2 layers192.2 × 150.5 mm
4 layers76 × 75.1 mm
Kobold
tzarc/keyboards993@tzarc's custom keyboard designs.
- Size
- 76 × 75.1 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 104
- Nets
- 84
- Pads
- 493
- Tracks, vias
- 971, 220
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 22 Oct 2020
- Updated
- 16 Apr 2025
Overview
Kobold is an open-source printed circuit board by tzarc, from the tzarc/keyboards repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 4-layer board of 76 × 75.1 mm with 104 parts on 84 nets, routed with 971 tracks and 220 vias.
It is built around the STM32G431CBU6, W25Q128JVSIQ and SN74LVC1G14DRL, with the SN74AHC1G08DRL, H5VU25U and H5VL10B among its other parts. Its parts include 27 capacitors, 19 switches, 18 diodes, 16 ICs and 13 resistors. It belongs with the keyboards and input boards and the STM32 boards of this library.
Main components
7
STM32G431CBU6
UFQFPN-48(7x7)-40℃~+85℃ 1.71V~3.6V 128KB 12bit 12bit 170MHz 32 Bit 32KB 42 ARM Cortex-M4F Built-in FLASH UFQFPN-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
SN74LVC1G14DRL
SOTFL-5Single Schmitt-Trigger InverterTexas InstrumentsUncategorised
SN74AHC1G08DRL
SOT-5-55℃~+125℃ 1 1.5V~3.85V 1.9V、2.48V、3.8V 100mV、360mV、440mV 1uA 2 2V~5.5V 500mV~1.65V 7.9ns@5V,50pF 74AHC Series 8mA 8mA AND Gate Overvoltage-tolerant input Push-pull Schmitt trigger SOT-5 Logic Gates ROHSTexas InstrumentsLogic Gates
H5VU25U
DFN2510-10L-55℃~+125℃ 0.5pF 14V 1uA 4A 56W 5V 6V Four channels IEC 61000-4-2、IEC 61000-4-5 TVS Unidirectional DFN2510-10L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
H5VL10B
DFN1006-2L-55℃~+125℃ 1 100nA 10V 15pF 5.6V 50W 5A 5V Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5 DFN1006-2L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
TYPE-C-31-M-12
SMD-30℃~+80℃ 1 10,000 cycles 16P 20V 5A 7.35mm Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSHRO ElectronicsUSB Connectors
README
README.md@tzarc's Keyboards.
Here you'll find the design files for @tzarc's custom keyboard designs.
Since February 2024, licenses have changed from GPL3 to CERN-OHL-S.
Djinn
The Djinn is a 64-key split keyboard -- dual 4x7 with a 4-key thumb cluster. It also has a 5-way tactile switch under the thumb.
Ghoul
The Ghoul is a Planck-like development board for QMK, using SparkFun MicroMod for hot-swap MCU capability in a 2x4x5=40 layout with encoder and RGB OLED, per-key RGB.
Kobold
The Kobold is an ortho 4x4 macropad, as a replacement for a bm16s with modern hardware.
Parts
104| Qty | Value | Footprint | References |
|---|---|---|---|
| 21 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23 +5 |
| 16 | Push | PCM_marbastlib-choc:SW_choc_v1_HS_CPG135001S30_1u | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12, SW13, SW14, SW15, SW16 |
| 8 | RGB | Kobold:LED_choc_6028R-ROT | D5, D6, D7, D8, D13, D14, D15, D16 |
| 8 | RGB | Kobold:LED_choc_6028R | D1, D2, D3, D4, D9, D10, D11, D12 |
| 7 | SN74LVC1G14DRL | LCSC:SOT-553-5_L1.6-W1.2-P0.50-LS1.6-BL | U1, U2, U9, U11, U13, U15, U16 |
| 6 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R6, R7, R8, R11, R12 |
| 6 | 4.7u | Capacitor_SMD:C_0402_1005Metric | C4, C5, C6, C7, C8, C9 |
| 4 | 2mm | MountingHole:MountingHole_2.2mm_M2_Pad | H1, H2, H3, H4 |
| 4 | 75k | Resistor_SMD:R_0603_1608Metric | R2, R4, R5, R9 |
| 3 | SN74AHC1G08DRL | LCSC:SOT-553-5_L1.6-W1.2-P0.50-LS1.6-BL | U10, U12, U14 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R10, R13 |
| 1 | 0.05R | Resistor_SMD:R_1206_3216Metric | R3 |
| 1 | 1N4148 | Diode_SMD:D_SOD-323 | D18 |
| 1 | AP2552FDC-7 | LCSC:WDFN-6_L2.0-W2.0-P0.65-BL-EP-1 | U3 |
| 1 | BOOT0 | LCSC:SW-SMD_4P-L3.0-W2.6-P1.80-LS3.4-TL | SW17 |
| 1 | DFU | LCSC:SW-SMD_4P-L3.0-W2.6-P1.80-LS3.4-TL | SW18 |
| 1 | G*** | kibuzzard-677E65D8 | kibuzzard-677E65D8 |
| 1 | G*** | kibuzzard-677E6634 | kibuzzard-677E6634 |
| 1 | G*** | kibuzzard-677E65DF | kibuzzard-677E65DF |
| 1 | G*** | kibuzzard-677E6627 | kibuzzard-677E6627 |
| 1 | G*** | kibuzzard-677E65CD | kibuzzard-677E65CD |
| 1 | H5VL10B | Diode_SMD:D_SOD-882 | D17 |
| 1 | H5VU25U | LCSC:DFN2510-10_L2.5-W1.0-P0.50-BL | U6 |
| 1 | INA180A4 | LCSC:SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BR | U5 |
| 1 | STM32G431CBU6 | Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U7 |
| 1 | TC2030 | Connector:Tag-Connect_TC2030-IDC-FP_2x03_P1.27mm_Vertical | J2 |
| 1 | TYPE-C-31-M-12 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | W25Q128JVSIQ | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U8 |
| 1 | XC6206PxxxMR | Package_TO_SOT_SMD:SOT-23-3 | U4 |
| 1 | nRST | LCSC:SW-SMD_4P-L3.0-W2.6-P1.80-LS3.4-TL | SW19 |
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Questions
How big is the Kobold PCB?
It measures 76 × 75.1 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Kobold use?
104 parts, built around the STM32G431CBU6, W25Q128JVSIQ, SN74LVC1G14DRL and SN74AHC1G08DRL. 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 Kobold KiCad files?
From the tzarc/keyboards repository on GitHub, at the commit this page was made from: the board is Kobold/R1/Kobold.kicad_pcb and its schematic Ghoul/v1.0/ghoul.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Kobold design in my own project?
Its repository publishes it under the CERN-OHL-S-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).