HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
View Comments: Newest First|Oldest First|Threaded View
Page 1/4  >  >>
Rob Spiegel
User Rank
Blogger
Re: Electric Fence
Rob Spiegel   6/5/2012 4:02:10 PM
NO RATINGS
Yes, it is more powerful that I would have guessed. 

tekochip
User Rank
Platinum
Re: Electric Fence
tekochip   6/5/2012 3:46:37 PM
NO RATINGS
These were NiMh cells, and you can just about weld with them.  A good cell can deliver as much as 30A and only drop down to 1V.  You wouldn't be able to do that on regular use before the cell is destroyed, but they can really deliver current.

Rob Spiegel
User Rank
Blogger
Re: Electric Fence
Rob Spiegel   6/5/2012 2:34:40 PM
NO RATINGS
That's funny Tekochip. It's also surprising that AAs would have that much juice. AAs seem so benign; it's hard to believe they could pack such a punch.

tekochip
User Rank
Platinum
Electric Fence
tekochip   6/4/2012 10:41:37 PM
NO RATINGS
I dumped some AAs into my left hand once and was instantly burned as my wedding band made contact across the positive terminal and a nick in the insulator on the battery body. The gold in the wedding band is an excellent conductor of heat and electricity, and I was burned all the way around the ring in a matter of seconds. My wife thought that would be a great invention to cure a wandering eye, sort of like an invisible fence.


lgrant
User Rank
Bronze
Battery Sparks Red-Hot Mystery
lgrant   6/4/2012 9:10:34 PM
NO RATINGS
When I was a kid, my dad tried this trick, but with a battery, a pocket full of change, and a flashbulb.  I have never seen anyone take their pants off so fast before or since. 

 

 

Nancy Golden
User Rank
Platinum
Re: AA tongue torture
Nancy Golden   3/7/2012 5:16:30 PM
NO RATINGS
Yup, you and my husband. I bet if you see a foreign substance you stick your finger out and touch it and then sniff it to try to determine what it is. In some ways I will never understand the male gender! I'll never forget the time we went on a rock hunt out on a ranch and when we brought our treasures back to the grizzled old guy that ran the place - he would hold up each of our rocks to examine it, and on some of them he would lick it as part of his examination, Yeccch.....but the guy sure knew his rocks. He could tell you everything there was to know about each one.

Rob Spiegel
User Rank
Blogger
Re: AA tongue torture
Rob Spiegel   3/7/2012 3:38:47 PM
NO RATINGS

Yes, so do I, Deejayh. Once you've done it a few hundred times, you can tell if the battery is weak, medium strength or brand news. When I was a kid my parents thought I was nuts for doing it. Later on, my kids thought I was nuts for doing it. 

 

deejayh
User Rank
Silver
Re: AA tongue torture
deejayh   3/7/2012 3:34:57 PM
NO RATINGS
Yep, it's just a small demonstration using the AA battery.  But, being a Man, I still use the tongue method to check my 9 volt batteries.

Rob Spiegel
User Rank
Blogger
Re: AA tongue torture
Rob Spiegel   3/7/2012 3:02:53 PM
NO RATINGS
I couldn't resist trying this Deejayh. Got a very small tingle. Pretty good. 

deejayh
User Rank
Silver
AA tongue torture
deejayh   3/7/2012 10:02:43 AM
NO RATINGS
A double A battery will give your tongue a small tingle when new.  No, my tongue isn't 4" wide/long.  Apply your index finger to the negative terminal (flat end) of the battery and touch the other end (+) to your tongue.  A bit of moisture on the end of your index finger will increase the effect.  So, if your a bit too squeamish to try a 9V, give this smaller dose a try.

Our company requires us to tape the terminal ends of all batteries before placing them in the battery recycling bucket.

Page 1/4  >  >>


Partner Zone
Latest Analysis
Advertised as the "Most Powerful Tablet Under $100," the Kindle Fire HD 6 was too tempting for the team at iFixit to pass up. Join us to find out if inexpensive means cheap, irreparable, or just down right economical. It's teardown time!
The first photos made with a 3D-printed telescope are here and they're not as fuzzy as you might expect. A team from the University of Sheffield beat NASA to the goal. The photos of the Moon were made with a reflecting telescope that cost the research team 100 to make (about $161 US).
At Medical Design & Manufacturing Midwest, Joe Wascow told Design News how Optimal Design prototyped a machine that captures the wing-beat of a duck.
The increased adoption of wireless technology for mission-critical applications has revved up the global market for dynamic electronic general purpose (GP) test equipment. As the link between cloud networks and devices -- smartphones, tablets, and notebooks -- results in more complex devices under test, the demand for radio frequency test equipment is starting to intensify.
Much of the research on lithium-ion batteries is focused on how to make the batteries charge more quickly and last longer than they currently do, work that would significantly improve the experience of mobile device users, as well EV and hybrid car drivers. Researchers in Singapore have come up with what seems like the best solution so far -- a battery that can recharge itself in mere minutes and has a potential lifespan of 20 years.
More:Blogs|News
Design News Webinar Series
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 20 - 24, How to Design & Build an Embedded Web Server: An Embedded TCP/IP Tutorial
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: 10/28-10/30 11:00 AM
Sponsored by Stratasys
Next Class: 10/28-10/30 2:00 PM
Sponsored by Gates Corporation
Next Class: 11/11-11/13 2:00 PM
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service