One of the most common types of timers is the programmable interval timer (PIT). Digital timers are used in safety devices such as a gas timer. It displayed a button and a 60-second countdown timer. In computing, the jiffy is the duration of one tick of the system timer interrupt. Soon after came the wall switch module and the first X10 timer. Examples are the 555 timer and the switch debounce circuit. Lundvik primes a remote trigger for the nuclear bombs set on a timer. For longer time periods, a mechanical clockwork timer is installed. Timing parameters like P1 and P2 timer has to be mentioned. The slave's internal timer is an inexpensive analog timer. A similar mechanism is the watchdog timer. He is also able to take seconds off the in-game timer. I/O, counter/timer, and serial communication. Each encounter featured a timer and a death limit. Generally, they include neither a timer nor a TV tuner.