Download - Senior Design Project
Senior Design Project
“ MP3 Player ”Brian P. Allen
Zeeshan A. KhanJerry T. Koshy
Objectives What? – Create a portable MP3 player Why? – To integrate software with
hardware and implement our fundamental engineering knowledge.
MP3 Technology Introduction MPEG Audio Layer 3 File format Compressed Maintains quality Used for Music
Selection Process Criterion Simplicity Economical Versatility Voltage Consistency Familiarity Compatibility Interfacing Ability
Microprocessor “Brain” Functions:
• User Input• Retrieves memory
data• Commands to DSP• Display Information
PIC16F877 key features Small instruction set (35) RISC Several I/O ports Operating voltage range (2.0v to 5.5v) Previous knowledge Low cost
Decoder
Functions:• Serial control • Decompression• Digital signal processing
VS1001k key features Single-chip solution Built-in DAC Built-in amplifier Handles MPEG layer 1, 2 and 3 audio 4kB built-in RAM Can handle variable bit rates
Multimedia Card key features High storage capacities Non-volatile solid state No moving parts Fewer pins than other devices Low power consumption Low cost
Other Parts Power Supply LED’s Switches Crystal SOIC-DIP converter Voltage Regulator 3.5 mm Audio Jack
PIC Resets MMC & decoder SPI Commands Read memory sector Transfers data to decoder User Interface Display Interface
BudgetParts List Component Quantity Price
PIC16F877 Processor 1 $8.00
VS1001k Decoder 1 $25.00
SanDisk Multimedia Card 1 $24.99
Other Parts $30.00Total $82.99
SchedulePhases:
1. Research & Component Selection
2. Preliminary Design & Ordering of Parts
3. Construction & Testing
Feb Mar Apr May Jun July Sep Oct Nov Dec
Phase 1Phase 2
Phase 3
Progress Completed: research, component
selection and purchase, and preliminary design.
Currently: programming microprocessor and constructing circuit.