Revision as of 21:20, 10 February 2007

I would like to retro-fit my 1970's pioneer turntable to be able to record onto a iPod or other USB device.

Why?

Because I like to combine technology in unusual ways. And also to bring together analog and digital without a computer getting in the way.

There is a microcomputer involved however.

Indicator light is off
Plug in USB stick or iPod
Indicator light is green to indicate all is well - iPod or memory stick is detected
Place stylus on a chosen track
Press button
Indicator light is red for record
You will also see the activity light on the USB device light
Sound file is written onto the device in WAV/AIFF format
Press button
Recording stops and file is closed
Indicator light is green
You can press the button to begin recording again to a new file
Unplug device (only when light is green - your risk if you unplug on red)
Indicator light goes out

Power supply
Indicator LED and bezel
- plug pack 12V 100mA
- Split from it's case and wired in parallel on the AC side of the turntable's main transformer
Analogue phono stage (requires ±12V DC)
- to be build on veroboard
ICSP programmer required to completely rewrite the bootloader - AVRISP mkII

Implementing USB 1.1 in AVR assember
gcc, libc supplied and open source
No real operating system required
svn tree
bootloader supplied and open source
libipod [tar] program to modify iPod's XML playlist file to add the newly created track to the playlist
ContikiOS

@@ Line 79: / Line 79: @@
 *[http://www.wikihow.com/Convert-a-Computer-ATX-Power-Supply-to-a-Lab-Power-Supply Custom power supply project]
 *[http://www.hynet.umd.edu/research/atemu/downloads.html Good links and downloads] for emulators, libc...
+*[http://blackfin.uclinux.org/gf/project/bf1/wiki/ Blackfin]