2 layers22.9 × 63.5 mm
Esp rust board
swayerloren/KICAD_ENGINE
AI-assisted KiCad PCB design workflow for schematics, PCB layouts, DRC, BOM/CPL, and fabrication outputs using Codex or Claude.
96 parts10MIT
2 layers346.2 × 95.5 mm
Mkey
MabezDev/mkey16A mechanical keyboard based on an ESP32-S3
- Size
- 346.2 × 95.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 171
- Nets
- 116
- Pads
- 641
- Tracks, vias
- 875, 199
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 24 Sep 2023
- Updated
- 23 Oct 2026
Overview
Mkey is an open-source printed circuit board by MabezDev, from the MabezDev/mkey repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 346.2 × 95.5 mm with 171 parts on 116 nets, routed with 875 tracks and 199 vias.
It is built around the ESP32-S3-WROOM-1-N8, SY8088A and B5819W, with the PESD3V3L1BA,115 and SP0503BAHTG among its other parts. Its parts include 69 diodes, 9 resistors, 8 capacitors, 6 switches and 2 ICs. It belongs with the keyboards and input boards and the ESP32 boards of this library.
Main components
5
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
SY8088A
SOT-23-5SOT-23-5 DC-DC Converters ROHSTECH PUBLICDC-DC Converters
B5819W
SOD-123-55℃~+125℃ 1.5A 1mA@40V 25A 40V 600mV@1A Standalone SOD-123 Schottky Diodes ROHSMDDSchottky Diodes
PESD3V3L1BA,115
SOD-323ESD And Surge Protection (TVS/ESD)HXY MOSFET
SP0503BAHTG
SOT-143-55℃~+125℃ 10A@8/20us 14V 150W@8/20us 30pF、60pF 5.5V 6V 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
README
README.mdmKey
A mechanical keyboard based on an ESP32-S3, with firmware written in Rust.
Click here to view the PCB & Schematic interactively in the browser
Flashing
The USB port is intended for flashing, as well as software USB usage. Version 1.0 of the board however has the DP and DM pins swapped, therefore to flash the board from the factory (or if the flash is wiped for any reason) you must flash via UART0. The pinout is as follows:
- TX is connected to the input side of D2 (COL1)
- RX is conncted to the input side of D3 (COL2)
License
Licensed under either of:
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
- CERN-OHL for the hardware files
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
Contributions to the hardware will be licensed under the CERN-OHL license.
Parts
171| Qty | Value | Footprint | References |
|---|---|---|---|
| 66 | D_Small | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +50 |
| 56 | MX_SW_solder | PCM_marbastlib-mx:SW_MX_1u | MX1, MX2, MX10, MX11, MX12, MX13, MX14, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX23, MX24 +40 |
| 8 | MX_SW_solder | PCM_marbastlib-mx:SW_MX_1.25u | MX42, MX56, MX57, MX58, MX60, MX61, MX62, MX63 |
| 4 | , , , | ||
| 3 | 10kR 1% | Resistor_SMD:R_0603_1608Metric | R1, R2, R7 |
| 2 | 10uF 16V | Capacitor_SMD:C_0805_2012Metric | C2, C4 |
| 2 | 1uF 16V | Capacitor_SMD:C_0603_1608Metric | C1, C5 |
| 2 | 5k1R 1% | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | LOGO | GRAPHICS:mkey | G***, G*** |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_PTS810 | SW0, SW1 |
| 1 | 0R 1% | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 100kR 1% | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 100nF 10V | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 10nF 10V | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 1nF 10V | Capacitor_SMD:C_0603_1608Metric | C8 |
| 1 | 22k1R 1% | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 22pF 50V | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 24 pin LCD FPC connector | 24P_LCD_CONN:CONN-SMD_24P-P0.40_X0400FVS-24-LPSN-LINEAR | J2 |
| 1 | 51.1R 1% | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | B5819W | Diode_SMD:D_SOD-123 | D67 |
| 1 | ESP32-S3-WROOM-1 | PCM_Espressif:ESP32-S3-WROOM-1 | U1 |
| 1 | LOGO | GRAPHICS:qr | G*** |
| 1 | MX_SW_solder | PCM_marbastlib-mx:SW_MX_1.5u | MX15 |
| 1 | MX_SW_solder | PCM_marbastlib-mx:SW_MX_1.75u | MX29 |
| 1 | MX_stab | PCM_marbastlib-mx:STAB_MX_P_2u | S2 |
| 1 | MX_stab | PCM_marbastlib-mx:STAB_MX_P_6.25u | S1 |
| 1 | MX_stab | PCM_marbastlib-mx:STAB_MX_ISO-ROT | S5 |
| 1 | MX_stab | PCM_marbastlib-mx:STAB_MX_P_2.75u | S4 |
| 1 | PESD3V3L1BA,115 | Diode_SMD:D_SOD-323 | D68 |
| 1 | SP0503BAHT | Package_TO_SOT_SMD:SOT-143 | D69 |
| 1 | SPH4018H2R2MT (2.2uH 2.2A) | Inductor_SMD:L_Bourns-SRN4018 | L1 |
| 1 | SY8088 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | USB_C_REP_2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
The 170 most common of 171 parts.
Questions
How big is the Mkey PCB?
It measures 346.2 × 95.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mkey use?
171 parts, built around the ESP32-S3-WROOM-1-N8, SY8088A, B5819W and PESD3V3L1BA,115. 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 Mkey KiCad files?
From the MabezDev/mkey repository on GitHub, at the commit this page was made from: the board is hardware/board/mkey.kicad_pcb and its schematic hardware/board/mkey.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mkey design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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