how to make a home made projector?

by using a  std convex lenses. 

lemonie6 years ago

See over on the right under where you appear----------------->

You were 18 on thursday?

L

orksecurity6 years ago
This is rarely done just with convex lenses. Websearching "projection lens" will show you a number of diagrams of typical arrangements of lenses for the purpose.

Theoretically, if you aren't too picky about image quality, a gallilean telescope used "backward" ought to come close. But that too has one convex and one concave lens.