IMPORTANT — NDA REQUIRED The freelancer must sign an NDA (Non-Disclosure Agreement) before receiving any detailed documents. No part of this design, concept, internal mechanism or visuals may be shared publicly or reused in other projects. ⸻ PROJECT OVERVIEW We are developing a next-generation smart toothbrush for a private medical technology platform. This is a consumer-grade physical product requiring a premium, modern, clinical design similar to Apple / Dyson quality. The toothbrush must include one powerful core feature in the first version, and the internal structure must support multiple future hardware upgrades without changing the outer body. ⸻ VERSION 1 — MUST-HAVE SIGNATURE FEATURE The first prototype must include at least ONE compelling function: Smart Pressure Tracking + Live Brushing Feedback LED Ring • Built-in precision pressure sensor • LED ring changes color depending on brushing pressure • Green — optimal • Yellow — low pressure • Red — high pressure • Logged brushing session data (via BLE) SCOPE OF WORK (DETAILED) 1. 3D Industrial Design • Full external body design • Replaceable brush head • LED feedback ring (top or near brush head) • Waterproof IPX7 body • Ergonomic grip • Hidden button system ⸻ 2. Internal Engineering Layout You must design: • Motor cavity • Battery compartment • PCB mounting area • Pressure sensor position • Internal LED ring channel • AND EMPTY RESERVE ZONES for: • future optical sensor • future infrared window • future temperature sensor • future additional PCB extension • future wireless charging coil (if not added now) These are empty placeholders only — to ensure upgradeability. ⸻ 3. Deliverables You must provide: A. 3D Production Files • .STEP • .STL • .OBJ • .FBX (optional) B. 3D Renders • 6–10 premium realistic renders • White background + marketing-style angles C. Animation (REQUIRED) Choose one: Option 1 — Short Animation (8–12 sec) • Full rotation • LED ring demonstration • Exploded internal view • Motor + battery + PCB placement Option 2 — Web-ready 3D model • .glb or .gltf • Optimized for embedding into a website (Three.js / Model Viewer) (At least one of the two animation formats MUST be delivered.) ⸻ TECHNICAL REQUIREMENTS Minimal Required Components (Version 1) • Sonic vibration motor • Rechargeable battery • PCB with BLE • Pressure sensor • LED feedback ring • Button (hidden or flush) • IPX7 waterproof inner chassis Future Components (Placeholder ONLY) • Optical spectral sensor • Micro temperature sensor • Infrared window • Extra microcontroller socket • Sensor expansion ports • Wireless charging coil space (These components are NOT added in V1 — only physical space is reserved) ⸻ WHAT WE PROVIDE AFTER NDA After NDA is signed, we will provide: 1. Full technical specification PDF 2. Internal sensor measurements 3. PCB size reference 4. Branding palette 5. Animation samples 6. Usage scenarios 7. Human-factors ergonomics notes 8. Final dimension requirements ⸻ BUDGET We are looking for high-quality work. • Full package budget: $450 – $900 (depending on experience and animation quality) We are NOT looking for cheap mass-produced designs. We prefer designers with proven experience in smart devices. ⸻ TIMELINE • Concept drafts: 7 days • Final 3D model: 14 days • Animation: 3–7 days Total expected: 21–28 days ⸻ TO APPLY Send: • Portfolio of consumer electronics • 1–2 example animations • Confirmation of NDA acceptance • Estimated timeline & cost ⸻ RESTRICTIONS • You may NOT share this project anywhere • You may NOT reuse this design • You may NOT post it in your portfolio • You may NOT discuss the project with third parties • Violating these terms terminates the contract immediately