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Breadboarding

R

Richard The Dreaded Libertarian

Jan 1, 1970
0
Never seen one with ground plane on one side.

Vectorbord used to make one, but I haven't been able to find them -
presumably, there wasn't enough demand to keep making them. )-;

Sorry for the teaser.
Rich
 
R

Rich Grise

Jan 1, 1970
0
I only wish I could send you a Wainwright 'Mini-Mount' catalogue. I bet I
have one somewhere here in the archive.

It's just such a breeze to use. It could be a useful side income for
anyone.

If you'd sent your layout to one of those quick-turnaround board shops
when this thread started, it'd probably already be done, and you could
be refining it now. ;-)

Cheers!
Rich
 
R

Rich Grise

Jan 1, 1970
0
I used to love that sort of thing when I was back at Boeing. The H/W
contractor would build something and 'throw it over the wall'. If anything
didn't work, they'd just say, "You can fix it in the software".

;-)

Q. How many engineers does it take to change a lightbulb?
A. None - we'll fix it in software.

Q: How many programmers does it take to change a lightbulb?
A: Not Applicable! That's a _hardware_ problem!

;-)
Rich
 
B

Ben Jackson

Jan 1, 1970
0
You can get down to about 100 ps, 3 GHz or so, with Xacto knives and
copperclad. Kapton tape can be really helpful...

Are you crazy?? I can't afford kapton tape! ;-)

But seriously, is there a supplier for kapton that's not $25-40/roll?
 
E

Eeyore

Jan 1, 1970
0
Rich said:
If you'd sent your layout to one of those quick-turnaround board shops
when this thread started, it'd probably already be done, and you could
be refining it now. ;-)

On account of budget reasons the design's not yet finalised actually.

Graham
 
S

Spehro Pefhany

Jan 1, 1970
0
Are you crazy?? I can't afford kapton tape! ;-)

But seriously, is there a supplier for kapton that's not $25-40/roll?

About $15 a 36-yard roll for 1/2" is easy (eg. McMaster), there are
some offshore sources for $5/roll landed but I'm not sure it's
actually Kapton (or generic polyimide) but maybe amber colored
polyester.


Best regards,
Spehro Pefhany
 
So near but so far !

If only I could get my hands on those Mini-Mounts.

Farnel can't be far away from you, and a single board costs a bit over
ten quid.

Why not order one (order code 1201481 - see above) and see?

Rich Grise's search skills don't sem to be up to much).
 
E

Eeyore

Jan 1, 1970
0
David said:
Tim Wescott wrote,

Of course they are. Have you forgotten olimex.com and Tsvetan Usunov
who used to post to this group from Bulgaria?

If Russia does that btw, it'll be full out nuclear war in no time. Many of those
countries are now NATO members.

Despite all the bluster, the Russians aren't THAT stupid. And half their
armaments are rusted to hell anyway and their forces are mostly drunk and don't
give a shit. They're going to hate it when Ukraine gets EU membership (and
possible NATO too).

Graham
 
Holy cow, that place sells everything...  I dunno qwhat the OP thinks, but
for my part, Good link, thanks!- Hide quoted text -

- Show quoted text -

Holy cow, that place sells everything...

You haven't used McMaster -Carr. How do you survive? One of the best
things about McC is their index! You don't appreciate it until you
try and find something in another catalog.

George
 
R

Rich Grise

Jan 1, 1970
0
Holy cow, that place sells everything... I dunno qwhat the OP thinks, but
for my part, Good link, thanks!

The astonishing thing is, they've got it all on hand. There's one a few
blocks from here, with a "will call" desk. You can order something and
drive down and pick it up.

But, admittedly, they're not shy about their prices - one guy I worked for
said that they're the convenience store of hardware. ;-)

Cheers!
Rich
 
J

JosephKK

Jan 1, 1970
0
Now, only a little while back I said I never breadboard, I go straight
to pcb.

This one's different though. The client wants to do the layout as part
of a larger scheme and I want to be double sure of stability in practice
as opposed to simulation because if he messes up, I can show mine
working fine.

As I'll be using a 65MHz ? op-amp I don't trust perfboard / Veroboard
for this.

I recall some self adhesive 'pre-etched shapes' that you could stick on
a ground plane. The name Wainwright comes to mind but google isn't
helping much.

Any suggestions ?

Graham

Actually a small lot quick turn shop sounds in order here. Unless you
desire to prove that you can make it work on perfboard (kludgeboard)
prototype don't bother. This client wants "professional look"
immediately. Disappoint at your own hazard.
 
L

Leon

Jan 1, 1970
0
Next time someone tells me I'm wasting my time making my own boards,
I'm going to point them at this thread :)

Last time this came up, it got me thinking.  I can etch on 8 mil FR4,
and double-stick tape that to an unetched copper clad board, to get
what I think you're asking for.  But, not being an RF expert, I have
no idea how well it would "work".  I think it would be worth the
effort to find out if this is a viable RF prototyping platform, just
to satisfy my curiosity, if you can send me a PDF of a SS layout (no
vias ;).  Contact me off-list if you're interested.

DJ

That technique works very well. Someone mentioned the Wainwright
system, which is basically the same - they were sometimes used at
Racal Comms for RF prototypes when I worked there. I've used it
myself, etching the carriers at home.

Leon
 
L

Leon

Jan 1, 1970
0
Next time someone tells me I'm wasting my time making my own boards,
I'm going to point them at this thread :)

Last time this came up, it got me thinking.  I can etch on 8 mil FR4,
and double-stick tape that to an unetched copper clad board, to get
what I think you're asking for.  But, not being an RF expert, I have
no idea how well it would "work".  I think it would be worth the
effort to find out if this is a viable RF prototyping platform, just
to satisfy my curiosity, if you can send me a PDF of a SS layout (no
vias ;).  Contact me off-list if you're interested.

DJ

That technique works very well. Someone mentioned the Wainwright
system, which is basically the same - they were sometimes used at
Racal Comms for RF prototypes when I worked there. I've used it
myself, etching the carriers at home.

Leon
 
E

Eeyore

Jan 1, 1970
0
JosephKK said:
Actually a small lot quick turn shop sounds in order here. Unless you
desire to prove that you can make it work on perfboard (kludgeboard)
prototype don't bother. This client wants "professional look"
immediately. Disappoint at your own hazard.

Ah, well the client wouldn't be getting it. It was more for my own peace of
mind. Plus it's a sort of freebie job in return for a favour thing so don't
want to spend much money on it.

Graham
 
E

Eeyore

Jan 1, 1970
0
Leon said:
That technique works very well. Someone mentioned the Wainwright
system, which is basically the same - they were sometimes used at
Racal Comms for RF prototypes when I worked there. I've used it
myself, etching the carriers at home.

Yes it was the Wainwright system I had in mind but I can find no info on
the web.

Graham
 
L

Leon

Jan 1, 1970
0
Yes it was the Wainwright system I had in mind but I can find no info on
the web.

Graham

They were extremely expensive for little blank PCBs with double-sided
tape on the back. I liberated a few from the lab for my own use when I
was at Racal.

Leon
 
E

Eeyore

Jan 1, 1970
0
Leon said:
They were extremely expensive for little blank PCBs with double-sided
tape on the back.

They weren't cheap as I recall for sure ! But I didn't need that much. Mind you
MOQs would probably have caught me out.

I liberated a few from the lab for my own use when I
was at Racal.

I have a feeling I likewise may have some in a box hidden away somewhere too.

Graham
 
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