This is a
switch debouncing circuit that employs a 555 timer IC. One
problem with any pushbutton switch is the oscillation that occurs when
it makes electrical contact to close the circuit. This can result
in 'bounces' or undesired multiple pulses that can lead to errors in digital
circuits.
The
circuit above can be used to 'debounce' a pushbutton switch. It
gets its initial trigger from the pushbutton switch and outputs a single
clean pulse that the receiving circuit can use error-free. In this
circuit, the 555 timer is essentially configured as a
555 monostable
multivibrator.
Learn more about the 555 Timer IC and
its applications...
See
also: Op Amp
Monostable Multivibrator
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