2 layers227.8 × 80.2 mm
2 layers99.6 × 43.3 mm
Infernum breakout
calvin-mcd/Infernum-HS4Hotswap PCB version of Haizeus' Infernum keyboard
- Size
- 99.6 × 43.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 144
- Nets
- 125
- Pads
- 729
- Tracks, vias
- 1,112, 110
- Pours
- 267
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 7 Dec 2023
- Updated
- 10 Jul 2025
Overview
Infernum breakout is an open-source printed circuit board by calvin-mcd, from the calvin-mcd/Infernum-HS repository on GitHub. It is a 2-layer board of 99.6 × 43.3 mm with 144 parts on 125 nets, routed with 1,112 tracks and 110 vias.
It is built around the 74AHCT1G125SE, PRTR5V0U2X and XC6206P202MR-G, with the WS2812B-2020 and SKQGABE010 among its other parts. Its parts include 60 diodes, 11 capacitors, 6 resistors, 6 ICs and 5 switches. It belongs with the keyboards and input and interfaces and adapters boards and the STM32 boards of this library.
Main components
5
74AHCT1G125SE
SOT-353-40℃~+125℃ 1 1 4.5V~5.5V 4.7ns@5V,50pF 40uA 74AHCT 8mA 8mA Schmitt trigger Tri-State Unidirectional SOT-353 Buffers, Drivers, Receivers, Transceivers ROHSDiodes IncorporatedBuffers, Drivers, Receivers, Transceivers
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 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)
XC6206P202MR-G
SOT-23-40℃~+85℃@(Ta) 1 120mA 1uA 2V 6V 780mV@(100mA) Fixed Over Current Protection Positive SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
WS2812B-2020
SMD,2.2x2mm0.6mA 0.84mm 120us 160mcd 200mcd 2kHz 2mm 2mm 300ns 470.4nm 515.6nm 520mcd 5V 622.5nm 800Kbit/s Built-in power-on reset circuit、Built-in power-on reset circuit、Integrated intelligent reverse connection protection function Top-mount SMD,2.2x2mm RGB LEDs(Built-in IC) ROHSWorldsemiRGB LEDs(Built-In IC)
SKQGABE010
SMD-4P,5.2x5.2mm-40℃~+90℃ 1,000,000 cycles 1.5mm 1.6N 12V 5.2mm 5.2mm 50mA Round Button SPST-NO Surface Mount,Vertical SMD-4P,5.2x5.2mm Tactile Switches ROHSALPSALPINETactile Switches
README
README.mdInfernum-HS
Hotswap PCB version of Haizeus' Infernum keyboard
Layout
Disclaimer
This PCB has been fully tested and confirmed to work. The members of the PCB development team are however not liable if you end up with a non-functional pcb. Order at your own risk. Support will not be provided but pull requests will be reviewed and possibly accepted.
License
Shield: 
This work is licensed under a
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Credits
Any questions, contact haizeus & Calvin0563 on Discord.
Parts
144| Qty | Value | Footprint | References |
|---|---|---|---|
| 38 | MX-NoLED | marbastlib-mx:SW_MX_HS_1u | MX1, MX2, MX10, MX11, MX12, MX13, MX14, MX15, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX23 +22 |
| 38 | SOD-123 | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +22 |
| 22 | WS2812B-2020 | PCM_marbastlib-various:LED_WS2812_2020 | D39, D40, D41, D42, D43, D44, D45, D46, D47, D48, D49, D50, D51, D52, D53, D54 +6 |
| 6 | 100nf | Capacitor_SMD:C_0402_1005Metric | C16, C17, C18, C19, C20, C22 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R3, R6 |
| 3 | 4u7 | Capacitor_SMD:C_0402_1005Metric | C1, C3, C4 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric | C_LDO1, C_LDO2 |
| 2 | 3u | PCM_marbastlib-mx:STAB_MX_P_3u | S3, S4 |
| 2 | 4k7 | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R_USB1, R_USB2 |
| 2 | MX-NoLED | marbastlib-mx:SW_MX_HS_1.25u | MX57, MX58 |
| 2 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW1, SW2 |
| 1 | 100n | Capacitor_SMD:C_0402_1005Metric | C2 |
| 1 | 10uF | Capacitor_SMD:C_0402_1005Metric | C21 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R_Shield1 |
| 1 | 39 | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | 4.7n | Capacitor_SMD:C_0402_1005Metric | C_Shield1 |
| 1 | 500mA | Fuse:Fuse_0805_2012Metric | F1 |
| 1 | 74AHCT1G125 | Package_TO_SOT_SMD:SOT-23-5 | U5 |
| 1 | Conn_01x03_Socket | Connector_PinHeader_2.00mm:PinHeader_1x03_P2.00mm_Vertical | J3 |
| 1 | Conn_01x05_Socket | Connector_PinHeader_2.00mm:PinHeader_1x06_P2.00mm_Vertical | J1 |
| 1 | HRO-TYPE-C-31-M-12 | cipulot_parts:HRO-TYPE-C-31-M-12-Assembly | USB1 |
| 1 | LOGO | LOGO | G*** |
| 1 | PMW3360DM-T2QU_1 | Ariamelon-Package:PixArt_PMW3360DM-T2QU | U6 |
| 1 | PRTR5V0U2X | random-keyboard-parts:SOT143B | U4 |
| 1 | SKQGABE010 | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | SW5 |
| 1 | SM04B | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J2 |
| 1 | STM32F072CBUx | Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U1 |
| 1 | XC6206P202MR | Ariamelon-Package:SOT-23-3 | U2 |
| 1 | XC6206PxxxMR | Package_TO_SOT_SMD:SOT-23 | U3 |
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Questions
How big is the Infernum breakout PCB?
It measures 99.6 × 43.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Infernum breakout use?
144 parts, built around the 74AHCT1G125SE, PRTR5V0U2X, XC6206P202MR-G and WS2812B-2020. 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 Infernum breakout KiCad files?
From the calvin-mcd/Infernum-HS repository on GitHub, at the commit this page was made from: the board is Project/Infernum breakout.kicad_pcb and its schematic Project/Infernum HS.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Infernum breakout design in my own project?
Its repository states no licence, so its author keeps all rights: ask calvin-mcd before reusing the design.