PDR Digital Audio RecorderPlayer Brian Cowdrey Mike Ingoldby

PDR- Digital Audio Recorder/Player Brian Cowdrey Mike Ingoldby Gaurav Raje Jeff Swetnam

Objective Successfully encode/decode MP 3 Play/Stop a song Select track and fast forward/rewind Read off from Compact Flash Card Display song title and time Voice Recording in MP 3 Format Equalizer Controls

Hardware Overview ROM RAM MP 3 Enc/Dec DAC MCU Compact Flash D/E Buttons LCD LEDs ADC

Software Overview Bios DSP OS Recording User Int. Supply data to Dec/Enc LCD Buttons Supply CF to Memory

Microprocessor (C 8051 F 320)

MP 3 Encoder/Decoder (MAS 3587 F)

Project Schedule

Milestones CDR Research/Design components l PCB design layout l Order First PCB l Milestone I Test Microprocessor l Implement Monitor Program l LCD/User Interface l

Milestones (contd. ) Milestone II Program Encoder/Decoder l Program OS to Combine all programs l Redesign original PCB design l Expo Possible extensions l Final testing/debugging l

LCD Display/User Interface Monochromatic graphical display 122 x 32 pixels 8 -bit interface with built in controller Display song title and play time (possibly ID 3 tag) Show menu corresponding to user interface buttons

Division of Labor Jeff Mike § MP 3 encoder/decoder § Microprocessor § Signal processing § USB interface Brian Gaurav § LCD § Compact flash § User interface § FAT 16 file system

Risks/Contingency Plan Risk: Errors on PCB layout Solution: Reorder new PCB board Risk: MP 3 Encoding/Decoding Errors Solution: Record and play back raw data as wav files Risk: Problems with USB interface Solution: Switch to a serial port Risk: Graphical LCD errors Solution: Switch to character LCD

Compact Flash Card Small removable mass storage device Connected to microprocessor with a 8 bit data bus Microprocessor interfaces w/ CF card with registers on CF card

FAT 16 Directory structure that lists files and locations on CF card Compatible on many platforms (Windows, Linux, Mac OS) User friendly

Possible Additions FM remote control Equalizer Battery Power Real-time signal processing

Marketability Target Market: Teenagers/College Students Directly compete with Apple’s IPOD l Additional recording capabilities

Impact on Society May increase illegal music downloads Drive down prices for other MP 3 players in the market

Cost Analysis PCB (2) $300 Microprocessor $40 MP 3 Encoder/Decoder $35 LCD Display $30 Compact Flash Card $20 RAM $5 Miscellaneous Parts $20 ------------------------------------TOTAL APPROX. COST $450

Expected Yield Selling Price Per Unit = $50 Mass Produced PCB Microprocessor MP 3 encoder/decoder Misc. parts Labor LCD Total = $20 Profit=$30 per unit 150% yield $8 $1 $1 $2 $5 $3

Any Questions?