This presentation discusses flip flops used in digital electronics. It introduces flip flops, which are circuits that have two stable states and can store state information. The presentation describes a traffic light circuit that uses an IC555 astable multivibrator to generate clock pulses for an IC4017 counter chip. An RS flip flop is used in the 555 timer. Applications of flip flops mentioned include counters, registers, RAM, frequency division, data storage, and data transformation.