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Bench Talk for Design Engineers

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Bench Talk for Design Engineers | The Official Blog of Mouser Electronics


Battling the Bouncing Button
On February 10, 2015 in All by Mike Parks
Mike Parks
Mechanical buttons and switches can present unintended input trouble for embedded electronics projects. There’s an undesired effect known as “bounce.” What is bounce? When you press a button it sometimes does not cleanly change states. There is some electrical noise generated as the button rapidly oscillates between states immediately after a button is pressed but before it settles. Think of it like pulling a mass-spring system downward, letting go, and waiting for it to settle at equilibrium. Switches and buttons oscillate similarly, though the time to settle is measured in milliseconds.
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Tagged With: Arduino, MultiSIM Blue, oscilloscope, SR Latch

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