Calculate the frequency and/or duty cycle of an astable 555 timer.

For example, the timer receives an event signal from the CPU ... For almost any longer time including hundreds of years, consider 555 astable coupled to SN74LV8154 32 bit counter.

The circuit is simplicity itself, just an astable of the type that has made ... We celebrate everyone’s favourite timer chip here at Hackaday, so much so that we recently ran a contest to ...

I need a circuit that when input goes high (5V) the output will go high for approximately 180 seconds. (The tolerance can be +/-20 %) Will the SN74LVCG123DCUR work for this application. The size of ...