How to do the projector?

For a self-made projector, we need to prepare a lot of materials, including Fresnel lens, mirrors, wood chips and some nonwovens. The material of the shell is generally 3mm thick, and there needs to be a bracket for installing a mobile phone and a reflector inside, which also needs to be made of 3mm balsa wood plate.

the first step is to calculate the object distance and the size of the box, and make a good template for each part of the box by using cardboard. According to experience, the distance between the reflector and the Fresnel lens is about 7CM. In this case, a relatively clear image of 2 inches can be projected at a distance of 1.5 times.

The second step is to use the paper shell template to design and draw the outline of each part on the non-woven fabric, and then cut it out with scissors. This position is used to fix the Fresnel lens. It must be noted that the textured side of the lens must face the inside of the box, and it must not be reversed.

in the third step, we need to sew the two sides corresponding to the self-made projector with the box body by sewing machine.

in the fourth step, we need to use the light wood board to make the mirror bracket, and the bottom of this bracket is used to place the mobile phone. After that, it is necessary to make a simple frame for the Fresnel lens to support the box, so that the precision can be achieved.

in the fifth step, the whole box is formed, and the rest is the beautiful design. At this time, we need to add a metal button, and then put the mobile phone and the reflector in it, so that the whole diy projector is completely completed.