22 Oct
2020
22 Oct
'20
11:30 a.m.
Hi all,
Oddball question here: has anyone ever seen a way to cap off or protect
standard 0.1" pin header jumpers? Maybe there exist jumper plugs that *don't
*conduct across the two pins? I'm looking at a piece of hardware that has
some jumper pins on top of the PC board and I'd like to protect against
anything accidentally making contact. I have seen surface mount 0.05 pitch
pin headers come from their manufacturer with protective caps, but I
haven't been able to find anything to apply to 0.1" pin headers that I
could by aftermarket.
Any ideas would be appreciated!
thanks
brian
22 Oct
22 Oct
11:35 a.m.
I have not seen a cover but how about an empty header shell. I forget if they're
called C-Grid but it's the ones you have to crimp pins and insert into the shell. I
have those "in stock" but usually not bigger than 2x13, but if I wanted to
protect something, that's what I'd grab off my shelf.
?On 10/22/20, 2:31 PM, "cctalk on behalf of brian--- via cctalk"
<cctalk-bounces at classiccmp.org on behalf of cctalk at classiccmp.org> wrote:
Hi all,
Oddball question here: has anyone ever seen a way to cap off or protect
standard 0.1" pin header jumpers? Maybe there exist jumper plugs that *don't
*conduct across the two pins? I'm looking at a piece of hardware that has
some jumper pins on top of the PC board and I'd like to protect against
anything accidentally making contact. I have seen surface mount 0.05 pitch
pin headers come from their manufacturer with protective caps, but I
haven't been able to find anything to apply to 0.1" pin headers that I
could by aftermarket.
Any ideas would be appreciated!
thanks
brian
2:30 p.m.
that's a thought, thanks. This is 2x3. That could work.
I may end up just clipping off the pins!
brian
On Thu, Oct 22, 2020 at 11:35 AM Richard Cini <rich.cini at verizon.net> wrote:
I have not seen a cover but how about an empty header
shell. I forget if
they're called C-Grid but it's the ones you have to crimp pins and insert
into the shell. I have those "in stock" but usually not bigger than 2x13,
but if I wanted to protect something, that's what I'd grab off my shelf.
?On 10/22/20, 2:31 PM, "cctalk on behalf of brian--- via cctalk" <
cctalk-bounces at classiccmp.org on behalf of cctalk at classiccmp.org> wrote:
Hi all,
Oddball question here: has anyone ever seen a way to cap off or protect
standard 0.1" pin header jumpers? Maybe there exist jumper plugs that
*don't
*conduct across the two pins? I'm looking at a piece of hardware that
has
some jumper pins on top of the PC board and I'd like to protect against
anything accidentally making contact. I have seen surface mount 0.05
pitch
pin headers come from their manufacturer with protective caps, but I
haven't been able to find anything to apply to 0.1" pin headers that I
could by aftermarket.
Any ideas would be appreciated!
thanks
brian
11:38 a.m.
On 10/22/20 11:30 AM, brian--- via cctalk wrote:
Hi all,
Oddball question here: has anyone ever seen a way to cap off or protect
standard 0.1" pin header jumpers? Maybe there exist jumper plugs that *don't
*conduct across the two pins? I'm looking at a piece of hardware that has
some jumper pins on top of the PC board and I'd like to protect against
anything accidentally making contact. I have seen surface mount 0.05 pitch
pin headers come from their manufacturer with protective caps, but I
haven't been able to find anything to apply to 0.1" pin headers that I
could by aftermarket.
Any ideas would be appreciated!
thanks
brian
You can simple pull out the metal insert in most jumpers. Of course,
they won't stay on quite as well...
--Chuck
12:14 p.m.
On 10/22/2020 11:30 AM, brian--- via cctalk wrote:
Hi all,
Oddball question here: has anyone ever seen a way to cap off or protect
standard 0.1" pin header jumpers? Maybe there exist jumper plugs that *don't
*conduct across the two pins? I'm looking at a piece of hardware that has
some jumper pins on top of the PC board and I'd like to protect against
anything accidentally making contact. I have seen surface mount 0.05 pitch
pin headers come from their manufacturer with protective caps, but I
haven't been able to find anything to apply to 0.1" pin headers that I
could by aftermarket.
Any ideas would be appreciated!
I'd worry that not just the jumper pins can be shorted, and whether what
was really needed was a proper enclosure. If not, then what I'd do is
probably to go to my favorite vendor for RasPi/Arduino junk (AdaFruit,
perhaps). I'd buy an assortment of shrouds, of the sort they use to
build their cables (which fit over header pins like these) -- the
assortment is by far the cheapest way I know to obtain them. Then I'd
buy the crimp pins that go inside, and insert them without wires. If I
was super paranoid, I'd use my flush cutters to trim off a bit of the
area meant to crimp the insulation, so that no metal was near the top
when I put my connector on the header.
You can also use the housings to neatly build up your most used jumper
configurations for quick changes.
Vince
12:27 p.m.
On 10/22/20 12:14 PM, Vincent Slyngstad via cctalk wrote:
I'd worry that not just the jumper pins can be
shorted, and whether what
was really needed was a proper enclosure.? If not, then what I'd do is
probably to go to my favorite vendor for RasPi/Arduino junk (AdaFruit,
perhaps).? I'd buy an assortment of shrouds, of the sort they use to
build their cables (which fit over header pins like these) -- the
assortment is by far the cheapest way I know to obtain them.? Then I'd
buy the crimp pins that go inside, and insert them without wires.? If I
was super paranoid, I'd use my flush cutters to trim off a bit of the
area meant to crimp the insulation, so that no metal was near the top
when I put my connector on the header.
I don't know if it's applicable, but I use hunks of extruded polystyrene
insulating foam to protect the pins on my wire-wrapped projects.
--Chuck
1:12 p.m.
On Oct 22, 2020, at 3:27 PM, Chuck Guzis via cctalk
<cctalk at classiccmp.org> wrote:
On 10/22/20 12:14 PM, Vincent Slyngstad via cctalk wrote:
Not a good idea with ESD sensitive electronics. You could use antistatic foam, though.
Its resistance is high enough that electronics won't notice its presence.
A variation on the connector idea: use an insulation-displacement type connector (the kind
that you mount onto a flat cable assembly) without the cable. Just snap on the cover over
the i-d pins and you have a fully insulated assembly with the pins acting as spring clamps
for the jumper pins.
paul
I'd worry that not just the jumper pins can
be shorted, and whether what
was really needed was a proper enclosure. If not, then what I'd do is
probably to go to my favorite vendor for RasPi/Arduino junk (AdaFruit,
perhaps). I'd buy an assortment of shrouds, of the sort they use to
build their cables (which fit over header pins like these) -- the
assortment is by far the cheapest way I know to obtain them. Then I'd
buy the crimp pins that go inside, and insert them without wires. If I
was super paranoid, I'd use my flush cutters to trim off a bit of the
area meant to crimp the insulation, so that no metal was near the top
when I put my connector on the header.
I don't know if it's applicable, but I use hunks of extruded polystyrene
insulating foam to protect the pins on my wire-wrapped projects.
2:12 p.m.
On 10/22/20 1:12 PM, Paul Koning wrote:
Not a good idea with ESD sensitive electronics. You could use antistatic foam, though.
Its resistance is high enough that electronics won't notice its presence.
I've cut the stuff six ways to Sunday and I've never had the problem of
the clingy crumbs in XPS, so there's probably some antistatic additive
in that, probably part of the FR treatment.
A variation on the connector idea: use an
insulation-displacement type connector (the kind that you mount onto a flat cable
assembly) without the cable. Just snap on the cover over the i-d pins and you have a
fully insulated assembly with the pins acting as spring clamps for the jumper pins.
That's not terribly useful when you have only one or two positions to
protect, is it?
--Chuck
2:33 p.m.
On Thu, 22 Oct 2020, Chuck Guzis via cctalk wrote:
Following the idea however you can use a wire-to-board connector housing
like from Harwin M20 series with just empty contacts inserted. They are
widely available and start from 1x1 even.
<https://www.harwin.com/connectors-hardware/pcb-connectors/2-54mm-pitch-pcb-connectors/>
Maciej
A variation on
the connector idea: use an insulation-displacement type
connector (the kind that you mount onto a flat cable assembly) without
the cable. Just snap on the cover over the i-d pins and you have a
fully insulated assembly with the pins acting as spring clamps for the
jumper pins.
That's not terribly useful when you have only one or two positions to
protect, is it? 
3:08 p.m.
I?ve just stripped off a short piece of insulation from hookup wire and slipped it over
the pin.Fits tight and can be removed and it's cheap.
Sent from my iPhone
On Oct 22, 2020, at 14:33, Maciej W. Rozycki via
cctalk <cctalk at classiccmp.org> wrote:
?On Thu, 22 Oct 2020, Chuck Guzis via cctalk wrote:
Following the idea however you can use a wire-to-board connector housing
like from Harwin M20 series with just empty contacts inserted. They are
widely available and start from 1x1 even.
<https://www.harwin.com/connectors-hardware/pcb-connectors/2-54mm-pitch-pcb-connectors/>
Maciej
A
variation on the connector idea: use an insulation-displacement type
connector (the kind that you mount onto a flat cable assembly) without
the cable. Just snap on the cover over the i-d pins and you have a
fully insulated assembly with the pins acting as spring clamps for the
jumper pins.
That's not terribly useful when you have only one or two positions to
protect, is it?
3:36 p.m.
And environmentally
conscious because it?s recycling. -:
Sent from my iPhone
On Oct 22, 2020, at 15:21, Maciej W. Rozycki <macro
at linux-mips.org> wrote:
?On Thu, 22 Oct 2020, Wayne S wrote:
I?ve just stripped off a short piece of
insulation from hookup wire and
slipped it over the pin.Fits tight and can be removed and it's cheap.
I guess it's as cheap as you can get. :)
Maciej 
9:20 p.m.
On 10/22/2020 3:36 PM, Wayne S via cctalk wrote:
And environmentally
conscious because it?s recycling. -:
Sent from my iPhone
> On Oct 22, 2020, at 15:21, Maciej W. Rozycki <macro at linux-mips.org> wrote:
>
> ?On Thu, 22 Oct 2020, Wayne S wrote:
>
>> I?ve just stripped off a short piece of insulation from hookup wire and
>> slipped it over the pin.Fits tight and can be removed and it's cheap.
> I guess it's as cheap as you can get. :)
>
> Maciej
Some controllers which were made for such as SASI to MFM, and QIC and
the like had place holder jumpers on all the pinned connections because
they were not being packaged by the vendors, and having customers
package them in odd places left the chance that they could have things
drop on those connections.
Also on boards which are conformal coated they are common as well when
used.?? Usually with some other means to secure the option area.
thanks
jim
3:01 p.m.
Why couldn't you get a piece of #20 wire and strip off an inch or so. Bend
it into a U to block out two pins.
It might need #18 or #22 but you get the idea.
Marc
On Thu, Oct 22, 2020 at 11:31 AM brian--- via cctalk <cctalk at classiccmp.org>
wrote:
Hi all,
Oddball question here: has anyone ever seen a way to cap off or protect
standard 0.1" pin header jumpers? Maybe there exist jumper plugs that
*don't
*conduct across the two pins? I'm looking at a piece of hardware that has
some jumper pins on top of the PC board and I'd like to protect against
anything accidentally making contact. I have seen surface mount 0.05 pitch
pin headers come from their manufacturer with protective caps, but I
haven't been able to find anything to apply to 0.1" pin headers that I
could by aftermarket.
Any ideas would be appreciated!
thanks
brian
23 Oct
23 Oct
4:24 p.m.
On Thu, Oct 22, 2020 at 11:30:40AM -0700, brian--- via cctalk wrote:
Oddball question here: has anyone ever seen a way to
cap off or protect
standard 0.1" pin header jumpers?
I prefer to not leave boards in places where stuff like pin headers can be
damaged. And really, pin headers are the least of your worries: they're easy to
replace and dirt cheap, unlike some of the more delicate and exotic components.
[...]
Any ideas would be appreciated!
You can use what is colloquially known as a "DuPont connector", which is
designed to mate with pin headers. They're more typically used to run wires to
pin headers -- for example the front panel lights and buttons on a PC -- but
you can skip the wires when you only need a mechanical rather than electrical
connection.
A starter kit with the special crimp tool, header shells, and male and female
pins to fit in the shells costs around ?30 from Amazon. Don't do what I did and
try and cut corners by just buying a cheap box of shells and pins and assuming
you can wing it with a regular crimp tool or pliers, because that just results
in a knackered connector and another Amazon order.
The kit will come with a variety of header shells and not just the 1x2 of
jumpers. Given that pin headers are quite gregarious, you'll find the larger
shells useful for capping and/or configuring multiple jumpers in parallel.
1478
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-
abuse＠cabal.org.uk -
brian＠quarterbyte.com -
cclist＠sydex.com -
cramcram＠gmail.com -
jwsmail＠jwsss.com -
macro＠linux-mips.org -
paulkoning＠comcast.net -
rich.cini＠verizon.net -
v.slyngstad＠frontier.com -
wayne.sudol＠hotmail.com