Breaking News
Comments
Newest First | Oldest First | Threaded View
KB6NU
User Rank
Freelancer
Re: DB-9, DE-9
KB6NU   1/24/2014 9:35:45 AM
NO RATINGS
Hmmmmm. That makes sense, too. Now that you mention it, I do recall seeing D connectors with those power pins.

MeasurementBlues
User Rank
Blogger
Re: DB-9, DE-9
MeasurementBlues   1/24/2014 8:53:45 AM
NO RATINGS
@KB6NU

The letters actually refer to the connector shell size and are really independing of the number of pins. For example, a DB shell could have fewer than 25 pins. Some have two or even three heavy pins (one for power, 2 for return) and some signal pins. The reason the the 9-pin is designated DE is because it was developed after A, B, C, and D, sizes.

KB6NU
User Rank
Freelancer
Re: DB-9, DE-9
KB6NU   1/24/2014 8:02:12 AM
NO RATINGS
That's amusing. Despite using those connectors for longer than I care to mention I never knew that. It's amusing how the letter and number are redundant, too.

MeasurementBlues
User Rank
Blogger
DB-9, DE-9
MeasurementBlues   1/16/2014 1:59:36 PM
NO RATINGS
Officially called DE-9? (See page 3)

That's what I thought until about a year ago. Everybody thinks DB-9, DB-25, etc. but no.





Flash Poll
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Rishabh N. Mahajani, High School Senior and Future Engineer

Future Engineers: Don’t 'Trip Up' on Your College Road Trip
Rishabh N. Mahajani, High School Senior and Future Engineer
7 comments
A future engineer shares his impressions of a recent tour of top schools and offers advice on making the most of the time-honored tradition of the college road trip.

Max Maxfield

Juggling a Cornucopia of Projects
Max Maxfield
20 comments
I feel like I'm juggling a lot of hobby projects at the moment. The problem is that I can't juggle. Actually, that's not strictly true -- I can juggle ten fine china dinner plates, but ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
41 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Karen Field

July Cartoon Caption Contest: Let's Talk Some Trash
Karen Field
151 comments
Steve Jobs allegedly got his start by dumpster diving with the Computer Club at Homestead High in the early 1970s.

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)