Hi,
I would like to fully control a CD or DVD so I can record data while having full control of the motor and laser. To be more precise I want to be able to encode the 0s and 1s so that their burned "length" on the disk is fully controllable.
Has anybody done that? Any guidelines or reference projects or references would be much appreciated.
Are there any CD/DVD units that are easier to reverse engineer and control for such applications?
I guess the first thoughts that come to mind are:
1) what motors they use (steppers or other)?
2) I assume they use some feedback mechanism to know at which angle at any given point the disk is and that the current speed is constant?
3) how to modulate the laser (maybe this it just an easy on/off)?
Thank you