Any not-very-expensive SOIC to DIP adapters

[Norm Dresner]

I'd like to create a circuit for which I seem to only be able to get a
16-pin SOIC package. Since everything else I do is DIP-based, it seems that
what I'd want is an adapter -- ideally a socket so I don't have to do any
SIOC soldering. I think I found one but it's in the $70-130 range *each*.
I also found snap-apart PC board material with SIOC & DIP patterns which
would do much the same thing -- but with a humongous number of patterns on
one sheet considering that I need exactly one. Again it's much too
expensive.

Okay, I could make my own PC board -- I've done that too -- but it's a pain
in the butt for a piece of one-off instrumentation.

Do I have any other alternatives?

TIA
Norm

 

[nospam]

"Norm Dresner" <ndrez@att.net> wrote:

I'd like to create a circuit for which I seem to only be able to get a
16-pin SOIC package. Since everything else I do is DIP-based, it seems that
what I'd want is an adapter -- ideally a socket so I don't have to do any
SIOC soldering.

Tack 16 wires on the SOIC and mount it in a 16 pin DIL header. Pot it or
cover it with hot melt glue to make it more robust.

 

[Rich Webb]

On Tue, 05 Oct 2004 21:25:32 +0100, nospam <nospam@nospam.invalid>
wrote:

"Norm Dresner" <ndrez@att.net> wrote:

I'd like to create a circuit for which I seem to only be able to get a
16-pin SOIC package. Since everything else I do is DIP-based, it seems that
what I'd want is an adapter -- ideally a socket so I don't have to do any
SIOC soldering.

Tack 16 wires on the SOIC and mount it in a 16 pin DIL header. Pot it or
cover it with hot melt glue to make it more robust.

Or do it "dead bug" by gluing the SOIC to the board upside-down and
soldering, say, AWG 30 the legs to the pads.

--
Rich Webb Norfolk, VA

 

[Terran Melconian]

In article <JmC8d.492391$OB3.221474@bgtnsc05-news.ops.worldnet.att.net>,
Norm Dresner <ndrez@att.net> wrote:

I'd like to create a circuit for which I seem to only be able to get a
16-pin SOIC package. Since everything else I do is DIP-based, it seems that
what I'd want is an adapter -- ideally a socket so I don't have to do any
SIOC soldering. I think I found one but it's in the $70-130 range *each*.

If you want cheap, you'll need to pass on the socket part. Sockets
for surface-mount parts simply aren't cheap. For one thing, unlike DIP
sockets, they're used only for prototyping and not for production, so
the volumes aren't there; for another, they're more complex to make
because the shape of the leads is not obliging.

Accept that you're going to have to solder to fit within the budget and
have a look at things like these:

http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=278632&Row=189251&Site=US
http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=277041&e_categoryid=608&e_pcodeid=53500
http://www.epboard.com/eproducts/protoadapter.htm

 

[Nicholas O. Lindan]

"Tim Shoppa" <shoppa@trailing-edge.com> wrote

Dead-bug style construction with SOIC's is perfectly feasible. After all
the lead spacing is only 0.050 inches, which is just the same as a TO-92,
and you do those all the time, right?

If you are terminally myopic and have not a caffeinated neuron in your body:

http://elm-chan.org/docs/wire/wiring_e.html

If you are of the Tri-Focal generation a trick is to bend the leads alternately
up and down. Glue the dead-bug to a berg jumper (one of those rectangular
things
for fitting on pins "1-2 for master drive, 3-4 for ...") and glue the berg
jumper
to the board: this gives you extra working room when attaching the wires,
reducing
solder bridges.

Use epoxy for gluing, some cyanoacrylates (like the ones in my tool box) will
put a hazy coating all over everything and making for hard soldering.

Me:

o I use stripped 30Ga ww wire.
o Wire to the board first, then to the IC pin - works as a 3rd hand for the
wire
o A #1 watchmaker's tweezer is a great help
o I mount the wee beasty on a dip header, making it easy for re-use. Mark the
IC's p/n on the bottom of the header.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com
psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

 

[Rich Webb]

On Wed, 06 Oct 2004 19:04:09 GMT, "Nicholas O. Lindan" <see@sig.com>
wrote:

"Tim Shoppa" <shoppa@trailing-edge.com> wrote

Dead-bug style construction with SOIC's is perfectly feasible. After all
the lead spacing is only 0.050 inches, which is just the same as a TO-92,
and you do those all the time, right?

If you are terminally myopic and have not a caffeinated neuron in your body:

http://elm-chan.org/docs/wire/wiring_e.html

Wow... those are lovely.

--
Rich Webb Norfolk, VA

 

[Clarence]

"Rich Webb" <bbew.ar@mapson.nozirev.ten> wrote in message
news:nb39m090c2ut5o8q76gojj3s4p5a11aob0@4ax.com...

On Wed, 06 Oct 2004 19:04:09 GMT, "Nicholas O. Lindan" <see@sig.com
wrote:

"Tim Shoppa" <shoppa@trailing-edge.com> wrote

Dead-bug style construction with SOIC's is perfectly feasible. After all
the lead spacing is only 0.050 inches, which is just the same as a TO-92,
and you do those all the time, right?

If you are terminally myopic and have not a caffeinated neuron in your body:
http://elm-chan.org/docs/wire/wiring_e.html

Wow... those are lovely.
--
Rich Webb Norfolk, VA

Vero Corp used to sell wiring pens. I got two I use for different size wire.
The tip is a problem though, and I like the idea of putting a drafting pen tip
on the barrel. You can't get the little wire combs anymore, so I use 4lb.
Monofilament fishing line to "stitch" the wires on the board when I am done
wiring and testing.

Had to get used to using a magnifying lamp a lot. Easier than the microscope I
use for SMT components on a PCB.

 

[James T. White]

"Nicholas O. Lindan" <see@sig.com> wrote in message
news:JkX8d.10093$gs1.9072@newsread2.news.atl.earthlink.net...

"Tim Shoppa" <shoppa@trailing-edge.com> wrote

If you are terminally myopic and have not a caffeinated neuron in your body:

http://elm-chan.org/docs/wire/wiring_e.html

Excellent work. Did you have any problems with crosstalk since you bundled the
wires so closely?

--
James T. White

 

[Nicholas O. Lindan]

"James T. White" <SPAMjtwhiteGUARD@SPAMhal-pcGUARD.org> wrote

http://elm-chan.org/docs/wire/wiring_e.html
Excellent work. Did you have any problems with crosstalk since you bundled
the
wires so closely?

Not my work. It's the work of Mr. Chan (?):

http://elm-chan.org/

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com
psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

 

[bob hoffman]

"Norm Dresner" <ndrez@att.net> wrote in
news:JmC8d.492391$OB3.221474@bgtnsc05-news.ops.worldnet.att.net:

I'd like to create a circuit for which I seem to only be able to get a
16-pin SOIC package. Since everything else I do is DIP-based, it
seems that what I'd want is an adapter -- ideally a socket so I don't
have to do any SIOC soldering. I think I found one but it's in the
$70-130 range *each*. I also found snap-apart PC board material with
SIOC & DIP patterns which would do much the same thing -- but with a
humongous number of patterns on one sheet considering that I need
exactly one. Again it's much too expensive.

Okay, I could make my own PC board -- I've done that too -- but it's a
pain in the butt for a piece of one-off instrumentation.

Do I have any other alternatives?

TIA
Norm

Aries has a line that go for $6 or $7 each. Digikey is one distributor
that has them.