Need chart of actual size to determine barrel connector size.

Does such a thing exist, or am I forced to buy one of each size
connector? Its a bitch getting the right size particularly when buying
online.

On 2021-08-18, Rick <rick@nomail.com> wrote:
> Need chart of actual size to determine barrel connector size.
>
> Does such a thing exist, or am I forced to buy one of each size
> connector? Its a bitch getting the right size particularly when buying
> online.

you could look at the data sheets instead of buying.

--
Jasen.

On 8/18/2021 12:16 AM, Jasen Betts wrote:
> On 2021-08-18, Rick <rick@nomail.com> wrote:
>> Need chart of actual size to determine barrel connector size.
>>
>> Does such a thing exist, or am I forced to buy one of each size
>> connector? Its a bitch getting the right size particularly when buying
>> online.
>
> you could look at the data sheets instead of buying.

The problem with barrel connectors is usually one of not knowing
what you have in front of you (either the connector to be replaced
*or* it's missing mate)

"One of each" is the easiest way to handle this. There are
many "universal" wall warts that come with a set of swappable
connectors/plugs; this is an expedient for acquiring an
assortment *and* having a usable power supply mated to same.
Just "collecting connectors" has no *added* value!

Note, in addition to inner and outer diameters (neglecting
connectors with a *third*, center "pin"), you also need to
be wary of the length of the barrel as some devices may
recess the OTS connector too far inside the enclosure and need
a mate with "longer reach".

A micrometer or dial caliper can be used to check the OD of
a cable-end connector; a drill index provides a handy reference
for sizing the inner diameter.

In practice, you will likely find a few connector sizes cover
most of your needs.

On Tue, 17 Aug 2021 22:45:12 -0500, Rick <rick@nomail.com> wrote:

>Need chart of actual size to determine barrel connector size.
>
>Does such a thing exist, or am I forced to buy one of each size
>connector? Its a bitch getting the right size particularly when buying
>online.
>

If you're trying to match something unknown just measure the mating
part and check the connector datasheet. You have tools?

To measure the hole you can use a set of gauge pins (or a drill set if
you don't have gauge pins), or do it (badly) with the pointy end of a
set of calipers.

Measure the outside with calipers or a micrometer.

For example I have a 2.1mm hole in the female and the barrel OD
measures 5.46mm with calipers or about 5.456mm with a micrometer.;;

This is called a 2 x 5.5mm or 2.1 x 5.5mm (the actual pin diameter is
2mm).

You also want to check the insertion length which may or may not be
the same as the exposed length of the barrel depending on whether it's
flush with the outside of the housing etc.

In my case the exposed part is shown as 12+/-0.5mm and the barrel part
as 2.1 x 5.5mm in the detailed 10-page AC adapter specification.

The mating part is a CUI PJ-202A or similar.
--
Best regards,
Spehro Pefhany

Rick <rick@nomail.com> wrote in
news:eb0phg550lmaj6md6av5jr7sonkcoolifa@4ax.com:

> Need chart of actual size to determine barrel connector size.
>
> Does such a thing exist, or am I forced to buy one of each size
> connector? Its a bitch getting the right size particularly when
> buying online.
>
>
>

It looks like you are referring to inline crimp connectors for wire?

On Wednesday, August 18, 2021 at 12:39:48 PM UTC-4, Don Y wrote:
>
> The problem with barrel connectors is usually one of not knowing
> what you have in front of you (either the connector to be replaced
> *or* it's missing mate)
>
> "One of each" is the easiest way to handle this. There are
> many "universal" wall warts that come with a set of swappable
> connectors/plugs; this is an expedient for acquiring an
> assortment *and* having a usable power supply mated to same.
> Just "collecting connectors" has no *added* value!
>
> Note, in addition to inner and outer diameters (neglecting
> connectors with a *third*, center "pin"), you also need to
> be wary of the length of the barrel as some devices may
> recess the OTS connector too far inside the enclosure and need
> a mate with "longer reach".
>
> A micrometer or dial caliper can be used to check the OD of
> a cable-end connector; a drill index provides a handy reference
> for sizing the inner diameter.
>
> In practice, you will likely find a few connector sizes cover
> most of your needs.

A set like this is handy:

https://www.ebay.com/itm/313337021074

On 8/20/2021 4:15 AM, Michael Terrell wrote:
> On Wednesday, August 18, 2021 at 12:39:48 PM UTC-4, Don Y wrote:
>>
>> The problem with barrel connectors is usually one of not knowing
>> what you have in front of you (either the connector to be replaced
>> *or* it's missing mate)
>>
>> "One of each" is the easiest way to handle this. There are
>> many "universal" wall warts that come with a set of swappable
>> connectors/plugs; this is an expedient for acquiring an
>> assortment *and* having a usable power supply mated to same.
>> Just "collecting connectors" has no *added* value!
>>
>> Note, in addition to inner and outer diameters (neglecting
>> connectors with a *third*, center "pin"), you also need to
>> be wary of the length of the barrel as some devices may
>> recess the OTS connector too far inside the enclosure and need
>> a mate with "longer reach".
>>
>> A micrometer or dial caliper can be used to check the OD of
>> a cable-end connector; a drill index provides a handy reference
>> for sizing the inner diameter.
>>
>> In practice, you will likely find a few connector sizes cover
>> most of your needs.
>
> A set like this is handy:
>
> https://www.ebay.com/itm/313337021074

Exactly. If you have the (adjustable) power supply to which they
mate, all the better (cuz now you have a quick means of getting
power into a random device that you've encountered). But, a lab
supply will do, in a pinch.

[I routinely rescue these "universal power supplies" and have
a large box of assorted "plugs" that accompanied each of them.
Great when someone gives me a laptop or other device and forgets
to bring along the power supply!]

Regardless, just take the time to document the dimensions of the
individual plugs ("barrels") and then use them as go/nogo gauges
for whatever connector you seek.

Sadly, the color of the plastic "tips" is largely meaningless
(one could have hoped they'd have standardized on these, somehow)

Note the negth of the barrel can sometimes be a deal-breaker.
And, I've encountered some barrels that have "wings" (for want
of a better word) that allow the connector to be *locked*
into it's mate (so it won't easily pull out).

Rick <rick@nomail.com> wrote in
news:eb0phg550lmaj6md6av5jr7sonkcoolifa@4ax.com:

> Need chart of actual size to determine barrel connector size.
>
> Does such a thing exist, or am I forced to buy one of each size
> connector? Its a bitch getting the right size particularly when
> buying online.
>
>
>

Perfect for any lab:

<https://www.amazon.com/dp/B07C61434H>

Perfect for your printer...

Some sizes mentioned, that is...

https://www.ebay.com/itm/333829528525

On Friday, August 20, 2021 at 4:15:41 AM UTC-7, terrell....@gmail.com wrote:
> On Wednesday, August 18, 2021 at 12:39:48 PM UTC-4, Don Y wrote:
> >
> > The problem with barrel connectors is usually one of not knowing
> > what you have in front of you (either the connector to be replaced
> > *or* it's missing mate)
> >
> > "One of each" is the easiest way to handle this.
.....
> > In practice, you will likely find a few connector sizes cover
> > most of your needs.
> A set like this is handy:
>
> https://www.ebay.com/itm/313337021074

Yeah, but 'most of your needs' implies I'll need something more. Apparently
there's nothing in that kit that fits my old Macbook, or the LaCie external DVD,
or the Sony chumby.

My own needs are served by... haunting thrift stores and scarfing up the
likely-useful-someday items. This Dell adapter mates to and runs the Samsung
television fine, though I can't find either connector-part in any marketplace.

On 8/21/2021 1:34 PM, whit3rd wrote:
> On Friday, August 20, 2021 at 4:15:41 AM UTC-7, terrell....@gmail.com wrote:
>> On Wednesday, August 18, 2021 at 12:39:48 PM UTC-4, Don Y wrote:
>>>
>>> The problem with barrel connectors is usually one of not knowing
>>> what you have in front of you (either the connector to be replaced
>>> *or* it's missing mate)
>>>
>>> "One of each" is the easiest way to handle this.
> ....
>>> In practice, you will likely find a few connector sizes cover
>>> most of your needs.
>> A set like this is handy:
>>
>> https://www.ebay.com/itm/313337021074
>
> Yeah, but 'most of your needs' implies I'll need something more. Apparently

You've snipped "a few connector sizes" from that quote. Note that
most of these "kits" have a dozen or more "tips" available to choose from.

> there's nothing in that kit that fits my old Macbook, or the LaCie external DVD,
> or the Sony chumby.

If the LaCie is like mine, it's a 4 pin connector -- NOT a barrel connector.
And, wired differently from many other identical connectors (i.e., my LaCie
power adapters have been labeled "Only For Use With LaCie Devices").

[Note that the adapter kits often allow you to mate the plug to
the cable-end in such a way that you can intentionally reverse
the polarity -- center negative -- for those devices that use
that convention]

My Chumbys use a regular barrel connector (though admittedly small OD and
"long throat")

> My own needs are served by... haunting thrift stores and scarfing up the
> likely-useful-someday items.

One of my /pro bono/ activities involves a "recycler" so it's (relatively)
easy to find things -- eventually. The downside is that it is even EASIER
to find other items (in need of power adapters) that can be rescued! :<
So, the problem remains on-going, regardless of how many times I "solve" it!

> This Dell adapter mates to and runs the Samsung
> television fine, though I can't find either connector-part in any marketplace.

The newer (3 conductor) barrel connectors "talk" to the device being
powered so the powered device can refuse to power on if not fed by
an appropriate adapter. This adds another "non-mechanical" aspect to
fitting a supply to the device.

I keep a few cubic feet of power adapters (sorted by output voltage) on
hand as my first stop for locating a power supply for a particular
device. I also keep the power adapter aspect in mind when I choose
to rescue a device (or not). E.g., I no longer will tolerate an
external power adapter in something like an LCD monitor (which was
common, years ago).

For items (REALLY) worth the effort, I will fit a different power connection
to "remove" that dependency. I did this for a friend's portable keyboard
(organ) some months back as the portable aspect was brutal on the
original connector.

Rick wrote:
> Need chart of actual size to determine barrel connector size.
>
> Does such a thing exist, or am I forced to buy one of each size
> connector? Its a bitch getting the right size particularly when buying
> online.
>
>
Common: DC power connector (source) inner is a conductive sleeve;
various sizes outer, inner.

Weird variant: inner has a pin. It appears there may be as wide a
range of various sizes as well.

BUT no specs, no sources; a variant connector will always be part of
a device (say a small printer and its supply wall wart).

Anybody know where to find (and specify) a source of these connectors?

--
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