10 Jun
2013
10 Jun
'13
11:31 p.m.
I'm interested in the "little circuit that can be added to any RK05 drive"
proposal, Philipp :->.
On Mon, Jun 10, 2013 at 8:10 PM, Philipp Hachtmann <hachti at hachti.de> wrote:
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