Tricky.  I know a lot of Radio Amatuers knock up RF cicuits on plain PCB stock, and stick down small pieces of pcb to solder component legs together.  Not much help for circuits with IC's in though.  How about sticking a piece of plain PCB stock to the top of some perfboard?  A major downside is that you'd have to drill through for every component leg.  Still, it'd be cheap :o)

Cheers

Mike

-----Original Message-----
From:   Waytowich, Steven [SMTP:SWaytowich@NEORCC.ON.CA]
Sent:   Friday, March 24, 2000 3:07 PM
To:     PICLIST@MITVMA.MIT.EDU
Subject:        Re: [OT] noisy wire-wrapped project

Hello All,

I'm a newbie to the list and this is my first post.  I've listened intently
for the last three weeks just to get a feel for how the list operates.  I'd
like to commend all for their positive attitude and the feeling of "there
are no stupid questions" that this list displays.

Just a quick question about ground planes.  If you are using a run of the
mill "Perf"board, they do not generally have "true" ground planes.  I have
never really given it much thought, but how would you recommend duplicating
a ground plane?  I typically tend to leave my leads extremely short and my
prototyping area pretty compact to get rid of transient noise.

I have had noisy designs in the past (especially motor circuits) and I was
wondering if there is an easy way of implementing a ground plane without
going through with the cost of a multi-sided board or using gobs and gobs of
solder.

Steven Waytowich




-----Original Message-----
From: Harold M Hallikainen [mailto:haroldhallikainen@JUNO.COM]
Sent: Thursday, March 23, 2000 12:03 PM
Subject: Re: (ot) noisy wire-wrapped project




        Once again, I'm gonna push "ground plane". There's just too much
possibility of chips disagreeing on where ground is without it. A
prototype board that has a ground plane but has each pad isolated from it
should be good. Just do a short solder or wire bridge from the pin to the
ground plane. Similarly, power supply bypass capacitors would be located
at the power pin with the other lead going to the ground plane.

Harold






FCC Rules Online at http://hallikainen.com/FccRules
Lighting control for theatre and television at http://www.dovesystems.com

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