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If no SMD, how to minimize?

B

Boki

Jan 1, 1970
0
Dear All,
I want to run a project, but no SMD support, in a very few
components (<10 ) circuits, which method is good way to minimize it..?

Thank you very much for your information.

Best regards,
Boki.
 
I

Ian Stirling

Jan 1, 1970
0
Boki said:
Dear All,
I want to run a project, but no SMD support, in a very few
components (<10 ) circuits, which method is good way to minimize it..?

Size, cost, ease of assembly, parts count, ...?
 
J

Joel Kolstad

Jan 1, 1970
0
Boki said:
I want to run a project, but no SMD support, in a very few
components (<10 ) circuits, which method is good way to minimize it..?

Design your own ASIC? Got a couple hundred thousand to blow on this?

Seriously, you need to tell us a lot more before we can provide you with any
useful information. What kind of project are you trying to do? Is the lack
of SMD support due to historical reasons (and therefore pretty easy to
change) or something like you'll be building a million widgets a year with
Chinese prison labor (and you want to save money)?

---Joel Kolstad
 
J

John Crighton

Jan 1, 1970
0
Dear All,
I want to run a project, but no SMD support, in a very few
components (<10 ) circuits, which method is good way to minimize it..?

Thank you very much for your information.

Best regards,
Boki.

Hello Boki,
if you are a hobbyist making "one offs" and experimenting for
fun, then just knock up what you want using "ugly construction"
or "dead bug" construction. Google those terms for more info.
How small you build your module up to you.

Here are a few links for you to get an idea.
http://users.easystreet.com/w7zoi/bboard.html
http://www.qrp.pops.net/ugly.htm
http://www.wa6otp.com/new.htm
In that last link, you can see how the builder has used
little pieces of stripboard to solder IC sockets on to them.
You can then super glue the strip board with IC socket
to the copper surface.

Have Fun,
John Crighton
Sydney
 
N

N. Thornton

Jan 1, 1970
0
Boki said:
I want to run a project, but no SMD support, in a very few
components (<10 ) circuits, which method is good way to minimize it..?


It depends how determined you are. For ultimate miniaturisation, start
with the leggiest component and solder all others directly to it, like
a hardwired ball. Ignore all minimum bend rules. Then try
troubleshooting it! :)

If youre using pcbs, put 2 leads in each hole stead of one, means
bigger holes, piggy back stuff, jam small parts between the others and
run the legs around to where theyre needed, cut off unused IC pins to
enable copper tracks to go there, multilayer boards enable tighter
part spacing, etc etc.

If desperate, cut the leads completely off the Rs and solder to the
ends - now though we have smds. Early smds were exactly that.

More app info reqd for more tailored info.


Regards, NT
 
B

boki

Jan 1, 1970
0
Nice reference, too.

I hope this fun go small and easy reproduction.

Thank you very much for information.

Best regards,
Boki.
 
B

boki

Jan 1, 1970
0
It depends how determined you are. For ultimate miniaturisation, start
with the leggiest component and solder all others directly to it, like
a hardwired ball. Ignore all minimum bend rules. Then try
troubleshooting it! :)



If youre using pcbs, put 2 leads in each hole stead of one, means
bigger holes, piggy back stuff, jam small parts between the others and
run the legs around to where theyre needed, cut off unused IC pins to
enable copper tracks to go there, multilayer boards enable tighter
part spacing, etc etc.

If desperate, cut the leads completely off the Rs and solder to the
ends - now though we have smds. Early smds were exactly that.

More app info reqd for more tailored info.


Regards, NT

"Ignore all minimum bend rules. Then try troubleshooting it"
I think you are expert. :)

"Cut off unused IC pins"
Good method.

"Early smds were exactly that."

Ha.... Thank you very much for your help.

Best regards,
Boki.
 
B

boki

Jan 1, 1970
0
Joel Kolstad said:
Design your own ASIC? Got a couple hundred thousand to blow on this?

Seriously, you need to tell us a lot more before we can provide you with any
useful information. What kind of project are you trying to do? Is the lack
of SMD support due to historical reasons (and therefore pretty easy to
change) or something like you'll be building a million widgets a year with
Chinese prison labor (and you want to save money)?

---Joel Kolstad

With Joel Cocacola's wife room.

Best regards,
Boki.
 
J

Joerg

Jan 1, 1970
0
Hi Boki,

Besides the "Sauerkraut" assembly of parts into a cluster there is
another technique, more for production: Flex circuits. Place all the
parts on a flex PCB and then roll or fold it up.

Regards, Joerg
 
I

Ian Stirling

Jan 1, 1970
0
N. Thornton said:
It depends how determined you are. For ultimate miniaturisation, start
with the leggiest component and solder all others directly to it, like
a hardwired ball. Ignore all minimum bend rules. Then try
troubleshooting it! :)

I find this method really easy.
You just use your x-ray vision, and solder with the glowing beams coming
from your eyes :)
 
N

N. Thornton

Jan 1, 1970
0
Ian Stirling said:
I find this method really easy.
You just use your x-ray vision, and solder with the glowing beams coming
from your eyes :)

lol, thats about what it would take. The one project I did like that I
didnt even try to troubleshoot the thing, it either worked or it
didnt. Just trying to find the right points to test, and trying to
connect to them is bad enough, cant even imagine soldering things.

NT
 
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