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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 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?

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 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

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?


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.

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 -

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