Mobile MP3 Player PC

  
The CPU is an AMD K5 running 75 MHz. Theres 16 meg ram, and the operating system is Linux (Red Hat 5.2). MPG123 handles the MP3 decoding, and I wrote a control program in Perl. I built the remote control in an old Blaupunkt CD-changer remote case which I emptied completely. It now has a backlit 40x2 LCD and a PIC 16F84 microcontroller. It communicates serially at 2400 baud and also turns the players power supply on and off. It has a few inputs and can sense if the car stereo is on.
Mobile MP3 Player PC - schematic

This player has survived winter in central Oregon and summer in Phoenix. Before I built the remote Id have to manually turn the power off, and sometimes Id forget. I could still start the car after running 15 hours on the battery, and it a



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