This reminds me of learning the benefit of wire colors way back in school.

Another group of students had just finished building an Altair 8080
computer kit.  When plugged in, it appeared to work so a student put the
sheet-metal wrap-around cover on it to finish the job.  The cover got stuck
so the student pried it out with a screwdriver.  The screwdriver went in a
bit too far and connected the line input voltage from the front panel
switch to the +5 volt bus. Bang! Pow! Zap!

The instructor gave it to me and another student to fix.  The front panel
with all the 16 address toggle switches, the 8 data switches, the 24
address and data leds, and so on were all wired in point to point with
white wire.  About ten times of opening and closing made the wires start to
break.

"Hmmm... where do you think this wire went?"

"What color is it?"

"White."

"Hmmm..."

At 11:08 AM 12/8/2003 +1100, you wrote:
>When wire-wrapping, I use a colour for each supply, one for inputs to
>the PIC, one for outputs.  Usually white for the outputs.  I choose
>white because of a conversation with Saruman that Gandalf reports ...
>
>' "White!" he sneered. "It serves as a beginning. White cloth may be
>dyed.  The white page can be overwritten; and the white light can be
>broken."
>
>' "In which case it is no longer white," said I. "And he that breaks
>a thing to find out what it is has left the path of wisdom."
>
>Clearly Tolkien knew about electronics reverse engineering.  ;-)
>
>--
>James Cameron    mailto:quozl@us.netrek.org     http://quozl.netrek.org/
>
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