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用ATmega8制作的MP3播放器            【字体：小 大】
用ATmega8制作的MP3播放器
作者：未知    文章来源：本站原创    点击数：    更新时间：2006-3-6
Production of The MP3player.



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


Prototype




                  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

　

　

    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

　

　　

　

   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

　

　　

   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

  
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