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Using aviation connectors instead of db-style connectors Answered

Hello,

I'm working on an arduino build that calls for a db9 connector, but cutting a nice, clean hole in a small, plastic project box for a db9 connector is difficult and messy. I would like to substitute a round connector so I can just drill a hole, and I came across "Aviation connectors." Would these be a decent replacement for db connectors? If so, why aren't they used more often? Is there some disadvantage when carrying a small (3.3v or 5v) DC signal? They are often rated for something like AC 200V 5A, which is total overkill, but would it be a problem?

Here's what I'm looking at on Amazon: Hilitchi 32-Pieces 6 7 8 9 10 Pin 16mm Thread Male Female Panel Metal Aviation Wire Connector Plug Assortment Kit

If this will work as well as the db9, I wouldn't mind buying the whole kit and having some round-hole options for other projects.

Google searches have not been very helpful, and tend to give a lot of results for one or the other type of connector.

Thanks in advance for any guidance!

Discussions

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Downunder35m

5 weeks ago

You can find quite cheap (round) connectors in the usual electronics stores, like Mouser.
Anything from single pin up to 32 pins.
Including bulkhead connectors in male or female.

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Jack A Lopez

5 weeks ago

Regarding this method of printing a 2D paper pattern...then gluing the paper pattern to plastic...then cutting away the plastic, I found some pictures of this for a homemade cover for a mains power outlet.

I realize this shape is much bigger than a DB9 connector, but I am still going to call it evidence for my claim the method works.

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Jack A Lopez

5 weeks ago

I think a pair of matched male+female aviation connector could work.

However, I would not use them. My reasons: I already have DB9 connectors in my junk collection, probably male and female both. They were common on old computers, used for serial port connectors. Also I am willing to cut odd-shaped holes, e.g. rectangular, trapezoidal, whatever. All that is needed for this, is to drill a few circular holes. Then use some small files, to cut away the remaining plastic.

Actually one way to do this, is to print the 2D shape to paper. Then glue the paper to the plastic. Then the lines on the paper serve as a guide for where to cut the plastic away.