In many cases, the stairs have a power switch at the bottom which is often left switched on during night. No one wants to go down to switch it off and hence, [[wysiwyg_imageupload::]]unnecessary on, it leads to wastage of electricity.To solve this problem we have described a simple circuit which contains two micro switches; one at the top and other located at the bottom of the staircase that can be pushed and released easily during climb-up from the bottom of the staircase or climb-down from the top of staircase. In short you can use any switch to on and off the light.This simple circuit is built around a CD4013 IC which has two independent D type flip flops which exist in complimentary states and can store information. Each module is further equipped with a group of  pin outs assigned as data, set, reset, clock input and a couple complementary output Q and Not Q.