10 Jun
2013
10 Jun
'13
5:10 p.m.
Hi Guy,
This has been discussed at length among us DEC folks
here in the SF Bay area.
And with which conclusion?
One idea that's kind of neat
(I think it was Eric Smith who first mentioned it) was use insert a PLL between the
optical sensor circuit and the
controller that would allow you to specify the number of sector pulses that gets sent to
the controller.
I once thought about that, too. Don't remember if I was inspired
by some posting
somewhere. It would be quite easy. A $2 AVR with a crystal oscillator would to
the job as well. Then you would only need a switch for the number of sectors.
One prerequesite for this "virtual sectoring" would be a good stability of the
disk rotation speed.
With a microcontroller you could also resynchronize the software PLL with the
original index slots. That would make the thing even more accurate!
So, new question: Would there be any interest in a little circuit that can be
added to any RK05 drive?
As an aside, I'm in about the same boat. I have 4
16-sector packs and 200-300 12 sector packs.
Hundreds and only four? I have about 15
16-sector packs. And less 12 sector
packs. But as I wrote - there's 12-sector pack supply...
Kind regards
Philipp