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Sci.Electronics.Basics -> Help: Making Electrical Contacts
There are 14 messages in this thread.
You are currently looking at messages 1 to 14.
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Author: Searcher7Date: 14:50 24-02-08
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Can anyone direct me to a materials chart for referencing materials
for electrical contacts?(Providing something like that exists).
I've had no luck with Google, and since I'll need to make contacts for
several projects I'm trying to get a good idea about what material/s I
should get. Specifically materials that will be handling the power
outputs of normal computer power supplies.
Thanks a lot.
Darren Harris
Staten Island, New York.
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Author: Tom BiasiDate: 15:01 24-02-08
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"Searcher7" <Searcher7@mail.con2.com> wrote in message
news:7c75c0c6-9ca3-473c-b209-c9943404d5ff@o10g2000hsf.googlegroups.com...
> Can anyone direct me to a materials chart for referencing materials
> for electrical contacts?(Providing something like that exists).
>
> I've had no luck with Google, and since I'll need to make contacts for
> several projects I'm trying to get a good idea about what material/s I
> should get. Specifically materials that will be handling the power
> outputs of normal computer power supplies.
>
> Thanks a lot.
>
> Darren Harris
> Staten Island, New York.
You will need to say a little more than you have if you expect some
meaningful help.
Tom
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Author: J.A. LegrisDate: 17:34 24-02-08
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On Feb 24, 2:50=A0pm, Searcher7 <Search...@mail.con2.com> wrote:
> Can anyone direct me to a materials chart for referencing materials
> for electrical contacts?(Providing something like that exists).
>
> I've had no luck with Google, and since I'll need to make contacts for
> several projects I'm trying to get a good idea about what material/s I
> should get. Specifically materials that will be handling the power
> outputs of normal computer power supplies.
>
> Thanks a lot.
>
> Darren Harris
> Staten Island, New York.
The word you're looking for may be "connector". Googling ( PC power
supply connector ) turned up the following:
http://www.playtool.com/pages/psuconnectors/connectors.html
http://en.wikipedia.org/wiki/Computer_power_supply
--
Joe
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Author: Searcher7Date: 20:33 24-02-08
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On Feb 24, 3:01=A0pm, "Tom Biasi" <tombi...@optonline.net> wrote:
> "Searcher7" <Search...@mail.con2.com> wrote in message
>
> news:7c75c0c6-9ca3-473c-b209-c9943404d5ff@o10g2000hsf.googlegroups.com...
>
> > Can anyone direct me to a materials chart for referencing materials
> > for electrical contacts?(Providing something like that exists).
>
> > I've had no luck with Google, and since I'll need to make contacts for
> > several projects I'm trying to get a good idea about what material/s I
> > should get. Specifically materials that will be handling the power
> > outputs of normal computer power supplies.
>
> > Thanks a lot.
>
> > Darren Harris
> > Staten Island, New York.
>
> You will need to say a little more than you have if you expect some
> meaningful help.
There is nothing else.
Like I said I want to make contacts. And all I'll need to determine is
the material and the thickness I will make each contact. Which is why
I asked if there was in existence a chart for referencing purposes.
Darren Harris
Staten Island, New York
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Author: Searcher7Date: 20:35 24-02-08
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On Feb 24, 5:34=A0pm, "J.A. Legris" <jaleg...@sympatico.ca> wrote:
> On Feb 24, 2:50=A0pm, Searcher7 <Search...@mail.con2.com> wrote:
>
> > Can anyone direct me to a materials chart for referencing materials
> > for electrical contacts?(Providing something like that exists).
>
> > I've had no luck with Google, and since I'll need to make contacts for
> > several projects I'm trying to get a good idea about what material/s I
> > should get. Specifically materials that will be handling the power
> > outputs of normal computer power supplies.
>
> > Thanks a lot.
>
> > Darren Harris
> > Staten Island, New York.
>
> The word you're looking for may be "connector". Googling ( PC power
> supply connector ) turned up the following:
>
> http://www.playtool.com/pages/psuconnectors/connectors.html
>
> http://en.wikipedia.org/wiki/Computer_power_supply
No, not connectors.
I want to make electrical contacts.
Darren Harris
Staten Island, New York.
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Author: JamieDate: 20:40 24-02-08
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Searcher7 wrote:
> On Feb 24, 3:01 pm, "Tom Biasi" <tombi...@optonline.net> wrote:
>
>>"Searcher7" <Search...@mail.con2.com> wrote in message
>>
>>news:7c75c0c6-9ca3-473c-b209-c9943404d5ff@o10g2000hsf.googlegroups.com...
>>
>>
>>>Can anyone direct me to a materials chart for referencing materials
>>>for electrical contacts?(Providing something like that exists).
>>
>>>I've had no luck with Google, and since I'll need to make contacts for
>>>several projects I'm trying to get a good idea about what material/s I
>>>should get. Specifically materials that will be handling the power
>>>outputs of normal computer power supplies.
>>
>>>Thanks a lot.
>>
>>>Darren Harris
>>>Staten Island, New York.
>>
>>You will need to say a little more than you have if you expect some
>>meaningful help.
>
>
> There is nothing else.
>
> Like I said I want to make contacts. And all I'll need to determine is
> the material and the thickness I will make each contact. Which is why
> I asked if there was in existence a chart for referencing purposes.
>
> Darren Harris
> Staten Island, New York
Tungsten material for the contact surface and having them rounded would
be good.
--
"I'd rather have a bottle in front of me than a frontal lobotomy"
"Daily Thought:
Thoughts are like assholes, every one, has one.
http://webpages.charter.net/jamie_5";
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Author: steamerDate: 21:22 24-02-08
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--How much power and how much arcing do you anticipate? Also how
fast do you want to make contact and how often do you need to do it? These
variables need to be pinned down before you decide on a material.
--
"Steamboat Ed" Haas : Don't forget to spay and
Hacking the Trailing Edge! : neuter your politicians...
www.nmpproducts.com
---Decks a-wash in a sea of words---
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Author: Tim WilliamsDate: 21:32 24-02-08
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You aren't understanding from the other responses that you have said
nothing about: environment, mechanical robustness, conductivity, and a slew
of other imaginable things that kind of have to be known before any
self-respecting engineer here can specify anything.
I'm going to go out on a limb and suggest you look at brass, phosphor
bronze or beryllium bronze stock. These metals are springy, easy to work,
and reasonably conductive (being alloys, they are quite a bit more
resistive than pure copper, but not so bad as like...iron).
Relay contacts are typically copper or brass rails with silver contacts.
The silver may be alloyed with cadmium, etc., for weld resistance, or
mercury (the term being amalgamated rather than alloyed) for low level
contacts (audio switching, for instance). Tungsten is the king of
refractory metals, but not the greatest in atmosphere, and not the greatest
conductor either. It can be bonded with copper, making a very hard,
conductive, refractory contact material. Copper filled graphite is used
for high quality motor brushes.
In adverse environments, stainless steel, titanium, etc. may be more useful
than copper alloys, despite the low conductivity. Or even clad materials
(pricey) to get the best of both worlds.
Ya know, I find it hard to believe you can't just find "phosphor bronze" on
Google. You must not be trying in the right direction. I don't happen to
know offhand of any sort of conclusive contact chart, although I can
imagine people in the business don't really need one anyway, hence your
problem...
Tim
--
Deep Fryer: A very philosophical monk.
Website @ http://webpages.charter.net/dawill/tmoranwms
"Searcher7" <Searcher7@mail.con2.com> wrote in message
news:7c75c0c6-9ca3-473c-b209-c9943404d5ff@o10g2000hsf.googlegroups.com...
> Can anyone direct me to a materials chart for referencing materials
> for electrical contacts?(Providing something like that exists).
>
> I've had no luck with Google, and since I'll need to make contacts for
> several projects I'm trying to get a good idea about what material/s I
> should get. Specifically materials that will be handling the power
> outputs of normal computer power supplies.
>
> Thanks a lot.
>
> Darren Harris
> Staten Island, New York.
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Author: BobGDate: 21:55 24-02-08
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I think there is a big convention of Electrical Contractors up near
you in the Convention Center every year. This would be an excellent
place to make some Electrical Contacts.
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Author: John FieldsDate: 11:16 25-02-08
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On Sun, 24 Feb 2008 17:33:52 -0800 (PST), Searcher7
<Searcher7@mail.con2.com> wrote:
>On Feb 24, 3:01 pm, "Tom Biasi" <tombi...@optonline.net> wrote:
>> "Searcher7" <Search...@mail.con2.com> wrote in message
>>
>> news:7c75c0c6-9ca3-473c-b209-c9943404d5ff@o10g2000hsf.googlegroups.com...
>>
>> > Can anyone direct me to a materials chart for referencing materials
>> > for electrical contacts?(Providing something like that exists).
>>
>> > I've had no luck with Google, and since I'll need to make contacts for
>> > several projects I'm trying to get a good idea about what material/s I
>> > should get. Specifically materials that will be handling the power
>> > outputs of normal computer power supplies.
>>
>> > Thanks a lot.
>>
>> > Darren Harris
>> > Staten Island, New York.
>>
>> You will need to say a little more than you have if you expect some
>> meaningful help.
>
>There is nothing else.
---
There certainly is!
For starters, before you can choose the optimum material for the job
you'll need to know how much current the contacts will be expected
to carry, the voltage they'll need to break, the temperature they
must not exceed, how much (make and break) bounce you can tolerate,
how tightly they must be pressed together, the environment they must
live in while resisting corrosion, and on and on...
---
>Like I said I want to make contacts. And all I'll need to determine is
>the material and the thickness I will make each contact. Which is why
>I asked if there was in existence a chart for referencing purposes.
---
Not as far as I know.
Your best bet might be to go to various relay and switch
manufacturers' web sites and find out what they use for contact
materials and then Google on those materials for more detail.
--
JF
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Author: NewsGroupsDate: 15:16 25-02-08
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"Searcher7" <Searcher7@mail.con2.com> wrote in message
news:7c75c0c6-9ca3-473c-b209-c9943404d5ff@o10g2000hsf.googlegroups.com...
> Can anyone direct me to a materials chart for referencing materials
> for electrical contacts?(Providing something like that exists).
>
> I've had no luck with Google, and since I'll need to make contacts for
> several projects I'm trying to get a good idea about what material/s I
> should get. Specifically materials that will be handling the power
> outputs of normal computer power supplies.
See here for more info about contacts.
http://www.e-c-l.com/
>
> Thanks a lot.
>
> Darren Harris
> Staten Island, New York.
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Author: RST Engineering (jw)Date: 15:18 25-02-08
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John is correct, but only if you want to go into production on the thing.
If all you want is something for hobby use, the last time I had to make
contacts I bought a junk silver dime, a dime produced prior to ?? 1960
something. I then used a turret punch to punch out small 1/8" diameter
pieces of the dime, soldered a wire to one side and used the other side for
the contact. All in all, you can get about 5 sets of contacts out of a dime
for a cost of about two bits apiece.
Jim
>>Like I said I want to make contacts. And all I'll need to determine is
>>the material and the thickness I will make each contact. Which is why
>>I asked if there was in existence a chart for referencing purposes.
>
> ---
> Not as far as I know.
>
> Your best bet might be to go to various relay and switch
> manufacturers' web sites and find out what they use for contact
> materials and then Google on those materials for more detail.
>
> --
> JF
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Author: JosephKKDate: 08:55 26-02-08
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Searcher7 wrote:
> On Feb 24, 3:01 pm, "Tom Biasi" <tombi...@optonline.net> wrote:
>> "Searcher7" <Search...@mail.con2.com> wrote in message
>>
>> news:7c75c0c6-9ca3-473c-b209-c9943404d5ff@o10g2000hsf.googlegroups.com...
>>
>>> Can anyone direct me to a materials chart for referencing materials
>>> for electrical contacts?(Providing something like that exists).
>>> I've had no luck with Google, and since I'll need to make contacts for
>>> several projects I'm trying to get a good idea about what material/s I
>>> should get. Specifically materials that will be handling the power
>>> outputs of normal computer power supplies.
>>> Thanks a lot.
>>> Darren Harris
>>> Staten Island, New York.
>> You will need to say a little more than you have if you expect some
>> meaningful help.
>
> There is nothing else.
>
> Like I said I want to make contacts. And all I'll need to determine is
> the material and the thickness I will make each contact. Which is why
> I asked if there was in existence a chart for referencing purposes.
>
> Darren Harris
> Staten Island, New York
All of those connectors are standard, just buy them. The cost of the
tooling will bury you.
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Author: Searcher7Date: 20:47 27-02-08
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On Feb 26, 8:55=A0am, JosephKK <quiettechb...@yahoo.com> wrote:
> Searcher7wrote:
> > On Feb 24, 3:01 pm, "Tom Biasi" <tombi...@optonline.net>
wrote:
> >> "Searcher7" <Search...@mail.con2.com> wrote in message
>
> >>news:7c75c0c6-9ca3-473c-b209-c9943404d5ff@o10g2000hsf.googlegroups.com..=
.
>
> >>> Can anyone direct me to a materials chart for referencing materials
> >>> for electrical contacts?(Providing something like that exists).
> >>> I've had no luck with Google, and since I'll need to make contacts
for=
> >>> several projects I'm trying to get a good idea about what material/s
I=
> >>> should get. Specifically materials that will be handling the power
> >>> outputs of normal computer power supplies.
> >>> Thanks a lot.
> >>> Darren Harris
> >>> Staten Island, New York.
> >> You will need to say a little more than you have if you expect some
> >> meaningful help.
>
> > There is nothing else.
>
> > Like I said I want to make contacts. And all I'll need to determine is
> > the material and the thickness I will make each contact. Which is why
> > I asked if there was in existence a chart for referencing purposes.
>
> > Darren Harris
> > Staten Island, New York
>
> All of those connectors are standard, just buy them. =A0The cost of the
> tooling will bury you.- Hide quoted text -
>
> - Show quoted text -
Ok. One person took a wrong turn and everyone else followed.(I knew
this was going to happen).
The first paragraph in the first post of this thread was the only
question I was seeking an answer for.
Making, breaking, speed of, wiping, arcing, corrosion resistance,
wear, electrical conductivity and resistance, thickness and
flexibility, bounce, size, shape, ect., ect. are things I will be
deciding on for the various projects.
I did say that I'd be dealing with materials that will be handling the
power outputs of normal computer power supplies.
But I didn't want to get into all of the specifics here for each and
every project. It was just a simple request for a reference chart if
one existed. From there I'd be able to determine all the parameters
myself. But obviously no such chart exists.
Thanks anyway.
Darren Harris
Staten Island, New York.
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