is failing to perform its logical function can be accomplished by various
means but the simplest and most expedient is with the aid of a logic probe.
This invaluable tool comprises a hand-held probe fitted with LED to
indicate the logical state of its probe tip. In use, the logic probe is moved
from point to point within a logic circuit and the state of each node is
noted and compared with the expected logic level. In order to carry out
checks on more complex logic arrangements a logic puiser may be used
in conjunction with the logic probe. The puiser provides a means of
momentarily changing the state of a node (regardles ...
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