Breaking News
Comments
Newest First | Oldest First | Threaded View
SPLatMan
User Rank
Manager
Memories....
SPLatMan   9/20/2013 7:35:23 PM
NO RATINGS
Reminds me of one of my first major designs as a young 'un, a vehicle loop detector that was used in Western Australia for 15 years. The best compnent I had to work with was an LM308, which had sufficiently low input bias current to let me make a differentiator with a time constant of 10 seconds or so. The differentiator was to pick out small changes (0.3%) in the loop impedance with very low rates of change (i.e. slow moving cars).

Our competition (Eagle Signals) used a resonant loop (like TI's chip) in an AGC'd oscillator circuit, and a partially charged NiCd cell for the long time constant. I avoided resonant/oscillator schemes because of fierce interaction between adjacent loops, and opted instead for a forced loop drive with the same master oscillator driving them all.

 

It would be fun to make a loop detector with this new chip. Interesting it's not mentioned as a possible application. Maybe it's not got enough input protection? A lighning strike near a detector loop can ruin your day!

Sanjib.A
User Rank
CEO
Re: New twist
Sanjib.A   9/16/2013 1:23:56 PM
NO RATINGS
Pretty cool stuff!! TI is getting stronger in the analog domain with this kind of cool innovative products. I think there could be many promising ideas of using this device. The simplest one that occurs to me (which I would like to try) is making a cheapest, smallest metal detector gadget for fun. :)

 

rick merritt
User Rank
Blogger
New twist
rick merritt   9/16/2013 12:48:54 PM
NO RATINGS
Interested to see what people will do with this.



Flash Poll
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Engineer's Bookshelf
Caleb Kraft

The Martian: A Delightful Exploration of Math, Mars & Feces
Caleb Kraft
6 comments
To say that Andy Weir's The Martian is an exploration of math, Mars, and feces is a slight simplification. I doubt that the author would have any complaints, though.

The Engineering Life - Around the Web
Caleb Kraft

Surprise TOQ Teardown at EELive!
Caleb Kraft
Post a comment
This year, for EELive! I had a little surprise that I was quite eager to share. Qualcomm had given us a TOQ smart watch in order to award someone a prize. We were given complete freedom to ...

Design Contests & Competitions
Caleb Kraft

Join The Balancing Act With April's Caption Contest
Caleb Kraft
57 comments
Sometimes it can feel like you're really performing in the big tent when presenting your hardware. This month's caption contest exemplifies this wonderfully.

Engineering Investigations
Caleb Kraft

Frankenstein's Fix: The Winners Announced!
Caleb Kraft
8 comments
The Frankenstein's Fix contest for the Tektronix Scope has finally officially come to an end. We had an incredibly amusing live chat earlier today to announce the winners. However, we ...

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)