INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Jiffy?

Jiffy?

(OP)
I heard on the radio this morning that a jiffy is equal to a power cycle period at 50 or 60 Hz, among other definitions. Completely new to me. Web searches take me to http://www.numericana.com/answer/units.htm#jiffy where it suggests the more modern electrical engineering definition is 10 ms, but with no source given. Before I email Fred Berman, Ph.D., P.E. asking him for his source, I thought I'd ask here. Anyone hear of these definitions, and if so, where?

RE: Jiffy?

(OP)
Wikipedia simply points back to the website I linked. To be clear, I'm not interested in the many definitions, but those specific to electrical engineering. Also not interested in any http://lmgtfy.com/?q=jiffy types of answers. I'm wondering if there are electricals out there who have actually heard or used the word in this manner. Thanks.

RE: Jiffy?

It's familiar as a colloquial term, generally meaning a fairly short period of time. I have never heard it in any formal, technical context over this side of the pond.

I actually thought Europe had a monopoly on weird names for units of measurement and had used most of them while devising the CGS system, but perhaps this is a late challenge from the colony. smile
  

----------------------------------
  
If we learn from our mistakes I'm getting a great education!
 

RE: Jiffy?

good point ! :D  

If there was no electricity there would be no internet. Good point, don´t you? :D

RE: Jiffy?

Never heard the term related one 60 Hz or 50 Hz cycle.  Sounds bogus.  

David Castor
www.cvoes.com

RE: Jiffy?

If "jiffy" works, then where are we with "RCH"?

old field guy

RE: Jiffy?

His 1-cycle suggestion is his opinion.  It's not, as others have said, a definition.

RE: Jiffy?

steveal

Below is a link to a little more scientific site at the University of North Carolina-Chapel Hill which has definitions for units of measure. It gives some insight as to where the unit may have come from.

www.unc.edu/~rowlett/units/dictJ.html
 

RE: Jiffy?

Let's keep it clean ofg winky smile

=====================================
(2B)+(2B)'  ?

RE: Jiffy?

IEEE 100 goes from "jerk" to "jitter" in a jiffy.  
(no jiffy there)

=====================================
(2B)+(2B)'  ?

RE: Jiffy?

10ms?!?  That's incorrect as far as I know.  A jiffy is defined as the time it takes light to transit one foot in a vacuum.  It  happens to be 1.0ns.  This is from an engineering textbook I had in college.

Keith Cress
kcress - http://www.flaminsystems.com

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources

eBook: Model-Based Definition (MBD)
As product development becomes increasingly complex and dynamic, it’s necessary for traditional engineering practices, processes, tools and mindsets to adapt and take advantage of new possibilities. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close