Junior Bluetooth Sensor PCB Design

I have a concept for a compact, microcontroller-based board that must talk to external sensors over Bluetooth only—no Wi-Fi or cellular. The goal is to move from idea to fabrication-ready files while keeping the layout simple enough for a junior-level approach but robust enough for reliable production.

The board will host a low-power MCU, a prefabricated or chip-down Bluetooth solution, and headers for a few digital sensors (I²C or SPI). Size should stay roughly within 50 × 50 mm, two–four layers, and follow standard manufacturing rules. I will supply the high-level block diagram; component selection, schematic capture, and full routing are part of the assignment. Careful attention to antenna placement, impedance control around the RF section, and clean power routing is essential for trouble-free wireless performance.

Deliverables
• Editable schematic and PCB layout files (KiCad, Altium, or EasyEDA—your choice, so long as they are exportable)
• Production-ready Gerbers, drill files, and pick-and-place data
• Complete BOM with distributor part numbers and availability notes
• Brief design report highlighting RF considerations and test points

Acceptance criteria
• All ERC/DRC errors resolved
• Bluetooth antenna kept in a clearance zone per vendor guidelines
• Board outline and mounting holes match the mechanical drawing I provide
• Files generate without warnings on JLCPCB or PCBWay pre-check tools

Timeline is flexible but I’d like first schematics within a week so we can review together before you proceed to routing. If this goes smoothly there will be follow-on revisions for additional sensor variants, so clean, well-documented work is important.