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73367 2005-03-07 Re: [EE] Wire wrapping insight nee..	73386 1969-12-31 Re: [EE] Wire wrapping insight nee..
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73495 2005-03-08 Re: [EE] Wire wrapping insight nee..	73496 2005-03-07 Re: [EE] Wire wrapping insight nee..
73506 2005-03-06 Re: [EE] Wire wrapping insight nee..	73523 2005-03-05 Re: [EE] Wire wrapping insight nee..

Message #73033 of 126777
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Date: 2005-03-05
From: Senior Design
Subject: [EE] Wire wrapping insight needed!

Hi all,

My senior project design team is about to build a wire-wrapped
prototype of our final project. I was hoping that some of you may lend
a few [much needed] words of advice. Here's some general background
information:

0. We've never wire wrapped anything before...
1. We'll be using a PIC demo board (the 64/80-pin PIC18F8XX20 board)
at 20MHz to drive control signals for now... and the PIC by itself
only later when it's PCB time.
2. We'll be using a perforated board with 2-sided copper planes.
3. We've purchased solid AWG 30 twisted pair wire for wrapping.
4. We have a simple Radio Shack manual wire wrapping tool.

I'm obviously making implications with these statements -- i.e., that
we plan on using a power and ground plane, effectively shielding our
[very thin] signal wire using the twisted pair ground-ground concept,
etc. However, please don't take anything for granted. We don't really
know what we're doing :)

Any and all suggestions will very much be appreciated... wire sizes,
distances, power and ground methodologies, preserving clock integrity,
etc. I want to be able to do this right the first time, and I need a
lot of help from all of you experienced engineers.

Thanks so much!
Julian
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