Zero ohm resistor ?

[mowhoong]

yesterday I brough a x'mas three kit set for soldering, But the circuit use
four nos. of zero ohm resistor.Can any person know what is that mean, can we
use jumper wire to substitute ? Thank you.

 

[peterken]

2 possibilities...
- it's just a jumper wire to ease crossing on the pcb
- it's used as "fusible resistor" for protection of the circuit



"mowhoong" <mowhoong@hotmail.com> wrote in message
news:3d7f87e3.0411190756.c907917@posting.google.com...

yesterday I brough a x'mas three kit set for soldering, But the circuit
use
four nos. of zero ohm resistor.Can any person know what is that mean, can
we
use jumper wire to substitute ? Thank you.

 

[Clarence]

"mowhoong" <mowhoong@hotmail.com> wrote in message
news:3d7f87e3.0411190756.c907917@posting.google.com...
yesterday I brough a x'mas three kit set for soldering, But the circuit
use
four nos. of zero ohm resistor.Can any person know what is that mean, can
we use jumper wire to substitute ? Thank you.

"peterken" <peter273@hotmail.com> wrote in message
news:fYond.29373$SW1.1357948@phobos.telenet-ops.be...

2 possibilities...
- it's just a jumper wire to ease crossing on the pcb
- it's used as "fusible resistor" for protection of the circuit

TOP POST REPAIRED! Ecch!


Yes. However "Zero Ohm Resistors" are commonly used to select options or in
some cases (since the actual resistance is about.01 ohms) as a current sense
resistor.

Never used as a "fusible resistor" since it will carry much more current than
any other element in the circuit! Also, not made to open readily! A diode is
a better fusible component.

 

[rein wiehler]

peterken wrote:

2 possibilities...
- it's just a jumper wire to ease crossing on the pcb
- it's used as "fusible resistor" for protection of the circuit



"mowhoong" <mowhoong@hotmail.com> wrote in message
news:3d7f87e3.0411190756.c907917@posting.google.com...
yesterday I brough a x'mas three kit set for soldering, But the
circuit
use
four nos. of zero ohm resistor.Can any person know what is that
mean, can
we
use jumper wire to substitute ? Thank you.

sounds like a jumper to accommadate single sided pbc layout

 

[CFoley1064]

Subject: Re: Zero ohm resistor ?
From: "Clarence" no@No.com
Date: 11/19/2004 2:38 PM Central Standard Time
Message-id: <vRsnd.19865$zx1.19092@newssvr13.news.prodigy.com

snip
A diode is
a better fusible component.


Sorry, not quite. The old "crystal" diodes would fail open pretty reliably,

but modern diodes frequently fail shorted, too.

Fusible resistors have their place. The spec tells their current rating.
Also, several manufacturers make small axial lead fuses which have the same
form factor as a 1/4W resistor.

Good luck
Chris

 

[Clarence]

"CFoley1064" <cfoley1064@aol.com> wrote in message
news:20041119185227.21610.00000880@mb-m12.aol.com...

Subject: Re: Zero ohm resistor ?
From: "Clarence" no@No.com
Date: 11/19/2004 2:38 PM Central Standard Time
Message-id: <vRsnd.19865$zx1.19092@newssvr13.news.prodigy.com

snip
A diode is
a better fusible component.


Sorry, not quite. The old "crystal" diodes would fail open pretty reliably,
but modern diodes frequently fail shorted, too.

Fusible resistors have their place. The spec tells their current rating.
Also, several manufacturers make small axial lead fuses which have the same
form factor as a 1/4W resistor.

Good luck
Chris

Then YOU should use the fuse!

 

[Rich Grise]

On Fri, 19 Nov 2004 07:56:41 -0800, mowhoong wrote:

yesterday I brough a x'mas three kit set for soldering, But the circuit use
four nos. of zero ohm resistor.Can any person know what is that mean, can we
use jumper wire to substitute ? Thank you.

They are zero-ohm "jumper resistors", IOW, the zero-ohm "resistor" _is_
the jumper wire.

http://www.irctt.com/pdf_files/ZEROHM.pdf

And as has been said by others, they are easier for the stuffing machine
to handle than wires with spaghetti.

Cheers!
Rich

 

[Rich Grise]

On Fri, 19 Nov 2004 23:52:27 +0000, CFoley1064 wrote:

Subject: Re: Zero ohm resistor ?
From: "Clarence" no@No.com
Date: 11/19/2004 2:38 PM Central Standard Time
Message-id: <vRsnd.19865$zx1.19092@newssvr13.news.prodigy.com

snip
A diode is
a better fusible component.


Sorry, not quite. The old "crystal" diodes would fail open pretty reliably,
but modern diodes frequently fail shorted, too.

Fusible resistors have their place. The spec tells their current rating.
Also, several manufacturers make small axial lead fuses which have the same
form factor as a 1/4W resistor.

I've worked for a battery charger manufacturer, and they used "fuse wire"
which was rated in amps, like 20, 30, 40 and so on. When they blow, it's a
mess since molten metal drips all over everything. It handled like fat
solder. A fusible link was generally a couple of inches, with a lug at
each end (crimped _and_ solder-dipped =:-O ), bolted right onto the diode
stud.

A fusible resistor is, as he's said, a resistor that will open like a fuse.
If what you're looking for is just fusing, then probably a fuse would be
your best bet.

I'm only a tech[0], but I would _never_ use _any_ component in a way where
the things that are supposed to cause it to blow up are a part of the
normal operation of the circuit. In other words, _don't_ use a diode where
you're supposed to use a fuse!

Good Luck!
Rich

[0] with approx. 45 years' experience, only ~10 of which were as a larva. ;-)

 

[hotkey]

yes

"mowhoong" <mowhoong@hotmail.com> wrote in message
can we
> use jumper wire to substitute ? Thank you.

 

[petrus bitbyter]

"mowhoong" <mowhoong@hotmail.com> schreef in bericht
news:3d7f87e3.0411190756.c907917@posting.google.com...

yesterday I brough a x'mas three kit set for soldering, But the circuit
use
four nos. of zero ohm resistor.Can any person know what is that mean, can
we
use jumper wire to substitute ? Thank you.

Zero Ohms resistors are used for wire bridges on single sided printed
circuit boards. They are used instead of pieces of wire as they can be
handled easier, especially by placing machines. Ever saw a board with tens
of them. Obviously designed by a lazy or incompetent pcb designer. As these
resistors are made to replace jumper wires, you can replace them by the
jumper wires they replace

petrus bitbyter


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