Table of Contents
System Integration
System Diagram
Production Processes
3D Printing the Watch Case
Once the design is finalized, the watch case is 3D printed using TPU (Thermoplastic Polyurethane) material. 3D printing allows for precise manufacturing of complex shapes and ensures that each watch case is uniform in quality.Milling the Mold
The next step involves milling the mold for casting the watch case using wax. A CNC (Computer Numerical Control) milling machine is used to carve out the mold based on the 3D design. This process ensures accuracy and consistency in the production of molds.Casting the Watch Case
Silicone rubber is used to cast the watch case from the wax mold. Silicone is chosen for its flexibility, durability, and ability to replicate intricate details. The silicone is poured into the mold and allowed to cure, forming the final watch case.Tasks & Schedule
BOM
| SL No | Material | Amount | Place of Procurement |
|---|---|---|---|
| 1 | Seeed XIAO nRF52840 Sense | ₹1,899.00 | Lab |
| 2 | 0.96 Inch I2C/IIC 4-Pin OLED Display Module | ₹162.00 | Lab |
| 3 | 40 mAh 3.7V single cell Rechargeable LiPo Battery | ₹119.00 | Penta Menaka |
| 4 | LED RGB CLEAR 4PLCC SMD | ₹19.00 | Lab |
| 5 | Coin vibration motor | ₹100.00 | Penta Menaka |
| 6 | eSun ePLA+HS 3D Printing Filament- 1.75mm White | ₹299.00 (3 hours) | Lab |
| 7 | 3D Printing Filament Black PLA | ₹199.00 (2 hours) | Lab |
| 8 | SeSun eTPU-95A 3D Printing Filament-Transparent Purple | ₹99.00 (1 hour) | Lab |
| 9 | M2 nut and bolt x 20mm | ₹200 | Lab |
| 10 | 3mm Waterproof Rubber Sheet | ₹50 | Lab |
| Total | ₹3,146.00 | ||
| Personal Expenses | ₹220.00 | ||
Operation & Features
Mode of Operation
Setting Targets
Users can set their target time and speed for their swimming sessions through a dedicated smartphone app. The app provides a user-friendly interface to input and adjust these targets easily.Real-Time Data Updates
The Aqua Sense smartwatch is integrated with the smartphone app to provide real-time updates on various swimming metrics. The app displays data such as speed, time, and the number of laps completed.Monitoring and Alerts
Speed and Time Monitoring
The watch continuously monitors the swimmer's speed and elapsed time. It uses sensors and the Seeed XIAO nRF52840 Sense to track these parameters accurately.Lap Counting
The watch also counts the number of laps completed, providing swimmers with precise tracking of their workout.Feedback Mechanisms
Vibration Alerts
If the swimmer's speed falls below the set target or if they are not meeting the target time, the watch sends vibration alerts. These alerts help swimmers adjust their pace without needing to look at the watch.Neopixel LED Indications
The watch uses NeoPixel WS2812 RGB addressable LEDs to provide visual feedback. The LEDs change color based on the swimmer's performance:Less Speed: A specific color (e.g., red) indicates that the swimmer's speed is below the target.
High Speed: Another color (e.g., green) indicates that the swimmer's speed is above the target.
Meeting Targets: A neutral color (e.g., blue) indicates that the swimmer is on target.