ST-506 hard drive emulation

[Gordon JC Pearce]

Tony Duell wrote:
>>Can you get at any rotating part of the motor?
>>Simple enough to graft on your own hall-effect sensor...
> 
> 
> YEs, and kludge on magnets to give the right number of pulses per 
> revolution with the right timing....

Timing and pulse count needn't be that important.  You'd feed the output 
from "your" sensor into a PLL to derive the correct output frequency.

Of course at this stage, it's probably easier to build new hard drive 
mechanicals from scratch.  Seriously.  Look at how cheap and attainable 
CNC lathes are these days.

Gordon.