Yes tandy used to make a talking Multimeter based on an old Sharp chip.
I imagine its now very obsolete. They tended to brand stuff already out
No way back in the 1970s, at TV factories they bought an eht probe, It
seemed to basically be some kind of inert plastic tube with a big metal bit
on the end and it ran on a pp3. Not much inside, just a single FET I think,
and a meter, plus a few bits and pieces.
Thus one might assume it would have been relatively simple to use the meter
output to change the frequency of an audio oscillator.
It actually could pick up voltages on stuff some feet away, and was
surprisingly immune to RF or magnetic field spurious signals on what must
have been a very high impedance probe.
You were right about clothing though. We used to try it on the office girls
as they walked through, very funny showing them how electrically 'hot' they
were. OK the hormones of youth!
These days though one does not need such things except perhaps when handling
mosfet based components not connected to anything, but I remember noting how
charged up a vinyl record could get by just sliding it out of its inner
sleeve. I often wonder why they did not press them out of the inert plastic
they made the probe shell out of, but maybe it was not suitable.
If I see the lady this week I'll ask her about the soles of her shoes though
since it seems that as I have carpets here which are mostly synthetic,
certain types of plastic soles can gather the free electrons needed to
charge put the person. However it is odd since the vacuum cleaner hose is
all made of plastic except the very end bit about 6 inches long, and one
would not expect such a small mass to be able to give the sound or the
shocks she generates.
I guess she could be an alien, but if so, I do not think the Earth has much
to worry about!
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"J. P. Gilliver (John)" <G6JP...@255soft.uk
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