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From: Keith R. Williams
Subject: Re: What are these terms in PCB design?
Date: Fri, 4 Oct 2002 10:52:02 -0400
References: <firstname.lastname@example.org> <email@example.com>
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In article <firstname.lastname@example.org>, a?n?g?e?
> On Thu, 3 Oct 2002 15:01:00 -0400, Keith R. Williams
> >Works for me. With a single layer you don't need plated holes so you
> >solder on the bottom (or back) side. Components go on the top.
> Erm, if the holes aren't plated, how's the electricity going to move
Wires (leads). The components stick trough and solder to the pads on
the bottom. You don't need plated holes because you don't have printed
wire on the top, so no vias nor component connection to top wiring is
> >Remember, the board is a mirror image when you look from the bottom.
> >Data sheets normally have show the top view.
> I realized that halfway through... :(
> That's where I got pretty confused :PppP
We've all been there. Some learned the lesson before you were born
(turned 32 two weeks ago ;-), but we've all made that stupid *ow* (as
he kicks himself) mistake at least once.
The worst one was when all the wires of a FPLA were crossed *except*
the four corners. Fortunately the corners had the power/ground so they
were right (connected to internal planes). That one wasn't my fault
though. The DA system got some bad data.
> >Yep. Don't go overboard here though. Large lands also make it
> >somewhat harder to solder. That heat sink also works on a soldering
> Hehee, not likely to go overboard, the biggest space I have is like 3x
> 2.5 x 2.5mm squares. But given that this thing is going into a 100W
> space heater, I'll use every little bit I can to make the LED last a
> bit longer.
You might want to salvage that piece of magic that turns the
refrigerator light on only when someone's looking. ;-)
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