Breadboarding

Sep 22, 2008 50 Replies

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



surfboards?

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In these kind of situations I create a small PCB to test the circuit.

Programmeren in Almere? E-mail naar nico@nctdevpuntnl (punt=.)

Not terribly convenient for the UK sadly. That's the sort of thing but you could get individual IC package 'stick ons' and strips for interconnections etc.

Graham

Make a layout on Eagle or your fav' tool, and get it fabricated at a fast-turn PCB house. If you're charging a reasonable rate you'll spend less than two hours (and probably one) for a small hand full of 2-sided boards, and you'll save more time than that by not having to fiddle with a new technology or agonize over whether those stick down strips (or whatever) are really doing their job.

And you'll have a much closer model to the real thing.

If you were in the US I'd send you to PCB Express

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Tim Wescott Wescott Design Services http://www.wescottdesign.com Do you need to implement control loops in software? "Applied Control Theory for Embedded Systems" gives you just what it says. See details at http://www.wescottdesign.com/actfes/actfes.html

If you're in a hurry, build it live-bug on a piece of copperclad.

Things like this can help:

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But it's usually easier to do a quick-turn PCB.

John

I was right about wainwright but was getting too many hits to filter. Then I recalled (from 28 years ago !) that the product was called "mini mounts" and google this time got it.

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I don't recall it being German and I can't find a site selling any. I'm sure there was a company in Bristol UK that sold them but maybe they've fallen out of favour ? They were very popular for RF work in particular.

Graham

Can't disagree there but this is so few components !

If the timescale allows, we might be able to tack it on to another couple of boards we'll be doing.

I did recall the product name in the end and google found it. Interesting but brief comments from Bob Pease at the bottom of this link from there.

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Graham

Similar kind of thing. Except I only need a handful !

Graham

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

How about pad-per-hole perfboard (preferably with ground plane on the other side) and either fine wire or copper tape?

Have Fun! Rich

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.

Graham

Never seen one with ground plane on one side.

Graham

Also look at

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Reasonable prices and their newer boards use what they call "EZ technology" -- basically the solder pads are recessed below the board surface. Carried by some distributers over on this side of the pond; not sure about y'all tho.

Rich Webb Norfolk, VA

So, who is responsible for seing to it that the production version of this gizmo will actually work?

Paul Hovnanian mailto:Paul@Hovnanian.com ------------------------------------------------------------------ The world is coming to an end ... SAVE YOUR BUFFERS!!!

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Farnell used to stock a prototyping board with a "collander ground plane" on one side.

C.I.F. stills seems to make something like this

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as the AL 201 at the bottom of the list.

Farenell stocks it under order code 1201481. I'm fairly sure that this isn't the part I used but it does seem to be the same kind of prototyping board.

-- Bill Sloman, Nijmegen

How do they compare to expresspcb, whom I have used ?

Graham

" I only wish I could send you a Wainwright 'Mini-Mount' catalogue. I bet I have one somewhere here in the archive."

Do these things still exist? I've heard about them from several different souces now,

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You can get double sided pcb's cheap, and I've always wanted surface mount "jumpers" for prototyping. George

The ultimate client. They just want a circuit.

Graham

You can get down to about 100 ps, 3 GHz or so, with Xacto knives and copperclad. Kapton tape can be really helpful... stick down a small square, notch out some ground windows, and solder the parts on top.

ftp://66.117.156.8/BB_fast.JPG

John

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