HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Comments
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 2/4  >  >>
Larry M
User Rank
Platinum
Re: Painful excersize
Larry M   6/13/2013 8:58:42 AM
NO RATINGS
g-whiz wrote: " I was electrically isolated, in intimate contact with a hard rubber belt, moving and rubbing against another surface."

The other name for this particular apparatus is "Van de Graff generator." They can generate up to 5 million volts. See the Wikipedia article for more details.

 

 

Rob Spiegel
User Rank
Blogger
Re: One static charge after another
Rob Spiegel   6/11/2013 9:46:31 PM
NO RATINGS
Thanks TJ. I look forward to seeing them.

econobiker
User Rank
Iron
Re: One static charge after another
econobiker   6/10/2013 2:16:35 PM
NO RATINGS
nichollr wrote:

"I've noticed at our local Walmart that as I push some of the carts, I get a static discharge through my hands.  It's really uncomfortable.  Have other's noticed this same problem?"

Often you will see some versions of  shopping carts with a discharge strap or small chain hanging down rubbing the ground.  This also seems to be a greater problem with the newer plastic carts than the older metal carts... There has been alot of info about this problem with a specific retailer which you can find by searching: Wal-mart shopping cart static electricity shock.

John E
User Rank
Silver
Re: One static charge after another
John E   6/7/2013 6:25:48 PM
NO RATINGS
I once worked for a contract ICT test house developing test programs and fixtures.  Our test head (HP3065) and debug bench was in a "static controled" room with a disapative carpet.  One day durring the winter, I walked accros that rug, reached down into the empty patch bay of the test head and drew a 1" arc to one of the test card connections; it hurt like heck and I jumped back.  I immediatley grabed the diagnostics fixture, and found that we had a dead analog card.  It took two day of down time for HP to find the problem and get us a replacement card.  So much for the anti static carpet.  We got a lot more serious about wrist staps after we learned that we could not rely on the carpet any more.

Rob Spiegel
User Rank
Blogger
Re: One static charge after another
Rob Spiegel   6/7/2013 5:56:12 PM
NO RATINGS
Hey, 3Drob,

I'd like to use this story as a Made by Monkeys blog. 

You can send it along to rob.spiegel@ubm.com

Thanks.

Rob Spiegel
User Rank
Blogger
Re: Painful excersize
Rob Spiegel   6/7/2013 5:52:59 PM
NO RATINGS
Hey, g-wiz, this would make a good Sherlock Ohms posting. Could you send it along with a bit more detail -- to fill out the length -- and include a short two- to four-sentence bio?

You can send it to rob.spiegel@ubm.com

dbues
User Rank
Gold
Re: I guess not every company focuses on ESD
dbues   6/7/2013 6:45:16 AM
NO RATINGS
JimT, thanks for the feedback!!!  Comes from having an English teacher for a Mom....

dbues
User Rank
Gold
Re: One static charge after another
dbues   6/7/2013 6:43:58 AM
NO RATINGS
3drob, I know what you mean.  We had a guy years back that used to flick his cigarette ashes into our chassis.  Drove QA nuts!!!  He's the same guy that designed everything with discrete J-K flip flops.

 

Everybody assumed he was a genius because all his designs worked, but nobody understood them.  Luckily for me, he left before I had to debug anything he designed.

dbues
User Rank
Gold
Re: ESD discharge
dbues   6/7/2013 6:40:30 AM
NO RATINGS
Thanks for the tip, Frank.  I'm trying it now.

Ralphy Boy
User Rank
Platinum
Re: One static charge after another
Ralphy Boy   6/6/2013 10:55:01 PM
NO RATINGS
Yeah 3drob... We get that too sometimes. I've been told by one EE that he's never zapped a board... 'Yet' is what I replied.

We have below 1% humidity in the dryrooms and an over active air exchange in one of those creates a bit of a breeze too. We do a good job of maintaining boot straps, wrist straps, ESD Lab coats as SOP in those... and we still get the occasional fire, so far though those always seem to be non-static events. Friction; go figure.

<<  <  Page 2/4  >  >>


Partner Zone
Latest Analysis
The engineers and inventors of the post WWII period turned their attention to advancements in electronics, communication, and entertainment. Breakthrough inventions range from LEGOs and computer gaming to the integrated circuit and Ethernet -- a range of advancements that have little in common except they changed our lives.
The age of touch could soon come to an end. From smartphones and smartwatches, to home devices, to in-car infotainment systems, touch is no longer the primary user interface. Technology market leaders are driving a migration from touch to voice as a user interface.
Soft starter technology has become a way to mitigate startup stressors by moderating a motor’s voltage supply during the machine start-up phase, slowly ramping it up and effectively adjusting the machine’s load behavior to protect mechanical components.
A new report from the National Institute of Standards and Technology (NIST) makes a start on developing control schemes, process measurements, and modeling and simulation methods for powder bed fusion additive manufacturing.
If you’re developing a product with lots of sensors and no access to the power grid, then you’ll want to take note of a Design News Continuing Education Center class, “Designing Low Power Systems Using Battery and Energy Harvesting Energy Sources."
More:Blogs|News
Design News Webinar Series
3/31/2015 11:00 a.m. California / 2:00 p.m. New York
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
5/7/2015 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.
May 4 - 8, Designing Low Power Systems using Battery and Energy Harvesting Energy Sources
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7


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.
Last Archived Class
Sponsored by Proto Labs
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service