how would u design a circuit that shows peak value of voltage ,voltage ranging from 1v to 15v ,(integral values) .given 15 v dc supply only.

sample
input display
5v 5v
3v 5v(displaying the previous peak)
8v 8v
2v 8v

 

Take a look at this section in the AAC ebook.

hgmjr

 

you can use a peak detector circuit.