MX34 |
Questions
How big is the Sg75 PCB?
It measures 314.3 × 123.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sg75 use?
181 parts, built around the ATMEGA32U4-AU and PEC11R-4215F-S0024. 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 Sg75 KiCad files?
From the carrizo93/sg75 repository on GitHub, at the commit this page was made from: the board is hardware/sg75.kicad_pcb and its schematic hardware/MCU.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sg75 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
Similar boards
- 4 layers121.9 × 109.2 mm
Plinkyblack hwmidi jacks
plinkysynth/plinky_public
a public release of the plinky sw and hw
300 parts227 - 6 layers66 × 66 mm
PD240W kicad
theohg/PD240W
PD240W is a complete hardware and firmware project converting USB-C Power Delivery into a programmable 240W (48V 5A) bench power supply, featuring C++ code for Raspberry Pi Pico, custom PCB Gerbers, and a 3D-printable…
299 parts125 - 2 layers139.7 × 123.2 mm
- 2 layers365 × 160 mm
OrthoCodeCase
Jrodna/OrthoCode
Ortholinear keyboard with thumb clusters and a rotary encoder designed with all THT components and regular keysets.
214 parts18GPL-3.0 - 4 layers29.3 × 187.1 mm
Left Frame
FlightDeckDIY/G1000-NXi-Mega
Welcome to the G1000 NXi Mega project! This repository contains the schematic and PCB design files for a custom-built G1000 avionics panel, designed specifically for use with flight simulators like Microsoft Flight…
127 parts14 - 2 layers61.9 × 62.6 mm
Keydeck
jimmydin7/keydeck
Keydeck is a hardware project, a custom designed macropad with a fully built from scratch PCB, schematic, routing, and 3D model + printed case.
9 parts7 - 4 layers155 × 103 mm
