Homebrew PCBs

What are you folks using
for via inserts on homebrew
double sided boards?

I had some Mill-Max
http://www.mill-max.com
0566-2-15-15-21-14-10-0
or
0566-2-15-15-21-27-10-0
pins that worked quite
well but I have run out.

These are tiny gold plated
hollow pins with 0.039"od
and accept wires from
.015-.021".  They are  .138"
long so they stick out
of the back of the board
and make it easy to 
solder to.  On the top
of the board there
is a nice lip on the pin, but
you have to be careful
when you solder to the
top lip so that the solder
does not wick into the
hole.  Note that there
a lot of other variations
of the basic variations
of the 0566-2 part that
have to do with the
coating (gold or tin).
I guess all of them would
do the job.  

http://www.findchips.com
search on "0566" shows that 
Digikey has them as a non stock item
requiring a 1000 purchase
for about $100.  That would
last me a lifetime.

Anyone else have a better
source, or a better or cheaper
via insert?

Dave
The Inexpensive Seismometer Project
http://www.infiltec.com/seismo/

If you go to www.farnell.com you will find a similar item in their catalogue.

Regards,

Terry

  ----- Original Message ----- 
  From: David Saum 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Wednesday, December 11, 2002 4:24 PM
  Subject: [Homebrew_PCBs] via inserts?


  What are you folks using
  for via inserts on homebrew
  double sided boards?

  I had some Mill-Max
  http://www.mill-max.com
  0566-2-15-15-21-14-10-0
  or
  0566-2-15-15-21-27-10-0
  pins that worked quite
  well but I have run out.

  These are tiny gold plated
  hollow pins with 0.039"od
  and accept wires from
  .015-.021".  They are  .138"
  long so they stick out
  of the back of the board
  and make it easy to 
  solder to.  On the top
  of the board there
  is a nice lip on the pin, but
  you have to be careful
  when you solder to the
  top lip so that the solder
  does not wick into the
  hole.  Note that there
  a lot of other variations
  of the basic variations
  of the 0566-2 part that
  have to do with the
  coating (gold or tin).
  I guess all of them would
  do the job.  

  http://www.findchips.com
  search on "0566" shows that 
  Digikey has them as a non stock item
  requiring a 1000 purchase
  for about $100.  That would
  last me a lifetime.

  Anyone else have a better
  source, or a better or cheaper
  via insert?

  Dave
  The Inexpensive Seismometer Project
  http://www.infiltec.com/seismo/


  Be sure to visit the group home and check for new Bookmarks and files:
  http://groups.yahoo.com/group/Homebrew_PCBs

  To unsubscribe from this group, send an email to:
  Homebrew_PCBs-unsubscribe@yahoogroups.com



  Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. 


[Non-text portions of this message have been removed]

David Saum wrote:
> What are you folks using
> for via inserts on homebrew
> double sided boards?

Rivets are just too big and tedious. I just solder leaded
components on both sides whenever i need to.

In a message dated 12/11/2002 11:04:05 AM Central Standard Time, 
dsaum@infiltec.com writes:


> http://www.findchips.com search on "0566" shows that  Digikey has them as a 
> non stock item requiring a 1000 purchase for about $100.  That would last 
> me a lifetime.<<

Perhaps for the individual who does relatively LITTLE double-sided PCB work!  
I had bought 1K of some PERFECT gold-plated eyelets from a local "surplus 
house" (they don't carry them normally), and they were all used up in two or 
three years!  The TIN-plated ones they had next time I inquired require a 
1/16" dia hole, so are kinda useless for under an IC, though they ARE the 
right length for a 1/16" board (what, 0.08" long?).  
> 
> Anyone else have a better source, or a better or cheaper via insert?<<

What is the name of the outfit?  International Eylets?  I lost the sample-ad, 
as THEIR minimum was over $50, too.  

Which reminds me!  $100 for only 1K eylets?  That's 10¢ each!  OUTRAGEOUS!  
Should be no more than $10 for 1K!

Jan Rowland





[Non-text portions of this message have been removed]

In a message dated 12/11/2002 7:04:02 PM Central Standard Time, 
wotisname@... writes:


> If you go to www.farnell.com you will find a similar item in their catalogue

Terry!  WENT there, but see only many flags and Farnell adddresses (contacts) 
in many countries.  NO catalog, nor anything to "click on" except far, far 
away e-mail addresses!

Jan Rowland,  confused old Yank


[Non-text portions of this message have been removed]

In a message dated 12/11/2002 9:37:39 PM Central Standard Time, 
rjshaw@... writes:


> Rivets are just too big and tedious. I just solder leaded
> components on both sides whenever i need to.
> 
> 

Yes, as do we, as well!  But what do you do "under an IC-socket"???  Eyelets 
are virtually indispensable for that!  Or, say, a TO-5 "down against the 
board", etc.

Jan Rowland


[Non-text portions of this message have been removed]

JanRwl@... wrote:
> In a message dated 12/11/2002 9:37:39 PM Central Standard Time, 
> rjshaw@... writes:
> 
>>Rivets are just too big and tedious. I just solder leaded
>>components on both sides whenever i need to.
>>
> Yes, as do we, as well!  But what do you do "under an IC-socket"???  Eyelets 
> are virtually indispensable for that!  Or, say, a TO-5 "down against the 
> board", etc.

I solder a piece of 0.1mm enamelled magnet wire onto the pad and
thru the hole. The solder bump can be made low enough to fit under
smd ICs. The enamel is first melted off by tinning the wire.

For doing vias where there's no component lead, i thread and solder
stripped wire-wrap wire. It's a bit easier if you hold the pcb vertically
(edge-on) in a small vice thing with alligator clips. Small side-cutters
with a flat cutting face makes cuts closer to the surface easier.

Click on the flag for your country. It will then take you to the catalogue.

Les

----- Original Message -----
From: <JanRwl@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, December 12, 2002 4:19 AM
Subject: Re: [Homebrew_PCBs] via inserts?


> In a message dated 12/11/2002 7:04:02 PM Central Standard Time,
> wotisname@... writes:
>
>
> > If you go to www.farnell.com you will find a similar item in their
catalogue
>
> Terry!  WENT there, but see only many flags and Farnell adddresses
(contacts)

> in many countries.  NO catalog, nor anything to "click on" except far, far
> away e-mail addresses!
>
> Jan Rowland,  confused old Yank
>
>
> [Non-text portions of this message have been removed]
>
>
> Be sure to visit the group home and check for new Bookmarks and files:
> http://groups.yahoo.com/group/Homebrew_PCBs
>
> To unsubscribe from this group, send an email to:
> Homebrew_PCBs-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

Hi Jan,

I know what you mean about the Farnell website, sometimes I wonder if the do them that way to chase away business. There is nothing that will annoy me quicker than a website that does nothing of is impossible to find my way around.

Anyway It appears I have mislead you. Farnell don't do the push in "Through Plated Holes" that come out like a pencil lead and break off. They do a kit catalogue # 452-071 @ £89.34 which does the job in five stages:

1) Drill the hole.

2) Install the ball.

3) Punch.

4) Solder.

5) Desolder.

It does a very professional job and there is enough in the kit to do 500 0.8, 1.0 and 1.2 mm holes. They also have the packs of refill balls.

The thing you were looking for is available from www.maplin.co.uk catalogue # FL82D. These are available @ £1.29 and come in packs of 50. These are for vias and are not Through Hole Plating but pins.

I have seen, in my many catalogues, Through Holes which can be dispensed with a propelling pencil and broken off in the board. These are Through Hole Plating. I will try and find them and post the results.

Sorry for the confusion but I could fill a room with the number of catalogues I have and most of them are only good for door stops.

Regards,

Terry

  > If you go to www.farnell.com you will find a similar item in their catalogue

  Terry!  WENT there, but see only many flags and Farnell adddresses (contacts) 
  in many countries.  NO catalog, nor anything to "click on" except far, far 
  away e-mail addresses!

  Jan Rowland,  confused old Yank


[Non-text portions of this message have been removed]

At 11:33 PM 12/11/02 -0500, JanRwl@... wrote:
>In a message dated 12/11/2002 9:37:39 PM Central Standard Time,
>rjshaw@... writes:
>
>
> > Rivets are just too big and tedious. I just solder leaded
> > components on both sides whenever i need to.
> >
> >
>
>Yes, as do we, as well!  But what do you do "under an IC-socket"???

I use machined pin sockets for those - the pins extend out the bottom of 
the socket and allow easy soldering of the top-side traces.  Sockets 
manufactured by Augat and Asman (SP?) work well.

>  Eyelets are virtually indispensable for that!  Or, say, a TO-5 "down 
> against the
>board", etc.

TO-5 transistors are usually stood off the board by about 1/4" anyways - no 
problem there either.

The problem components are radial-lead electrolytic capacitors and terminal 
blocks.  Most everything else is not too much problem.

dwayne

--
Dwayne Reid   <dwayner@...>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax

Celebrating 18 years of Engineering Innovation (1984 - 2002)
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This message neither grants consent to receive unsolicited
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In a message dated 12/12/2002 4:50:56 AM Central Standard Time, 
wotisname@... writes:


> Sorry for the confusion but I could fill a room with the number of 
> catalogues I have and most of them are only good for door stops.
> 

NO need to apologize!  KNOW whatcha mean about door-stops!    Trouble is, if 
you even just GLANCED through each one you throw in the ash bin, 72 hours 
after that's carted away, you will realize you NEED something "you saw" in 
there!

Jan Rowland


[Non-text portions of this message have been removed]

In a message dated 12/12/2002 5:15:29 AM Central Standard Time, 
les@... writes:


> Click on the flag for your country. It will then take you to the catalogue.
> 

Yes, Les, it seems logical that it should, but it doesn't!  Perhaps due to 
the difference between SECAM, NTSC, and PAL, and fact the Euro is not 
EXACT-par to $?   (LOL!)


[Non-text portions of this message have been removed]