4 layers269.8 × 158.8 mm
Mithril
sanfeps/mithril_kb
mithril keyboard, a split keyboard with 4x6 column ortholinear staggered keys and 3 thumb keys.
247 parts1
2 layers204.8 × 62.6 mm
8 key rhythm game controller that uses microswitches commonly found in mice for short travel and advanced debouce.
- Size
- 204.8 × 62.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 26
- Nets
- 41
- Pads
- 130
- Tracks, vias
- 223, 28
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.99 (file 20260624)
- Created
- 5 Oct 2026
- Updated
- 8 Oct 2026
Overview
8Key is an open-source printed circuit board by BrettZolstick, from the BrettZolstick/MicroKey8 repository on GitHub. It is a 2-layer board of 204.8 × 62.6 mm with 26 parts on 41 nets, routed with 223 tracks and 28 vias.
It is built around the ATMEGA32U4-AU and USB6B1. Its parts include 9 switches, 7 capacitors, 6 resistors, 2 ICs and 1 connector. 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)
USB6B1
SO-8-40℃~+85℃ 10uA 15pF、25pF 2 25A@8/20us 5.25V 500W@8/20us 6V IEC 61000-4-2 TVS SO-8 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)
README
README.mdMicroKey8
An 8 key rhythm game controller that uses microswitches commonly found in mice for short travel and advanced debounce logic.
Project Overview
Build Instructions
Firmware
Parts
26| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | SW_SPDT | PCM_openinput:SW_Micro_Switch | SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 |
| 3 | 100n | Capacitor_SMD:C_0805_2012Metric | C4, C5, C6 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | 18p | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric | R3, R4 |
| 2 | 5k1 | Resistor_SMD:R_0805_2012Metric | R5, R6 |
| 1 | 10u | Capacitor_SMD:C_1206_3216Metric | C7 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | ATmega32U4-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | Crystal_GND24 | Crystal:Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mm | Y1 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | USB6B1 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_GCT_USB4110 | J1 |
Questions
How big is the 8Key PCB?
It measures 204.8 × 62.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 8Key use?
26 parts, built around the ATMEGA32U4-AU and USB6B1. 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 8Key KiCad files?
From the BrettZolstick/MicroKey8 repository on GitHub, at the commit this page was made from: the board is PCB/8Key/8Key.kicad_pcb and its schematic PCB/8Key/8Key.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 8Key design in my own project?
Its repository states no licence, so its author keeps all rights: ask BrettZolstick before reusing the design.
Similar boards
- 2 layers431.5 × 126.8 mm
V6 pcb
reven/V6-conversion
Hardware and firmware to convert a V6 Keychron keyboard to north-facing LEDs.
374 parts - 2 layers58.5 × 80.9 mm
- 4 layers99.6 × 76.2 mm
- 4 layers328.6 × 38.1 mm
- 2 layers109 × 95 mm
- 2 layers100 × 68.5 mm
- 6 layers50 × 50 mm
Xmos xu316
youheng7185/xmos_xu316_cs43131_usb_aud
uac 2.0 on xmos xu316 with cs43131 audio codec
93 parts3