DIY USB sound card with PCM2702 (quite same as PCM2902)
http://www.myexposition.com/diy/usbdac/overview.html
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http://www.scienceprog.com/drive-dot-...-display-using-lpt-port-and-driver-ic
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http://www.von-info.ch/hb9afo/max2750_tx.htm
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http://www.piclist.com/techref/io/stepper/linistep/index.htm
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http://search.ebay.com/3W-rgb-led_W0QQfromZR8QQfrtsZ50QQfsooZ1QQfsopZ1
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http://search.ebay.com/_W0QQfrtsZ100QQfsooZ1QQfsopZ1QQsassZdpi4parts
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http://www.serasidis.gr/circuits/smscontroller/smscontroller.htm