2 May
2003
2 May
'03
1:13 p.m.
From: "Doug Coward"
<mranalog(a)attbi.com>
Ethan wrote:
Hi
This is the place to describe my method of finding
shorts on power planes. This is very much like the
resistive sheet methods.
You place a power supply across one of the two planes
that has shorts between them, such that about one or
two amps is flowing in current limit. You place one lead
of a volt meter on the opposite plane and then probe
with the other lead on the plane with the current flowing
across it. You find a line where the meter reads zero.
Now, move the power leads to an orthogonal corners.
Again fine the line of zero volts. Where the two lines
cross, you'll find the short.
There are variations of this method for finding shorts
between traces and even multiple shorts.
Dwight
How does a resistive sheet computer work?
I wrote:
Resistive sheets belong to a category of analog
computing called network analyzers.
Oops, I need to correct this.
Resistive sheets belong to a category of analog