The 555 timer IC ... output pulse in monostable mode or the output frequency in the astable mode. When not in use it is recommended that this input should be connected to circuit ground using ...

The 555 timer is a versatile integrated circuit (IC) that can control timing in electronic circuits. It's one of the most widely used ICs due to its reliability and flexibility.

By focusing on the simplest 555 circuits ... Most of the demos use the timer chip in free-running mode, but circuits using bistable and monostable modes sneak in at the end too.

Applications of commercially available integrated timers, including the NE/SE555, are fairly limited when used in their monostable ... output of a 555 timer fitted with this circuit can also ...