IoT Vibration Sensor PCB design for JLCPCB

**Project Title:** Industrial Vibration Monitoring PCB Design (Schematic + 4-Layer Layout) – JLCPCB Compatible **Project Description:** We need a complete PCB design for an industrial IoT vibration sensor used in predictive maintenance of rotating machinery (motors, pumps, fans, gearboxes). **Important:** All components must be available on **JLCPCB / LCSC**. Prefer parts that are in stock or have good availability. Avoid parts that require consignment unless absolutely necessary. **Scope of Work:** - Full schematic design - 4-layer PCB layout - Component placement, routing, and silkscreen - BOM with **JLCPCB/LCSC part numbers** - Design notes (power sequencing, sensor power-down, RF layout) **Key Requirements:** **Core Components (use JLCPCB-available equivalents or exact parts):** - IIS3DWBTR (ST tri-axial vibration sensor) on SPI — available on LCSC - STM32H563 (LQFP package preferred) — Cortex-M33 MCU with 640 KB RAM and 2 MB dual-bank flash (confirm LCSC availability) - EG800QEULC (Quectel LTE Cat-1 bis module) — if not on LCSC, note it as consign; otherwise use available alternative **Power:** - 24 V industrial input (9–36 V range) - Reverse polarity protection + TVS + fuse (JLCPCB stock) - TLV62568 or equivalent buck converter for main 3.3 V rail (JLCPCB stock) - TPS7A2033 or equivalent low-noise LDO dedicated to the vibration sensor (JLCPCB stock preferred) - Ability to fully power down the IIS3DWB when not measuring **Other:** - LTE antenna connector (SMA preferred, JLCPCB stock) - SWD debug connector - Status LEDs and reset button - Mounting holes for IP67 enclosure - All passives, crystals, ferrite beads, and connectors must be JLCPCB stock parts **What We Are Removing from Previous Design:** ADXL357, FRAM, PSRAM, external flash, RA8 MCU, Wi-Fi/BLE chips, and battery charger. This version should be simpler and lower cost. **Deliverables:** 1. Schematic files (KiCad or Altium) 2. 4-layer PCB layout (Gerber + fabrication files) 3. **BOM with JLCPCB/LCSC part numbers** (clearly marked if any part must be consigned) 4. Brief design notes **Skills Required:** - Experience with industrial IoT / sensor PCB design - Familiarity with LTE modules and RF layout - Knowledge of STM32 and low-noise analog design - KiCad or Altium - **Experience designing boards for JLCPCB assembly** **Timeline:** Please share your estimated delivery time with the proposal. **Budget:** Share your quote based on the scope above. Please include examples of similar industrial sensor or IoT PCB designs you have completed, especially any that were assembled at JLCPCB.