Manufacturing technology of constellation projector

The manufacturing process of constellation projector is as follows:

I. Tools/raw materials:

Square piece, awl, paper tube, flashlight.

Second, the specific steps:

1. Cut a square slice of 10× 10 cm, and punch holes according to the brightness with an awl according to the constellation diagram.

2. Cover one end of a medium-sized paper tube with a piece of perforated paper. Pay attention to the front facing the paper tube, otherwise the constellation you see will be upside down.

3. Put the flashlight in the paper tube and project the constellation onto the white wall.