CD4027 is a common JK Flip flop based IC and if often used as data storing element. It contains two identical or symmetrical JK flip flop. Individual set of flip [[wysiwyg_imageupload::]]flop has provision of pin like set, reset, clock input, J, K and complementary outputs. JK flip flop can be used in applications like registers, counters or as control circuits. CD4027 is a master slave JK flip flop IC which works in toggle mode. Here, this IC can be used to change the state by signal applied to one or more control inputs and will have one or two outputs. In this output not only depends upon the current input. A flip flop is mostly used in computer for its memory circuit. In this circuit, both are opposite of each other for example voltage on Q bar is zero means Q should be having higher voltage.