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Production of The MP3player.

I made The MP3player from Atmega8(AVR),VS1001K,SDcard.

Prototype

MP3_NEW.JPG

                  Song: 'Hitomitojite' by ZARD

 Specifications

   CPU: ATMEL ATmega8 8MHz (the internal organs OSC)

   Decoder:VS1001K(DAC/DSP)

   Supports format:MPEG 1&2 for layer 3 and layer 3's 2.5 extensions

                      all sample rates and bit rates(at most 256kbps verification)

                      Supports VBR(variable bit-rate)

  Memory medium: SD (MMC) Card (checked 64MB and 128MB), SPI MODE , FAT16 Onry (Supports VFAT)

  LCD: SC1602BC (16x2) ,Title & artist (ID3TagV1 indicating), play time, volume ,power supply voltage.

  Operation button: Power on& playback,stop & power off,fast forward,review,volume up&down

  Electric power consumption: Approximately 45mA at 3.3V

    Program source  schematic(Sorry,Tr is not BRC133  but BCR133. The capacitor connecting to Atmega8_pin21 is 0.1uF.)

Practical machine 1

@MP3_NEW2MAE.JPG

@MP3_NEW2URA.JPG

    From prototype modification point

     Power source   AA dry cell ,DC-DC converter (Texas:TPS60200)

      When performing adding the pause

     supplied the case (110x70x32mm)

@@Electric power consumption approximately 180mW (with alkaline electric battery approximately 15 hour continuous duty yeses)

@@Program source   schematic(Sorry,Tr is not BRC133  but BCR133. The capacitor connecting to Atmega8_pin21 is 0.1uF. )

Practical machine 2

@MP3_00.JPG

@MP3_NEW3URA.JPG@

@MP3_NEW3MAE.JPG

   Modification point from of practical machine 1

    DC-DC converter modification to MAX778L

     Playback mode one time, all song repeat,one song repeat.

     Noise decrease measure

     Case:Takachi  SW-120B(60x120x24 mm)

     Electric power consumption approximately 170mW

       Source  schematic 1, 2   Hex file (Sorry,Tr is not BRC133 but BCR133. The capacitor connecting to Atmega8_pin21 is 0.1uF. )

   Practical machine 3

@MP3_51.JPG

@@MP3_52.JPG

   From practical machine 2 modification point

    To abbreviate LCD, furthermore the operation indication with compact conversion and LED.

     Case:Takachi SW-95B(95x58x18 mm),Weight:about 90g

     CPU operating speed 4MHz (MAX bit rates 160kbps)

     VS1001k operating speed 12.288MHz (Decoder manufacturer recommendation)

     AAA  Dry cell

@  Electric power consumption approximately 160mW

@Source  schematic  Hex file(Sorry,Tr is not BRC133  but BCR133.)

   Practical machine 4

  

 From a former machine change part

 Decoder:VS1011

  It is adapted for a subdirectory(one class).

  Playback is sorted by the music name(2 bytes of a head).

  Playback mode one time, subdirectory repeat,one song repeat.

  Case is  Snorlax(from pokemon). 

  Source  schematic  Hex file