Debouncing button or switch inputs on microcontrollers can ... other capabilities to inputs you might want to look at this interrupt service routine (ISR) method from [Lee] aka [stockvu].

Arduino Uno R3 has two external interrupts: int.0 (pin 2 ... of metal contacts touching each other in an imprecise way as in the case of a mechanical switch, and this will manifest itself as missed ...

[JonBush] recently did a beautiful build of an Arduino-based fireworks controller ... For example, the power switch only interrupts the ground. It might be safer to disconnect both battery ...

When reed switch is opened, pin 2 of Arduino goes high with the help of the pull-up resistor R2, and the alert signal is available through the piezo-speaker PZ1 (not an active piezo-buzzer). At the ...