Phone Case Electronics

I’ve completed the physical shell for a phone case with a built-in drawer. I now need a freelancer to design and prototype the **electronics + firmware** that detects drawer activity and reliably sends events to the phone/app which I have already developed. (what I need built): * Recommend the best sensing approach to detect **drawer open/close** (magnetic reed/Hall, microswitch, optical, etc.) and design around the case constraints. * Select components and create a complete electronics design: * **Low-power microcontroller + BLE** (or comparable phone connectivity) * Sensor(s) for drawer state * Battery + charging solution (or wired power if strongly recommended) * LED indicator (subtle, optional but preferred) * Provide: * Schematic, BOM, and PCB layout (compact, manufacturable) * Firmware that broadcasts drawer events to the phone (BLE event + timestamp) * Basic power optimization (sleep modes, battery life plan) * Assembly guidance + wiring/placement instructions to fit the existing case shell * Prototype support: help validate that the hardware works reliably inside the case (debounce, false trigger prevention, signal stability). Key requirements: * Drawer event detection must be **accurate and repeatable** (no false opens in a pocket/bag). * Must fit within a tight form factor and not interfere with drawer motion or phone use. * Battery life should be practical for daily use (low-power design is important). * Deliverables must be clear enough for me to hand off to manufacturing later. Nice to have: * Experience with wearable/IoT hardware, BLE peripherals, and ultra-low-power design. * Suggestions for DFM and scalable manufacturing.

N° de projet : 40235838