The main advantage of such projectors is low power consumption.
Glue the styrofoam piece for the screen after that and then, the magnifying glasses in front.
Make sure it is large enough for the handle of the flashlight to fit in.
It can be used to enlarge images, and enable students to get a proper view of what is being taught.
To make it easier for you, I have included a video showing the entire process of how to make a projector from a flashlight.
Overview Name Flashlight Video Projector App for Android Updated Sep 29, 2021 Compatible with Android 5.