Mid-Semester Presentation Music Alarm Clock

Team Members Will Kalish Electrical Engineering Removable Media Device Audio Decoder Eric Womack Electrical Engineering MCU Setup User Interface Craig Bilberry Team Leader Electrical Engineering Layout and Design Atomic Clock Signal Erik LaVine Electrical Engineering Layout and Design Audio Decoder

Overview Introduction Introduction  Problem  Solution Constraints Constraints  Technical  Practical Changes/Refinements Changes/Refinements Test Plan Test Plan PCB PCB Packaging Packaging References References Questions Questions

Problem Limited customizable options for people without digital media players  Beeping  Buzzing  Radio Conventional clocks develop inaccuracies over long periods of time

Solution A device that combines the functionality of an atomic clock, an alarm clock, and a portable media docking station without the need for a portable media player.

Constraints

Technical Constraints Name Description Audio QualityMusic must be played at a sample rate of 44.1 kHz Audio Compatibility The Music Alarm Clock must be able to play audio files that are widely used in order to be compatible with users existing audio libraries. Storage CapacityThe storage device must be able to store 30 minutes worth of audio files. Time Accuracy The clock must be able to keep time accurately using the atomic signal. Display Characteristics The display must be readable in all lighting conditions from across the room.

Practical Constraints Sustainability - Durability Sustainability - Durability  The Music Alarm Clock must be able to withstand mistreatment by the user. Social - Compatibility Social - Compatibility  The removable storage device must be compatible with current operating systems and hardware in PCs.

Design I Goals Technical Constraint Constraint Met Audio Quality YES Audio Compatibility YES Storage Capacity YES Time Accuracy YES Display Characteristics YES

System Diagram Micro- Controller Audio Decoder Media Drive Atomic Signal Receiver Display

Changes/Refinement from Design I Changed from two 28 pin PIC24 to a single 64 pin PIC24 Added a backup battery subsystem Added an amplifier subsystem

New PIC24 Changed from two 28 Pin PIC24s to a single 64 Pin PIC24.

Progress – USB/MP3 Integrated with 64-pin PIC24

Test Plan Subsystems  Atomic Receiver  Receiving and decoding accurate signal  Maintain to keep time accurate  USB/MP3  Read mp3 file  Decode mp3 data  Backup Battery System  Simulate  Remove main power Overall System Test

Atomic Receiver Test

USB/MP3 Test

Backup Battery Schematic

Backup Battery Simulation

Main PCB Layout

Display PCB Layout

Packaging Top Back Side Front

Questions?