What is Contact Bounce

Generally the switches are made up of spring materials. When any switch actuates, the contact touches one another. Under the force of actuation, continuity is expected with single steady moment. But the momentum produced due to mass of the moving contact and the inherent elasticity in this mechanism makes the contact bounce one or several times before achieving a steady contact and coming to a full rest. The contact bounces for a period of milliseconds producing rapid electrical pulses. This effect rarely affects any power circuits, but creates noticeable undesired effect if used in analog or digital logic circuits. Digital circuits misinterpret the electrical ripples produced due to contact bounce as data streams which create undesirable results.

Voluntary Blink Controlled Communication Protocol for Bed-Ridden Patients

Biswajeet Champaty (National Institute of Technology Rourkela, India), Sirsendu S. Ray (National Institute of Technology Rourkela, India), Biswajit Mohapatra (Vesaj Patel Hospital, India), and Kunal Pal (National Institute of Technology Rourkela, India)