4 layers46.5 × 40 mm
2 layers112.2 × 43.3 mm
Pomodorov2
twopoint718/pomodorov2Moving the orientation-sensitive desktop timer (mark II) into its own project
- Size
- 112.2 × 43.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 26
- Nets
- 78
- Pads
- 142
- Tracks, vias
- 19, 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 12 Jul 2022
- Updated
- 30 Aug 2022
Overview
Pomodorov2 is an open-source printed circuit board by twopoint718, from the twopoint718/pomodorov2 repository on GitHub. It is a 2-layer board of 112.2 × 43.3 mm with 26 parts on 78 nets, routed with 19 tracks and 2 vias.
It is built around the MDBT50Q-1MV2 and TC2050-IDC-NL. Its parts include 11 capacitors, 3 resistors, 3 connectors, 3 crystals and 2 inductors. It belongs with the nRF52 and nRF5x boards of this library.
Main components
2README
README.mdPomodoro Mark II "Otter" 🦦
Orientation-sensitive desktop timer (mark II). Codename "Otter" (because they're cute & cuddly, hard-working, and like to roll over).
Technical Specs
- Custom triangular PCB!
- Raytac nRF52840 Bluetooth Low Energy Module with USB - MDBT50Q-1MV2
- Programming header bonanza (some or all): SWD, Tag-Connect TC2050,
SOICbite, and USB. - Bluetooth app/backend for tracking tasks (allocate poms to projects etc.)
- LCD/OLED/Sharp memory display (TBD, prototype is Nokia 5110-type)
- Bosch BNO055 9-DoF orientation sensor/IMU
Project Layout
The project repository (you're looking at it) is laid out at a high level like:
cad3D design files for the case and other supporting mechanical features.docsdocumentation both from a developer and also from the point of view of an end user.firmwarethe software running on the board, any needed bootstrapping code, and support scriptshardwarethe KiCAD schematic and board layoutproductionfiles needed to manufacture the board, BOM, gerbers & etc.
Prototype board
Parts
26| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 12pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C8, C9 |
| 2 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C7 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2 |
| 1 | 0.8pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 1.0uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6 |
| 1 | 100K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 100pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 10uH (DNP?) | Inductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | L1 |
| 1 | 3.9nH | Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | L1 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm_HandSoldering | Y1 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 32MHz | Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm_HandSoldering | Y1 |
| 1 | MDBT50Q-1MV2 | MDBT50Q-1MV2:XCVR_MDBT50Q-1MV2 | U1 |
| 1 | SOICbite | SOICbite:SOIC_clipProgSmall | J3 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | TC2050-IDC | TC2050-IDC:TAG-CONNECT_TC2050-IDC | J2 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Amphenol_10104110_Horizontal | J1 |
Questions
How big is the Pomodorov2 PCB?
It measures 112.2 × 43.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pomodorov2 use?
26 parts, built around the MDBT50Q-1MV2 and TC2050-IDC-NL. 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 Pomodorov2 KiCad files?
From the twopoint718/pomodorov2 repository on GitHub, at the commit this page was made from: the board is hardware/pomodorov2.kicad_pcb and its schematic hardware/pomodorov2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pomodorov2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask twopoint718 before reusing the design.
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