1. ECE ILLINOIS Ricardo Carrera, Anthony DiMonte
Group 8, Underwater Swim Pacer
ECE 445 Senior Design
November 11, 2014
ECE Main Slide

2. Project Overview
Project is sponsored by Professor Howard Schein of the Illini Swim Team.
Accurately displays a user inputted swim pace via a series of LED modules.
Has three modes of operations.
Exports swimmer’s data via USB to external device.
Lane line
Input Buttons
Record Button
7seg Display
Lamp Mounts
Lamps

3. Time Algorithm Calculations
Each module will be active for a time (∆t) as the lights advance down the length of the pool
The program must find ∆t depending on the user’s input
Using 15 LED modules, the formula becomes: ∆t = T/(L*28)
∆t = individual active time per pool length
T = total user inputted swim time in seconds
L = total user inputted laps
Power Calculations
Each LED module will drawing 252mA at 12V ~ 3.02W
With 15 modules in our project, the total power consumption of the LEDs will be ~45W
The power supply chosen for this project is rated for 60W at 12V.
This allows for a 25% safety margin which will suffice to power the rest of the ICs.

4. LED Module
this LED module is battery operated for underwater brightness and waterproof testing purposes.
The final module design will be powered and controlled through a waterproof cable.

5. USB Communication Module
Block Diagram
USB Communication Module

6. Conclusion
Programming the microcontroller proved to be more challenging than expected.
We have adjusted our schedule to still complete a three person project with only two members while trying to maintain the original complexity our project.
We have made great progress but there is still much more to be done for our project to be fully functional.