Displaying core states

From: Chuck McManis <cmcmanis_at_mcmanis.com>
Date: Thu Apr 22 14:08:12 1999

At 01:35 PM 4/22/99 -0500, John Foust wrote:
> There's also the $9-$20 "Magnadoodle" technology ...
> I thought you had kids. :-)

Doh! That's a good thought. (And yes I have kids and yes we've gone through
our share of these :-))

Now since Allison has reminded me of what I tried so hard not to learn in
EE370 (ElectroM{agnetics/echanics} about the state of flux in a torroid it
seems that we will probably have to settle for capturing the "flip" as
opposed to reading the state directly. This would require clearing the
indicator and the core to a known state, then the capturing the
transitions. These transisitions, if I understand this correctly, would
exist as the momentary existence of a magnetic field around the torroid.

I don't know if anyone on this list has seen The Secret Life of Machines
(yeah right) but this is the kind of project Tim Hunkin really gets a kick
out of. And I've got to try to do this with nuts from a hardware store
since is the right way to do it. (I'm still in awe at how they recorded
sound on a scotch tape with rust sprinkled on it!)

--Chuck
Received on Thu Apr 22 1999 - 14:08:12 BST