 Digital
voltmeters,
frequency counters etc
use 7 segment displays
to show the result of
measurements.
However all the internal
electronics use binary
for manipulation of the
data.
To convert this binary
to a form that can be
used by the display
requires the use of a
DECODER, in this case a
"binary to 7 segment
display decoder".
This has four inputs for
the binary and seven
outputs for the display.
Other types of decoder
are available such as
binary to decimal.
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