In the first post you are asking for an explanation "in air" for just a subject. In second, you are explaining it yourself, and asking other to search the forum for a schematic. What else do you expect ? Do you expect every one to search the forum for the schematic with your said parameters, and write a story for your science fair project? Looking at your profile pic, dont you think a "clap switch" is too small for you? or you are "helping" some child for his project for a benefit.
Cheers