I think the real problem is putting controlled amounts
of current through the wires. Because we probably
don't have specs for any of these, the amount of
current and time the current is on will have to be
determined by experimentation. Then, keep in mind that
the array is big so you have to make a lot of
identical circuits for an array of any size. Then, you
have to find the center of the "sweet spot" where at a
certain temperature, cycle speed, write current, cycle
speed, all of the cores work. I think this used to be
called a "schmoo" chart?
--- Dave McGuire <mcguire_at_neurotica.com> wrote:
> On December 16, ajp166 wrote:
> > The older large ferrite core is easier to work
> with though
> > much slower. The bigger cores produce a larger
> output
> > when they switch but the cycle times are in the
> > 3-5uS range. The later is helpful for demos as
> nothing
> > is too fast.
>
> I wonder if it would be possible (and practical)
> to use a
> microcontroller, perhaps a PIC, to act as a core
> controller. Use the
> A/D and D/A hardware to handle the drive and sense
> stuff, and do all
> the timing in firmware...making it easily tweakable.
>
> That would be something I'd be up for trying...if
> I can find a chunk
> of core of low enough density to trace the wiring
> in. There are some
> nice low-density planes on eBay right now, but they
> are priced WAY too
> high in my opinion.
>
> -Dave
>
> --
> Dave McGuire
> St. Petersburg, FL "Less talk. More
> synthohol." --Lt. Worf
__________________________________________________
Do You Yahoo!?
Check out Yahoo! Shopping and Yahoo! Auctions for all of
your unique holiday gifts! Buy at
http://shopping.yahoo.com
or bid at
http://auctions.yahoo.com
Received on Sun Dec 16 2001 - 11:02:00 GMT