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

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

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.

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.

USB Communication Module Block Diagram USB Communication Module

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.