MCompass BOM & 3D Models
本文同时提供以下语言的翻译：
中文.
MCompass Structural Parts (3D Model)
If you have a 3D printer (Bambu Lab series recommended), you can go directly to MakerWorld to download the project files with pre-configured material parameters.
- Official Model: MakerWorld - MCompass (The Lost Compass)
- Printing Suggestions: PLA or PETG is recommended. A black shell with an appropriate infill rate provides a better texture.
Bill of Materials (BOM)
Some parts may differ from those on EasyEDA Open Source Square but are compatible with this design.
Core Chips & Modules
| Category | Name | Specs | Notes |
|---|---|---|---|
| MCU | ESP32-C3-MINI | ||
| Magnetometer | QMC5883L / P | LGA-16 3x3 | L is discontinued (mostly refurbished), P is recommended |
| GPS | ATGM336H-5N71 | 13.1x15.7mm | Ceramic antenna included |
| LED | WS2812B 0807 | 1.7x2.0x0.85mm | 42 pcs required, frosted beads recommended |
| Battery | 213455 Li-Po | 500mAh | Size must strictly match the shell space |
Critical Components
- LDO: AP2112K-3.3 or ME6211 (budget-friendly)
- Charger: MCP73831
- USB Port: GT-USB-7010ASV (USB-C 16P)
- Fasteners:
- Knurled Nuts: M2x3x3.2 (heat-set into the shell)
- Screws: M2x4 Hex Socket
Selection Advice & Troubleshooting
- C1206 100uF Capacitor: Not mandatory. If you encounter abnormal LED colors or flickering (high power ripple), be sure to solder this capacitor.
- Type-C 5.1K Resistors: Located at CC1/CC2. If not soldered, dual-head Type-C cables will not be recognized (only A-to-C cables will work).
- Diffuser Material (Crucial):
- It is recommended to use 1.0mm semi-transparent black acrylic as the front panel.
- Use with PET LGT075J diffuser film to make the LED pixels more uniform and less glaring.
MCompass BOM & 3D Models
