4 layers228.2 × 80.6 mm
2 layers432.2 × 143 mm
ScottoModules
CalamityCow/MacOS-KeyboardTwo modules based on the STM32F072CBT6 to make integrated MCU PCBs simpler. They're designed to sit between 2 switches on an ortholinear or row-staggered keyboard, column-staggered will require some manual moving to get…
- Size
- 432.2 × 143 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 440
- Nets
- 255
- Pads
- 1,683
- Tracks, vias
- 2,751, 471
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 22 Nov 2025
- Updated
- 7 Dec 2025
Overview
ScottoModules is an open-source printed circuit board by CalamityCow, from the CalamityCow/MacOS-Keyboard repository on GitHub. It is a 2-layer board of 432.2 × 143 mm with 440 parts on 255 nets, routed with 2,751 tracks and 471 vias.
It is built around the 74AHCT125D, USBLC6-2SC6 and XC6206-2.8V, with the CL05B104KB54PNC and SK6812MINI-E among its other parts. Its parts include 115 capacitors, 103 switches, 101 diodes, 5 resistors and 4 ICs. It belongs with the STM32 boards of this library.
Main components
5
74AHCT125D
SOP-14-40℃~+125℃ 1 4 4.3ns@5V,50pF 4.5V~5.5V 40uA 74AHCT 8mA 8mA Schmitt trigger Tri-State Unidirectional SOP-14 Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffer/Driver/Transceiver
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
XC6206-2.8V
SOT-23-3L-40℃~+85℃@(Ta) 1 1uA 2.8V 250mA 350mV@(30mA) 6V Fixed Over Current Protection Positive SOT-23-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSYONGYUTAIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
CL05B104KB54PNC
0402100nF 50V X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
README
MacOS Keyboard/STM32F072CBT6/README.mdScottoModules
Two modules based on the STM32F072CBT6 to make integrated MCU PCBs simpler. They're designed to sit between 2 switches on an ortholinear or row-staggered keyboard, column-staggered will require some manual moving to get them to fit correctly.
Bill of Materials (BOM)
| Quantity | Part | LCSC |
|---|---|---|
| 1 | STM32F072CBT6 (LQFP-48_7x7) | C81720 |
| 1 | XC6206 (SOT-23-3L) | C5446 |
| 1 | USBLC6-2SC6 (SOT-23-6) | C2827654 |
| 1 | TL3342 | C115351 |
| 1 | USB_C_HRO_TYPE-C-31-M-12 | C165948 |
| 2 | 5.1k Resistor (0402) | C25905 |
| 1 | 10k Resistor (0402) | C25744 |
| 1 | 500mA Fuse (0603) | C210357 |
| 3 | 1uF Capacitor (0402) | C52923 |
| 1 | 10nF Capacitor (0402) | C15195 |
| 2 | 4.7uF Capacitor (0402) | C23733 |
| 5 | 100nF Capacitor (0402) | C307331 |
Usage
-
The project is setup as a Kicad template, first open Kicad and select "New Project from Template..." from the file menu.
-
Next click the folder icon and navigate to where you saved the
ScottoModules/STM32F072CBT6folder and open it. -
Select
ScottoModules (STM32)and clickOK. -
Name your project and save it somewhere.
-
You're now ready to start using ScottoModules!
Kicad Template Folder
Alternatively, you can save ScottoModules/STM32F072CBT6 to your Kicad templates folder and not have to manually load it each time.
- Mac - /Users/YOUR_USERNAME/Documents/KiCad/8.0/template/
- Windows - C:\Users\YOUR_USERNAME\Documents\KiCad\8.0\template\
Parts
440| Qty | Value | Footprint | References |
|---|---|---|---|
| 109 | 100nF | ScottoKeebs_Components:Capacitor_0402 | C7, C10, C11, C13, C16, DisplayLEDCAP1, DisplayLEDCAP2, DisplayLEDCAP3, LEDCAP1, LEDCAP10, LEDCAP11, LEDCAP12, LEDCAP13, LEDCAP14, LEDCAP100, LEDCAP101 +93 |
| 104 | SK6812MINI | ScottoKeebs_Components:LED_SK6812MINI | DisplayLED1, DisplayLED2, DisplayLED3, LED1, LED10, LED11, LED12, LED13, LED14, LED15, LED16, LED17, LED18, LED19, LED100, LED101 +88 |
| 101 | Diode | ScottoKeebs_Components:Diode_DO-35 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D100, D101 +85 |
| 101 | Keyswitch | ScottoKeebs_Hotswap:Hotswap_MX_1.00u | S1, S2, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S100, S101 +85 |
| 6 | 100uF | ScottoKeebs_Components:Capacitor_0402 | LEDBULKCAP1, LEDBULKCAP2, LEDBULKCAP3, LEDBULKCAP4, LEDBULKCAP5, LEDBULKCAP6 |
| 3 | 1uF | ScottoKeebs_Components:Capacitor_0402 | C8, C9, C15 |
| 2 | 4.7uF | ScottoKeebs_Components:Capacitor_0402 | C12, C17 |
| 2 | 5.1k | ScottoKeebs_Components:Resistor_0402 | R2, R3 |
| 2 | 500R | ScottoKeebs_Components:Resistor_0402 | R4, R5 |
| 1 | 10k | ScottoKeebs_Components:Resistor_0402 | R1 |
| 1 | 10nF | ScottoKeebs_Components:Capacitor_0402 | C14 |
| 1 | 500mA | ScottoKeebs_Components:Fuse_0603 | F1 |
| 1 | 74AHCT125 | Package_DIP:DIP-14_W7.62mm | U2 |
| 1 | RotaryEncoder | Rotary_Encoder:RotaryEncoder_Alps_EC11E_Vertical_H20mm | SW2 |
| 1 | STM32F072CBTx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SW_Push | ScottoKeebs_Components:Button_TL3342 | SW1 |
| 1 | USBLC6-2SC6 | ScottoKeebs_Components:ESD_SOT-23-6 | U4 |
| 1 | USB_C | ScottoKeebs_Components:USB_C_HRO_TYPE-C-31-M-12 | J1 |
| 1 | XC6206 | ScottoKeebs_Components:Voltage_SOT-23 | U3 |
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Questions
How big is the ScottoModules PCB?
It measures 432.2 × 143 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ScottoModules use?
440 parts, built around the 74AHCT125D, USBLC6-2SC6, XC6206-2.8V and CL05B104KB54PNC. 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 ScottoModules KiCad files?
From the CalamityCow/MacOS-Keyboard repository on GitHub, at the commit this page was made from: the board is MacOS Keyboard/STM32F072CBT6/ScottoModules.kicad_pcb and its schematic MacOS Keyboard/STM32F072CBT6/LED.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ScottoModules design in my own project?
Its repository states no licence, so its author keeps all rights: ask CalamityCow before reusing the design.