[R-B] designed a 555 timer circuit to scan a keypad. Keypads are common interfaces for small projects and require row and column scanning by a microcontroller. [R-B’s] setup allows you to reduce the ...

Electrical contacts in mechanical pushbutton switches often make and break contact several times when the button is first pushed. A debouncing circuit can remove the resulting ripple signal to provide ...

What causes a switch to bounce, and how many times will a switch bounce? Methods of debouncing a switch. What is NoBounce technology? Most people, especially non-engineers, tend not to think about ...