555 TIMER ICThe 555 timer monolithic timing
circuits are highly stable controllers capable of
producing accurate time delays or oscillation. In
the time delay mode of operation, the time is
precisely controlled by one external resistor and
LM556 have dual timing circuit is a highly-stable controller capable of producing accurate time delays or oscillation. Timing is provided by an external resistor and capacitor for each timing function. The two timers operate independently of each oth..