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OT - SMT breadboarding

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alsopb

OT - SMT breadboarding

Just how does one breadboard something with IC SMT parts having 0.025"
(or other similarly small) lead spacing? I have a few projects here
that require this.

I was just thinking of gluing the chip dead bug fashion to the
breadboard and soldering tiny wires to the leads.

The problem is that the IC's for any given project tend to have
differing numbers of pins and pin spacings. No one size "adapter" would
most likely be useful.

There must be a better way.

73 de Brian/K3KO

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Joe Planisky

Re: OT - SMT breadboarding

Depending on your needs and budget, something like these might work.

http://www.beldynsys.com/singledual.htm

True, there's no one-size-fits-all solution, but something like the P502 would give you a variety of patterns.

I believe Mouser and Jameco stock their products.

73
--
Joe KB8AP

On Jan 6, 2011, at 10:32 AM, Brian Alsop wrote:

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Mel

Re: OT - SMT breadboarding

In reply to this post by alsopb

Yes, dead bug fashion is the standard way, however, I always use a good SMT
single chip prototype PCB rather than tying the leads directly to the chip.
One, the PCB is much more tolerant to stress and Two, the part can easily be
replaced without messing up the rest of the circuit. Several of the electronic
hobby catalogs list them. I usually buy an assortment to have them on hand.

Mel, K6KBE

________________________________
From: Brian Alsop <[hidden email]>
To: [hidden email]
Sent: Thu, January 6, 2011 10:32:09 AM
Subject: [Elecraft] OT - SMT breadboarding

Just how does one breadboard something with IC SMT parts having 0.025"
(or other similarly small) lead spacing? I have a few projects here
that require this.

I was just thinking of gluing the chip dead bug fashion to the
breadboard and soldering tiny wires to the leads.

The problem is that the IC's for any given project tend to have
differing numbers of pins and pin spacings. No one size "adapter" would
most likely be useful.

There must be a better way.

73 de Brian/K3KO

-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1191 / Virus Database: 1435/3363 - Release Date: 01/06/11

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Jack Smith-6

Re: OT - SMT breadboarding

In reply to this post by alsopb

BPS makes a small grid prototype board that will mount a variety of SMT
parts - one board accommodates different size parts.

http://www.busboard.us/pdfs/BPS-MAR-SP3UT-001.pdf

Mouser carries it, and I imagine DigiKey and others as well.

It's tedious to use, but what isn't when prototyping with small SMT parts.

Jack K8ZOA

On 1/6/2011 1:32 PM, Brian Alsop wrote:

> Just how does one breadboard something with IC SMT parts having 0.025"
> (or other similarly small) lead spacing? I have a few projects here
> that require this.
>
> I was just thinking of gluing the chip dead bug fashion to the
> breadboard and soldering tiny wires to the leads.
>
> The problem is that the IC's for any given project tend to have
> differing numbers of pins and pin spacings. No one size "adapter" would
> most likely be useful.
>
> There must be a better way.
>
> 73 de Brian/K3KO
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1191 / Virus Database: 1435/3363 - Release Date: 01/06/11
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

Kok Chen

Re: OT - SMT breadboarding

In reply to this post by alsopb

On Jan 6, 2011, at 1/6 10:32 AM, Brian Alsop wrote:

> Just how does one breadboard something with IC SMT parts having 0.025"
> (or other similarly small) lead spacing? I have a few projects here
> that require this.

I am not sure they have precisely what you are looking for, but
Sparkfun has many breakout boards.

http://www.sparkfun.com/categories/20

Go to the end of page 2 of the above and there are some SOIC (1.27mm
pitch) and SSOP (0.635mm pitch) to DIP adapters. I think the SSOP to
DIP might fit your needs? If so, they have 8, 16, 20 and 28 pin SSOP
breakout boards/DIP adapters.

I have no connection with them, but I have bought all sorts of stuff
from them in past years, from FTDI breakout boards to shaft encoders
to AVR microprocessor kits. Good vendor. (They also have a low-
quantity PC board making service if you search though their web site.)

73
Chen, W7AY

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Don Wilhelm-4

Re: OT - SMT breadboarding

In reply to this post by alsopb

Brian,

Have you investigated "Manhatten construction" That is adaptable to SMT
parts. Yes, the IC is usually mounted "dead-bug" fashion. If you bend
the leads in or out so that alternate leads are bent in and the otheer
out, you have double the "error distance" when soldering.

73,
Don W3FPR

On 1/6/2011 1:32 PM, Brian Alsop wrote:

alsopb

OT - SMT breadboarding -tnx

In reply to this post by Kok Chen

Guys,

Thanks for the tips.

While I did first do the dead bug approach on the 3x3mm IC, I'm afraid
to breath on the board for fear that a connection will be lost.

Looking over the SPARK FUN stuff, I was able to find a breakout board
for a wider chip that allows half (one side) of the pins to be soldered
to the board. That will be OK since I need only a single pin from the
opposite side.

Definitely not tube construction practice where one could have 20/200
vision and be a mechanical klutz.

73 de Brian/K3KO

On 1/6/2011 19:24, Kok Chen wrote:

>
> On Jan 6, 2011, at 1/6 10:32 AM, Brian Alsop wrote:
>
>> Just how does one breadboard something with IC SMT parts having 0.025"
>> (or other similarly small) lead spacing? I have a few projects here
>> that require this.
>
> I am not sure they have precisely what you are looking for, but Sparkfun
> has many breakout boards.
>
> http://www.sparkfun.com/categories/20
>
> Go to the end of page 2 of the above and there are some SOIC (1.27mm
> pitch) and SSOP (0.635mm pitch) to DIP adapters. I think the SSOP to DIP
> might fit your needs? If so, they have 8, 16, 20 and 28 pin SSOP
> breakout boards/DIP adapters.
>
> I have no connection with them, but I have bought all sorts of stuff
> from them in past years, from FTDI breakout boards to shaft encoders to
> AVR microprocessor kits. Good vendor. (They also have a low-quantity PC
> board making service if you search though their web site.)
>
> 73
> Chen, W7AY
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1191 / Virus Database: 1435/3363 - Release Date: 01/06/11
>
>

-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1191 / Virus Database: 1435/3365 - Release Date: 01/07/11

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gm3sek

Re: OT - SMT breadboarding

In reply to this post by Jack Smith-6

Jack Smith wrote:
>BPS makes a small grid prototype board that will mount a variety of SMT
>parts - one board accommodates different size parts.
>
>http://www.busboard.us/pdfs/BPS-MAR-SP3UT-001.pdf
>

A small British company is now making RF prototyping boards that have
square pads on a 0.1in grid, with a continuous copper groundplane on the
reverse. Every pad has an unplated hole drilled through to the
groundplane, which allows good RF grounding.

The board is very versatile because you can mix and match various styles
of construction on the two different sides.

The groundplane side can be treated as continuous copper for dead-bug
and 'ugly' styles of construction, but the pre-drilled holes make it
very easy to connect through to the pad-style wiring on the other side.
To make insulated lead-throughs, simply remove the copper around the
selected holes.

On the pad side, the 0.1in grid is suitable for conventional wire-leaded
devices and DIL ICs, along with many of the larger SMD packages.
Smaller-pitch devices can be soldered dead-bug style on either side of
the board - whichever way works better for that particular part of the
circuit.

<http://cgi.ebay.co.uk/RF-Matrix-PadBoard-149x114x1-6-Prototype-Circuit-B
oard-/170586485860>

--

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek
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M0XDF

Re: OT - SMT breadboarding

I have 2 of these boards and they are as described and very useful.
73 de M0XDF, K3 #174, P3 #108
--
Arguing with an engineer is like wrestling with a pig in the mud,
after a while you realize you are muddy and the pig is enjoying it.

On 7 Jan 2011, at 20:13, Ian White GM3SEK wrote:

> Jack Smith wrote:
>> BPS makes a small grid prototype board that will mount a variety of SMT
>> parts - one board accommodates different size parts.
>>
>> http://www.busboard.us/pdfs/BPS-MAR-SP3UT-001.pdf
>>
>
> A small British company is now making RF prototyping boards that have
> square pads on a 0.1in grid, with a continuous copper groundplane on the
> reverse. Every pad has an unplated hole drilled through to the
> groundplane, which allows good RF grounding.
>
> The board is very versatile because you can mix and match various styles
> of construction on the two different sides.
>
> The groundplane side can be treated as continuous copper for dead-bug
> and 'ugly' styles of construction, but the pre-drilled holes make it
> very easy to connect through to the pad-style wiring on the other side.
> To make insulated lead-throughs, simply remove the copper around the
> selected holes.
>
> On the pad side, the 0.1in grid is suitable for conventional wire-leaded
> devices and DIL ICs, along with many of the larger SMD packages.
> Smaller-pitch devices can be soldered dead-bug style on either side of
> the board - whichever way works better for that particular part of the
> circuit.
>
> <http://cgi.ebay.co.uk/RF-Matrix-PadBoard-149x114x1-6-Prototype-Circuit-B
> oard-/170586485860>
>