How a 555 timer works in monostable mode

In this case, we will be using the LM555 in a modified monostable mode. Actually, we will not be using either comparator in this design. The only timing part of LM555 that we will be using is the internal R-S flip-flop (see the What is a 555 timer and how does it work? section in Chapter 2, Infrared Beacon) in the following diagram:

LM555 block diagram