Russell McMahon wrote:
>
> Here's a hypothetical (let's say) challenge.

> Each toaster has a double pole switch which disconnects the element from

> The test must reliably determine, at lowest cost in time and effort,  which
> toasters have one switch pole permanently closed so that one or other of the
> live leads is connected to the element.


Something like an RF "dip" meter, a couple of transistors
and a meter, and one probe. Using the prong like an antenna
and detecting loading. The prong connected to the element
will have a different loading and operate the meter. You
only have to probe 2 prongs.

Or just don't bother fixing them, just ship the lot out to
a third world country, you know, where they just stick wires
in power points with their bare fingers etc.
I've heard some scary stories about construction sites in
China. ;o)
-Roman

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