It is often necessary
for an electrical quantity
to be measured
and displayed, so
that a certain
action can be
instigated if
and when it
has reached
a limiting
value. Today,
this is readily
accomplished with
the aid of a processor
and a good quality
analogue-to-digital
converter (ADC). This
article describes the
design of such a
setup, complete with
power supply and a
number of input and
output facilities.
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