4 layers55 × 55 mm
IEMU Sensor DB
ponderononon/IEMU_DevBoards
Kicad Schematic Files for the BASE and SENSOR Development Boards (Layout in Progress)
125 parts
4 layers32 × 20 mm
Mc screen breakout
sugo14/WatchE-paper smartwatch from scratch
- Size
- 32 × 20 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 59
- Pads
- 149
- Tracks, vias
- 200, 27
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 10 Jul 2026
- Updated
- 1 Aug 2026
Overview
Mc screen breakout is an open-source printed circuit board by sugo14, from the sugo14/Watch repository on GitHub. It is a 4-layer board of 32 × 20 mm with 28 parts on 59 nets, routed with 200 tracks and 27 vias.
It is built around the MDBT50Q-1MV2, CMM-3424DT-26165-TR and NANOT160BP. Its parts include 10 capacitors, 3 diodes, 2 resistors, 2 ICs and 2 connectors. It belongs with the interfaces and adapters boards and the nRF52 and nRF5x boards of this library.
Main components
3
MDBT50Q-1MV2
SMD-61PSMD-61P Bluetooth Modules ROHSRAYTACBluetooth Modules
CMM-3424DT-26165-TR
--26dB -40℃~+100℃ 1.15mm 3mm 4mm 600uA~700uA 65dB Omnidirectional Omnidirectional pickup - MEMS Microphones ROHSCUIMEMS Microphones
NANOT160BP
SMD-40℃~+85℃ 0.55mm 1.65mm 1.6N 15V 2.1mm 20mA 300,000 Cycles IP57 Round Button SMD(SMT) Tab SPST-NO Surface Mount, Right Angle SMD Tactile Switches ROHSC&KTactile Switches
README
README.mdThis is one of my first major electronics projects (post-CanSat)!
Project
The goal of this project is to design a custom smartwatch that fits for my personal use case. That includes:
- Shows the time (obviously)
- Maintains a BLE connection with the associated phone
- Displays notifications
- Displays current song playing on Spotify
- Has a push-to-talk mic
- Streams voice notes to the associated phone, for possible analysis later
Organization
mc-screen-breakout has the first revision of the smartwatch PCB, including the MCU module (containing RF stuff asw), a USB-C port, exposed SWD pins, the screen FPC connector, and the microphone.
watch will contain iterations of the watch PCB that connect to battery and (theoretically) function properly inside the full system, rather than a breakout.
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 10uF | Capacitor_SMD:C_0402_1005Metric | C8, C9, C13 |
| 3 | D_TVS | Diode_SMD:D_0402_1005Metric | D1, D2, D3 |
| 2 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C10, C11 |
| 2 | 12pF | Capacitor_SMD:C_0402_1005Metric | C1, C2 |
| 2 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C3, C5 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | NANOT160BP | NANOT160BP:Untitled | SW1, SW2 |
| 1 | 10uH | Inductor_SMD:L_0603_1608Metric | L1 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric | C12 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | CMM-3424DT-26165-TR | CMM-3424DT-26165-TR:MIC_CMM-3424DT-26165-TR | U1 |
| 1 | FH28-10S-0.5SH_05_ | FH28-10S-0.5SH_05_:HIROSE_FH28-10S-0.5SH_05_ | J2 |
| 1 | GND | TestPoint:TestPoint_Pad_1.0x1.0mm | TP4 |
| 1 | LOGO | sugo-lib:sugo-logo | G*** |
| 1 | MDBT50Q-1MV2 | RF_Module:Raytac_MDBT50Q | U2 |
| 1 | SWCLK | TestPoint:TestPoint_Pad_1.0x1.0mm | TP6 |
| 1 | SWDIO | TestPoint:TestPoint_Pad_1.0x1.0mm | TP5 |
| 1 | USB_C_Receptacle_PowerOnly_6P | Connector_USB:USB_C_Receptacle_Amphenol_124019772112A | J1 |
| 1 | VDD | TestPoint:TestPoint_Pad_1.0x1.0mm | TP3 |
Questions
How big is the Mc screen breakout PCB?
It measures 32 × 20 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Mc screen breakout use?
28 parts, built around the MDBT50Q-1MV2, CMM-3424DT-26165-TR and NANOT160BP. 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 Mc screen breakout KiCad files?
From the sugo14/Watch repository on GitHub, at the commit this page was made from: the board is mc-screen-breakout/mc-screen-breakout.kicad_pcb and its schematic mc-screen-breakout/mc-screen-breakout.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mc screen breakout design in my own project?
Its repository states no licence, so its author keeps all rights: ask sugo14 before reusing the design.
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