low cost 1/4W resistor kit o

[engeecorp]

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300320789926

This is a kit of 2500 1/4W metal film resistors as listed below. They
are all bagged and labeled. The tolerance is 1%. 50 components of each
value. These resistors are genuine ROHS.
These are true metal film resistors. We caution the customers to
differentiate true metal film resistors from fake metal film resistors
and carbon film resistors. The metal film resistors have excellent
temperature stability. You can tell this by putting an iron close to
the resistor and measure with multimeter. The metal film resistors do
not change drastically while the fake ones do.

The pin material is copper, covered with zink, with ~0.5mm diameter.
Exact datasheet is available on request.


1 ohm 7.5 ohm 10 ohm 22 ohm 39 ohm
47 ohm 68 ohm 75 ohm 100 ohm 130ohm
150 ohm 220 ohm 360 ohm 470 ohm 680 ohm
1 kohm 1.3 kohm 1.8 kohm 2.2 kohm 3 kohm
3.6 kohm 3.9 kohm 4.7 kohm 5.6 kohm 6.8 kohm
8.2 kohm 10 kohm 12 kohm 22 kohm 33 kohm
39 kohm 47 kohm 56 kohm 68 kohm 100 kohm
130 kohm 150 kohm 180 kohm 220 kohm 270 kohm
330 kohm 390 kohm 470 kohm 560 kohm 680 kohm
1 Mohm 2.7 Mohm 3.3 Mohm 4.7 Mohm 10 Mohm

 

[Jon Kirwan]

On Sat, 4 Jul 2009 20:10:29 -0700 (PDT), engeecorp
<lathi.tan@gmail.com> wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300320789926

This seller does it cheaper:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110408254551

Even at the full "buy it now" price of $12.99, it comes to only $16.23
for 2500, not $18.69. They also not only make the same claim about
metal film, but include a nice chart. Of course, the only way to tell
is to buy and test.

Jon

 

[Michael A. Terrell]

Jon Kirwan wrote:

On Sat, 4 Jul 2009 20:10:29 -0700 (PDT), engeecorp
lathi.tan@gmail.com> wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300320789926

This seller does it cheaper:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110408254551

Even at the full "buy it now" price of $12.99, it comes to only $16.23
for 2500, not $18.69. They also not only make the same claim about
metal film, but include a nice chart. Of course, the only way to tell
is to buy and test.

Jon

Why would you want to buy from a Chinese spammer?


--
You can't have a sense of humor, if you have no sense!

 

[Jon Kirwan]

On Sun, 05 Jul 2009 01:56:19 -0400, "Michael A. Terrell"
<mike.terrell@earthlink.net> wrote:

Jon Kirwan wrote:

On Sat, 4 Jul 2009 20:10:29 -0700 (PDT), engeecorp
lathi.tan@gmail.com> wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300320789926

This seller does it cheaper:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110408254551

Even at the full "buy it now" price of $12.99, it comes to only $16.23
for 2500, not $18.69. They also not only make the same claim about
metal film, but include a nice chart. Of course, the only way to tell
is to buy and test.

Jon

Why would you want to buy from a Chinese spammer?

What makes you imagine that was my motive?

Jon

 

[Paul E. Schoen]

"Jon Kirwan" <jonk@infinitefactors.org> wrote in message
newsoa0555c182737g7g2ikoo414hoor5k521@4ax.com...

On Sat, 4 Jul 2009 20:10:29 -0700 (PDT), engeecorp
lathi.tan@gmail.com> wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300320789926

This seller does it cheaper:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110408254551

Even at the full "buy it now" price of $12.99, it comes to only $16.23
for 2500, not $18.69. They also not only make the same claim about
metal film, but include a nice chart. Of course, the only way to tell
is to buy and test.

These appear to 5% Carbon Film resistors. Their metal film resistor
assortment is item 110408932514, which is 50pcs each of 10 values from 1R00
to 100K, for $12.99 or $0.026 each.

Mouser has bags of 200 pcs of 1% metal film resistors in the exact values
you may need for $0.02 each. If you need 1% metal film with 50 ppm
stability then you probably need specific values.

And who uses leaded parts anymore? Mouser has 1% thick film 0805 resistors,
1/8W, 100ppm, for $0.02 ea in 100 qty, and $0.01 ea in 1000 qty.

Paul

 

[Jon Kirwan]

On Sun, 05 Jul 2009 20:38:45 GMT, "Paul E. Schoen" <paul@peschoen.com>
wrote:

"Jon Kirwan" <jonk@infinitefactors.org> wrote in message
newsoa0555c182737g7g2ikoo414hoor5k521@4ax.com...
On Sat, 4 Jul 2009 20:10:29 -0700 (PDT), engeecorp
lathi.tan@gmail.com> wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300320789926

This seller does it cheaper:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110408254551

Even at the full "buy it now" price of $12.99, it comes to only $16.23
for 2500, not $18.69. They also not only make the same claim about
metal film, but include a nice chart. Of course, the only way to tell
is to buy and test.

These appear to 5% Carbon Film resistors.

Bingo.

That was one motivation I had. I wanted to see if the OP (or others,
as an after-thought) were reading at all. But there were at least two
other reasons I posted this link in this _rare_ case for me. I
haven't mentioned those, yet.

Their metal film resistor
assortment is item 110408932514, which is 50pcs each of 10 values from 1R00
to 100K, for $12.99 or $0.026 each.

Mouser has bags of 200 pcs of 1% metal film resistors in the exact values
you may need for $0.02 each. If you need 1% metal film with 50 ppm
stability then you probably need specific values.

And who uses leaded parts anymore? Mouser has 1% thick film 0805 resistors,
1/8W, 100ppm, for $0.02 ea in 100 qty, and $0.01 ea in 1000 qty.

Hobbyists will probably want leaded parts for their frequent one-off
stuff. At least, I do.

Jon

 

[Paul E. Schoen]

"Jon Kirwan" <jonk@infinitefactors.org> wrote in message
news:k372559tro8uoivdhhn3kraa792ldhrjjp@4ax.com...

On Sun, 05 Jul 2009 20:38:45 GMT, "Paul E. Schoen" <paul@peschoen.com
wrote:

These appear to 5% Carbon Film resistors.

Bingo.

That was one motivation I had. I wanted to see if the OP (or others,
as an after-thought) were reading at all. But there were at least two
other reasons I posted this link in this _rare_ case for me. I
haven't mentioned those, yet.

I did notice that the address for the OP is in the US, while the others are
in China. Yet I'm sure they all come from China one way or another. And the
OP's assortment seems to be a good value, although I do not like to
encourage NG spamming by making a purchase.

And who uses leaded parts anymore? Mouser has 1% thick film 0805
resistors,
1/8W, 100ppm, for $0.02 ea in 100 qty, and $0.01 ea in 1000 qty.

Hobbyists will probably want leaded parts for their frequent one-off
stuff. At least, I do.

I am probably spoiled because I have an infinite supply of surplus leaded
parts for any breadboard or deadbug projects I may want to do. But usually
I just use LTSpice to design and test simple linear circuits, and I rarely
feel the need or motivation to actually build any of them. Otherwise, I do
any digital stuff with PICs, and external analog stuff is usually pretty
simple.

For anything that I might want to make in any quantity, I have become quite
comfortable with larger SMT parts such as 0805 and SOIC, and with PCB
prices being so cheap now, I can put a lot of circuitry on a small board
and I often add extra circuitry for variations and experimental use. A year
ago I avoided SMT; now it is my friend, and I have a good assortment of
parts.

Paul

 

[Jon Kirwan]

On Sun, 05 Jul 2009 22:19:24 GMT, "Paul E. Schoen" <paul@peschoen.com>
wrote:

"Jon Kirwan" <jonk@infinitefactors.org> wrote in message
news:k372559tro8uoivdhhn3kraa792ldhrjjp@4ax.com...
On Sun, 05 Jul 2009 20:38:45 GMT, "Paul E. Schoen" <paul@peschoen.com
wrote:

These appear to 5% Carbon Film resistors.

Bingo.

That was one motivation I had. I wanted to see if the OP (or others,
as an after-thought) were reading at all. But there were at least two
other reasons I posted this link in this _rare_ case for me. I
haven't mentioned those, yet.

I did notice that the address for the OP is in the US, while the others are
in China. Yet I'm sure they all come from China one way or another. And the
OP's assortment seems to be a good value, although I do not like to
encourage NG spamming by making a purchase.

And who uses leaded parts anymore? Mouser has 1% thick film 0805
resistors,
1/8W, 100ppm, for $0.02 ea in 100 qty, and $0.01 ea in 1000 qty.

Hobbyists will probably want leaded parts for their frequent one-off
stuff. At least, I do.

I am probably spoiled because I have an infinite supply of surplus leaded
parts for any breadboard or deadbug projects I may want to do. But usually
I just use LTSpice to design and test simple linear circuits, and I rarely
feel the need or motivation to actually build any of them. Otherwise, I do
any digital stuff with PICs, and external analog stuff is usually pretty
simple.

I have a large supply of just a few parts, so I'm often in need of
soem specific value. I've too often faced using two or three parts to
make the one part I actually wanted. So an assortment of leaded
values is something I probably need to face getting, someday. I just
haven't been overly motivated to pay a lot for that, yet.

For anything that I might want to make in any quantity, I have become quite
comfortable with larger SMT parts such as 0805 and SOIC, and with PCB
prices being so cheap now, I can put a lot of circuitry on a small board
and I often add extra circuitry for variations and experimental use. A year
ago I avoided SMT; now it is my friend, and I have a good assortment of
parts.

I have only just recently started to learn how to do placements. I am
still struggling to find a good tool for free (I am not yet ready to
commit money... when I learn enough during this initial phase to know
what I think I want then I can then look for it in products that cost
money... but I'm definitely not there, yet.) I picked up Kicad and
FreePCB, got tangled up in Kicad too much to want to learn it, and
then found that I could make some headway with FreePCB... except that
I'm having to learn about making basic footprints that seem to be
missing. I wish there was a larger library. But I wish that for
LTSpice, too. So that's life in the free city, I guess. If you have
some thoughts you'd like to share on the CAD side of things, my ears
are very open right now.

(What I think I want is something where I don't have to make special
SOT23-6 footprints, for example. Where the common variations are all
present and readily labeled according to how the manufacturers state
their footprints in the datasheets so that I don't have to know too
much to find them and use them.)

One thing I've definitely learned the hard way is that I would like to
write a short calculator program (I found some on the web, too, like
PCB Matrix LP Calculator) for land patterns. I didn't find that free
program (well, kind of free, anyway) until I'd already sat down with
pencil and paper and worked out my own guesses about land patterns. I
felt proud (because there are some interesting twists of thought I had
to go through and get right) when I saw exactly the same numbers
computed by that program for a SOT23-6 I did for myself, beforehand.
But I do NOT like having to run that burdened program on slower
computers (or, to be honest, fast ones) and my electronics lab uses
old Pentium 100MHz computers with ISA bus (I have add in cards that
require it.) So start up and exit speed is of the essence. So I plan
to write some simple DOS thing to do the job for me. The calculations
required do NOT deserve all that extra crap. I just need a
specification language to feed a simple DOS program, write that up as
I read the datasheet's specs, and let the program just do the work,
quickly. If there is another language I can use to import them into a
CAD, that's great and I'll add it. Otherwise, I'll just hand edit, I
suppose, when the time comes using the figures showing on the screen.

I have zero experience buying boards. So that will be another hurdle.
So far, I use wire wrap for some things, dead bug wiring for others,
and small boards with plated holes for others (I don't much like
phenolic boards with no metal at all -- everything wobbles too much.)

Jon

 

[Jon Kirwan]

On Sun, 05 Jul 2009 22:19:24 GMT, "Paul E. Schoen" <paul@peschoen.com>
wrote:

snip
For anything that I might want to make in any quantity, I have become quite
comfortable with larger SMT parts such as 0805 and SOIC,
snip

Oh, and I've learned to HATE the size of 0805 -- they are HUGE on the
layout board! Monsters. Look like they take up the whole board by
themselves. I think I'm liking 0402 as about the right compromise.
(Not that I can solder those things.)

Jon

 

[Baron]

Jon Kirwan wrote:

A year ago I avoided SMT; now it is my friend, and I
have a good assortment of parts.

I have only just recently started to learn how to do placements. I am
still struggling to find a good tool for free

Jon

I guess you have tried "Eagle" from Cadsoft ?

--
Best Regards:
Baron.

 

[Baron]

Jon Kirwan wrote:

On Sun, 05 Jul 2009 22:19:24 GMT, "Paul E. Schoen" <paul@peschoen.com
wrote:

snip
For anything that I might want to make in any quantity, I have become
quite comfortable with larger SMT parts such as 0805 and SOIC,
snip

Oh, and I've learned to HATE the size of 0805 -- they are HUGE on the
layout board! Monsters. Look like they take up the whole board by
themselves. I think I'm liking 0402 as about the right compromise.
(Not that I can solder those things.)

Jon

I'll stick to 0805 as the smallest size for manual handling ! Anyway
its easy to run a track under one, without creating a short, darn near
impossible for 0402.

Also some pcb manufacturers wont/cant run tracks much narrower than
5thou.

--
Best Regards:
Baron.

 

[Jon Kirwan]

On Mon, 06 Jul 2009 12:25:06 +0100, Baron
<baron.nospam@linuxmaniac.nospam.net> wrote:

Jon Kirwan wrote:

On Sun, 05 Jul 2009 22:19:24 GMT, "Paul E. Schoen" <paul@peschoen.com
wrote:

snip
For anything that I might want to make in any quantity, I have become
quite comfortable with larger SMT parts such as 0805 and SOIC,
snip

Oh, and I've learned to HATE the size of 0805 -- they are HUGE on the
layout board! Monsters. Look like they take up the whole board by
themselves. I think I'm liking 0402 as about the right compromise.
(Not that I can solder those things.)

Jon

I'll stick to 0805 as the smallest size for manual handling ! Anyway
its easy to run a track under one, without creating a short, darn near
impossible for 0402.

Hmm. I hadn't considered the idea of track underneath. That's an
idea I'll play with.

Also some pcb manufacturers wont/cant run tracks much narrower than
5thou.

Got it.

Jon

 

[Jon Kirwan]

On Mon, 06 Jul 2009 12:19:22 +0100, Baron
<baron.nospam@linuxmaniac.nospam.net> wrote:

Jon Kirwan wrote:
A year ago I avoided SMT; now it is my friend, and I
have a good assortment of parts.

I have only just recently started to learn how to do placements. I am
still struggling to find a good tool for free

Jon

I guess you have tried "Eagle" from Cadsoft ?

I have. Some years ago. I recall there is a fee, if I want to do
anything much bigger than a size I'm likely to exceed at times. I
don't like the idea of investing my own time in something that I know
I'm going to have to pay a hundred (or two or more) dollars for,
unless I've already made the decision about it. The logic goes like
this: Assume I have already decided to budget up to X dollars for
layout software. I'd go out and study the various packages that fit
the criteria to see which gives the better value for my circumstances
and select it. That may, or may not, result in selecting Eagle. I
don't know. But if I start out on the free version, I'm stuck on the
path that forces the selection I might have otherwise made differently
because of all the time I've invested before. But that might not have
been the same choice I would have wanted to make, had I gone out at
the start and decided to spend money for a package. I might have
chosen something else, then. But I'm stuck, because I already spent
substantial time (worth a lot of money) on Eagle.

So I set it aside, this go-'round.

Jon

 

[Baron]

Jon Kirwan wrote:

On Mon, 06 Jul 2009 12:25:06 +0100, Baron
baron.nospam@linuxmaniac.nospam.net> wrote:

Jon Kirwan wrote:

On Sun, 05 Jul 2009 22:19:24 GMT, "Paul E. Schoen"
paul@peschoen.com> wrote:

snip
For anything that I might want to make in any quantity, I have
become quite comfortable with larger SMT parts such as 0805 and
SOIC, <snip

Oh, and I've learned to HATE the size of 0805 -- they are HUGE on
the
layout board! Monsters. Look like they take up the whole board by
themselves. I think I'm liking 0402 as about the right compromise.
(Not that I can solder those things.)

Jon

I'll stick to 0805 as the smallest size for manual handling ! Anyway
its easy to run a track under one, without creating a short, darn near
impossible for 0402.

Hmm. I hadn't considered the idea of track underneath. That's an
idea I'll play with.

Consider a zerohm ! Invariably its used to jump over a track. So far
I've not seen an 0402 one.

Also some pcb manufacturers wont/cant run tracks much narrower than
5thou.

Got it.

Jon

--
Best Regards:
Baron.

 

[Baron]

Jon Kirwan wrote:

On Mon, 06 Jul 2009 12:19:22 +0100, Baron
baron.nospam@linuxmaniac.nospam.net> wrote:

Jon Kirwan wrote:
A year ago I avoided SMT; now it is my friend, and I
have a good assortment of parts.

I have only just recently started to learn how to do placements. I
am still struggling to find a good tool for free

Jon

I guess you have tried "Eagle" from Cadsoft ?

I have. Some years ago. I recall there is a fee, if I want to do
anything much bigger than a size I'm likely to exceed at times. I
don't like the idea of investing my own time in something that I know
I'm going to have to pay a hundred (or two or more) dollars for,
unless I've already made the decision about it. The logic goes like
this: Assume I have already decided to budget up to X dollars for
layout software. I'd go out and study the various packages that fit
the criteria to see which gives the better value for my circumstances
and select it. That may, or may not, result in selecting Eagle. I
don't know. But if I start out on the free version, I'm stuck on the
path that forces the selection I might have otherwise made differently
because of all the time I've invested before. But that might not have
been the same choice I would have wanted to make, had I gone out at
the start and decided to spend money for a package. I might have
chosen something else, then. But I'm stuck, because I already spent
substantial time (worth a lot of money) on Eagle.

So I set it aside, this go-'round.

Jon

I compleatly understand your point of view ! Having used various PCB
CAD packages over the years, mostly paid for by other people and like
you not wanting to lock myself in. Eagle was suggested to me.

I must admit that when I first had a play around with it (Version 3.x) I
absolutely couldn't get on with it. So I then had a thrutch with GEDA.
Whilst I did seem to get on better, I quickly realised that GEDA was way
overkill for the sort of general work that I wanted to play with. By
this time Eagle V4.x was being replaced by V5 and is now at V5.6. I
still find some things a little difficult, but the libraries and the
online support are absolutely unbeatable.

--
Best Regards:
Baron.

 

[Jon Kirwan]

On Mon, 06 Jul 2009 20:01:04 +0100, Baron
<baron.nospam@linuxmaniac.nospam.net> wrote:

Jon Kirwan wrote:

On Mon, 06 Jul 2009 12:19:22 +0100, Baron
baron.nospam@linuxmaniac.nospam.net> wrote:

Jon Kirwan wrote:
A year ago I avoided SMT; now it is my friend, and I
have a good assortment of parts.

I have only just recently started to learn how to do placements. I
am still struggling to find a good tool for free

Jon

I guess you have tried "Eagle" from Cadsoft ?

I have. Some years ago. I recall there is a fee, if I want to do
anything much bigger than a size I'm likely to exceed at times. I
don't like the idea of investing my own time in something that I know
I'm going to have to pay a hundred (or two or more) dollars for,
unless I've already made the decision about it. The logic goes like
this: Assume I have already decided to budget up to X dollars for
layout software. I'd go out and study the various packages that fit
the criteria to see which gives the better value for my circumstances
and select it. That may, or may not, result in selecting Eagle. I
don't know. But if I start out on the free version, I'm stuck on the
path that forces the selection I might have otherwise made differently
because of all the time I've invested before. But that might not have
been the same choice I would have wanted to make, had I gone out at
the start and decided to spend money for a package. I might have
chosen something else, then. But I'm stuck, because I already spent
substantial time (worth a lot of money) on Eagle.

So I set it aside, this go-'round.

Jon

I compleatly understand your point of view ! Having used various PCB
CAD packages over the years, mostly paid for by other people and like
you not wanting to lock myself in. Eagle was suggested to me.

I must admit that when I first had a play around with it (Version 3.x) I
absolutely couldn't get on with it. So I then had a thrutch with GEDA.
Whilst I did seem to get on better, I quickly realised that GEDA was way
overkill for the sort of general work that I wanted to play with. By
this time Eagle V4.x was being replaced by V5 and is now at V5.6. I
still find some things a little difficult, but the libraries and the
online support are absolutely unbeatable.

Well, that is a recommendation, then!

Jon

 

[Paul E. Schoen]

"Jon Kirwan" <jonk@infinitefactors.org> wrote in message
news:sgc255la5p0eoi1q86ha06t2nqp0c7nb9d@4ax.com...

On Sun, 05 Jul 2009 22:19:24 GMT, "Paul E. Schoen" <paul@peschoen.com
wrote:

I am probably spoiled because I have an infinite supply of surplus leaded
parts for any breadboard or deadbug projects I may want to do. But
usually
I just use LTSpice to design and test simple linear circuits, and I
rarely
feel the need or motivation to actually build any of them. Otherwise, I
do
any digital stuff with PICs, and external analog stuff is usually pretty
simple.

I have a large supply of just a few parts, so I'm often in need of
soem specific value. I've too often faced using two or three parts to
make the one part I actually wanted. So an assortment of leaded
values is something I probably need to face getting, someday. I just
haven't been overly motivated to pay a lot for that, yet.

Well, either of these assortments seem like a pretty good bargain. Carbon
film is OK for lots of things.

For anything that I might want to make in any quantity, I have become
quite
comfortable with larger SMT parts such as 0805 and SOIC, and with PCB
prices being so cheap now, I can put a lot of circuitry on a small board
and I often add extra circuitry for variations and experimental use. A
year
ago I avoided SMT; now it is my friend, and I have a good assortment of
parts.

I have only just recently started to learn how to do placements. I am
still struggling to find a good tool for free (I am not yet ready to
commit money... when I learn enough during this initial phase to know
what I think I want then I can then look for it in products that cost
money... but I'm definitely not there, yet.) I picked up Kicad and
FreePCB, got tangled up in Kicad too much to want to learn it, and
then found that I could make some headway with FreePCB... except that
I'm having to learn about making basic footprints that seem to be
missing. I wish there was a larger library. But I wish that for
LTSpice, too. So that's life in the free city, I guess. If you have
some thoughts you'd like to share on the CAD side of things, my ears
are very open right now.

I am using PADS2004sp2 which is a lot more than I really need, but I got it
from another company that had switched to Protel and I got a good deal. You
can download the demo version from www.mentor.com, but it is limited to
rather small projects.

I tried Eagle a long time ago and found it difficult to use for my
purposes. Same with Kicad. I use the schematic editor a lot for non-PCB
circuits and most packages concentrate on the PCB module. I have also tried
TINA, which is a simulator available free from www.ti.com, and from
www.tina.com you can get a PCB module that works with their schematics as
used in the simulator. They have a low-cost option, but probably $100 or
more. I only use the simulator once in a while. It has good interactive
components like pushbuttons, lights, and LED displays.

(What I think I want is something where I don't have to make special
SOT23-6 footprints, for example. Where the common variations are all
present and readily labeled according to how the manufacturers state
their footprints in the datasheets so that I don't have to know too
much to find them and use them.)

One thing I've definitely learned the hard way is that I would like to
write a short calculator program (I found some on the web, too, like
PCB Matrix LP Calculator) for land patterns. I didn't find that free
program (well, kind of free, anyway) until I'd already sat down with
pencil and paper and worked out my own guesses about land patterns. I
felt proud (because there are some interesting twists of thought I had
to go through and get right) when I saw exactly the same numbers
computed by that program for a SOT23-6 I did for myself, beforehand.
But I do NOT like having to run that burdened program on slower
computers (or, to be honest, fast ones) and my electronics lab uses
old Pentium 100MHz computers with ISA bus (I have add in cards that
require it.) So start up and exit speed is of the essence. So I plan
to write some simple DOS thing to do the job for me. The calculations
required do NOT deserve all that extra crap. I just need a
specification language to feed a simple DOS program, write that up as
I read the datasheet's specs, and let the program just do the work,
quickly. If there is another language I can use to import them into a
CAD, that's great and I'll add it. Otherwise, I'll just hand edit, I
suppose, when the time comes using the figures showing on the screen.

I have zero experience buying boards. So that will be another hurdle.
So far, I use wire wrap for some things, dead bug wiring for others,
and small boards with plated holes for others (I don't much like
phenolic boards with no metal at all -- everything wobbles too much.)

I like www.pcbfabexpress.com. You can get a 100 sq in PCB for about $40 for
a single piece and about $15 each for quantity 5. Double sided with
silkscreen and soldermask, in about 5 days. And they have a bare-bones
special even cheaper.

Paul

 

[Zeke]

"Jon Kirwan" <jonk@infinitefactors.org> wrote in message
news:vhp05590br3sba00floecrlhk41gve67l0@4ax.com...

On Sun, 05 Jul 2009 01:56:19 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

Jon Kirwan wrote:

On Sat, 4 Jul 2009 20:10:29 -0700 (PDT), engeecorp
lathi.tan@gmail.com> wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300320789926

This seller does it cheaper:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110408254551

Even at the full "buy it now" price of $12.99, it comes to only $16.23
for 2500, not $18.69. They also not only make the same claim about
metal film, but include a nice chart. Of course, the only way to tell
is to buy and test.

Jon

Why would you want to buy from a Chinese spammer?

What makes you imagine that was my motive?

Jon

Micheal Terrell is a piece of shit. He imagines everything, no wonder why
the country went to the bottom, because he support his dickhead president
B=Bullshit.

 

[John Larkin]

On Sun, 05 Jul 2009 01:56:19 -0400, "Michael A. Terrell"
<mike.terrell@earthlink.net> wrote:

Jon Kirwan wrote:

On Sat, 4 Jul 2009 20:10:29 -0700 (PDT), engeecorp
lathi.tan@gmail.com> wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300320789926

This seller does it cheaper:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110408254551

Even at the full "buy it now" price of $12.99, it comes to only $16.23
for 2500, not $18.69. They also not only make the same claim about
metal film, but include a nice chart. Of course, the only way to tell
is to buy and test.

Jon


Why would you want to buy from a Chinese spammer?

The best response to spammers is to post followups declaring them to
be thieves, or to sell crap, or anything else that discourages them
from posting here.

John

 

[John Larkin]

Warning! Crap parts! Paypal scam!

John




On Sat, 4 Jul 2009 20:10:29 -0700 (PDT), engeecorp
<lathi.tan@gmail.com> wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300320789926

This is a kit of 2500 1/4W metal film resistors as listed below. They
are all bagged and labeled. The tolerance is 1%. 50 components of each
value. These resistors are genuine ROHS.
These are true metal film resistors. We caution the customers to
differentiate true metal film resistors from fake metal film resistors
and carbon film resistors. The metal film resistors have excellent
temperature stability. You can tell this by putting an iron close to
the resistor and measure with multimeter. The metal film resistors do
not change drastically while the fake ones do.

The pin material is copper, covered with zink, with ~0.5mm diameter.
Exact datasheet is available on request.


1 ohm 7.5 ohm 10 ohm 22 ohm 39 ohm
47 ohm 68 ohm 75 ohm 100 ohm 130ohm
150 ohm 220 ohm 360 ohm 470 ohm 680 ohm
1 kohm 1.3 kohm 1.8 kohm 2.2 kohm 3 kohm
3.6 kohm 3.9 kohm 4.7 kohm 5.6 kohm 6.8 kohm
8.2 kohm 10 kohm 12 kohm 22 kohm 33 kohm
39 kohm 47 kohm 56 kohm 68 kohm 100 kohm
130 kohm 150 kohm 180 kohm 220 kohm 270 kohm
330 kohm 390 kohm 470 kohm 560 kohm 680 kohm
1 Mohm 2.7 Mohm 3.3 Mohm 4.7 Mohm 10 Mohm