Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
Page 1 / 4   >   >>
Max The Magnificent
User Rank
Blogger
re: A package just arrived on my desk…
Max The Magnificent   9/27/2012 1:25:45 PM
NO RATINGS
WOW -- this is WONDERFUL -- I expect to spend a LOT of time roaming around your website -- thanks for sharing

Navelpluis
User Rank
CEO
re: A package just arrived on my desk…
Navelpluis   9/27/2012 8:23:36 AM
NO RATINGS
We run the www.cryptomuseum.com website. On our (physical) collection we have German and Russian wire recorders, the small ones. Really beatiful marvels of engineering from the past. It might be a good idea to klick this link for the Protona wire recorder from Austria. This recorder was very widely used by all secret services, including the CIA. It had a secret microphone build inside a watch. The watch has no mechanics and is not running. The story goes that an agent was caught on an airport since he wore 2 watches: The one that worked and the one with the microphone. Anyway, enjoy this link: http://www.cryptomuseum.com/covert/minifon/mi51/index.htm

Douglas442
User Rank
Rookie
re: A package just arrived on my desk…
Douglas442   9/21/2012 8:22:21 PM
NO RATINGS
Well, I personally loved Pratchett's idea for his Discword computer, "Hex". So an online search to see if I could find more details turned up this image, which appeared, briefly, in the "Hogfather" DVD. Apparently, there's also a guy online, who sells all sorts of Discworld paraphernalia, and provides these as stickers, etc. After all, who knows... "ant colony optimization algorithms" and all that. Anyway, for wire storage of audio frequencies I suppose I'd expect the physical extent of the magnetic domains to be rather small, sub-millimeter, even at two feet per second. And so accordingly, the field strengths as well. But for useful non-electronic storage of binary data, as an alternative to punch-cards or paper-tape, it may not need to be so limited. Especially for several spools geared to run in parallel. Then, if this type of wire is of an alloy *particularly* suitable for magnetization, then reading back your data might be accomplished with a set of compass needles ( mechanically interfaced through sensitive torque-amplifies ). Or electrically interfaced through the contacts elements of reed-relays. And, perhaps, mechanically writing data might be accomplished with a device having a set of small hammers with magnetized heads. A perfect project for folks who have the right tools and too much time on their hands!

Max The Magnificent
User Rank
Blogger
re: A package just arrived on my desk…
Max The Magnificent   9/21/2012 1:31:47 PM
NO RATINGS
Hi Douglas -- I love your new "AntHill Inside" icon/image -- did you create that yourself? No idea of the strength of the magnetic field on the wire -- it cannot be too high I wouldn't have thought

Max The Magnificent
User Rank
Blogger
re: A package just arrived on my desk…
Max The Magnificent   9/21/2012 1:30:11 PM
NO RATINGS
You should copy the contents of those tapes onto CD before they fade away -- there are services that will do this for you if you are too busy

Douglas442
User Rank
Rookie
re: A package just arrived on my desk…
Douglas442   9/21/2012 9:25:19 AM
NO RATINGS
Out of curiosity, any idea of the typical range of strength of magnetic fields stored on the recording wire? Sufficient enough to deflect a compass needle? Activate a sensitive reed relay? ... and aren't certain types of insects sensitive to magnetic fields?

Duane Benson
User Rank
Blogger
re: A package just arrived on my desk…
Duane Benson   9/21/2012 5:55:07 AM
NO RATINGS
My dad used wire recorders back in his military days. I've never personally seen one and your photo of the wore spool is the first I've seen of that. I do have some old reel to reel tapes that have voices of my parents when they were quite young and may have my grand parents on them. I found an old tube reel to reel player but haven't gotten around to getting it up and running yet. I suppose I should soon or the tapes may disintegrate.

Max The Magnificent
User Rank
Blogger
re: A package just arrived on my desk…
Max The Magnificent   9/20/2012 3:05:03 PM
NO RATINGS
Wow -- I'd never even thought of using them for CNC machines -- but it makes sense -- about 15 years ago I went to a PCB manufacturing facility here in town to get a few boards made and they still used paper tape to control their CNC machines (like the drills and suchlike)

Max The Magnificent
User Rank
Blogger
re: A package just arrived on my desk…
Max The Magnificent   9/20/2012 3:02:57 PM
NO RATINGS
LOL

Rcurl
User Rank
Rookie
re: A package just arrived on my desk…
Rcurl   9/20/2012 2:28:38 PM
NO RATINGS
I was thinking along the same lines...at least the part about scanning piano rolls. I did a quick search and found that it is already being done: http://www.trachtman.org/rollscans/ -Rick

Page 1 / 4   >   >>


Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Vetinari Clock: Additional Possibilities
Max Maxfield
22 comments
In my previous blog on the topic of my Vetinari Clock project, we pondered a number of possibilities for the positioning of switches on the front panel, and we ended up with a number of ...

Jolt Judges and Andrew Binstock

Jolt Awards: The Best Books
Jolt Judges and Andrew Binstock
1 Comment
As we do every year, Dr. Dobb's recognizes the best books of the last 12 months via the Jolt Awards -- our cycle of product awards given out every two months in each of six categories. No ...

Engineering Investigations

Air Conditioner Falls From Window, Still Works
Engineering Investigations
2 comments
It's autumn in New England. The leaves are turning to red, orange, and gold, my roses are in their second bloom, and it's time to remove the air conditioner from the window. On September ...

David Blaza

The Other Tesla
David Blaza
5 comments
I find myself going to Kickstarter and Indiegogo on a regular basis these days because they have become real innovation marketplaces. As far as I'm concerned, this is where a lot of cool ...