Q&A for How to Build a Projector Out of Cardboard

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Question

How do I insert the Smartphone inside the projector?

Community Answer

Open the box and put the phone into it; shoe boxes provide easy access.

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Question

What do I do if the picture isn't clear when I use the cardboard projector?

Community Answer

Make sure that the brightness on your phone is all the way up. Paint the inside of the box black or cover the inside with black paper. If this doesn't help, try using glass cleaner or nail polish remover on the lens.

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Question

How do you stand your phone up?

Community Answer

You let it lean against the box or get something to hold it up, like a stand.

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Question

How big should the magnifying glass be for the projector?

AwesomGirl312 :-P

Community Answer

It doesn't matter what size you use, you would just have to cut the hole bigger or smaller depending on the size of the magnifying glass.

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Question

What do I do if my images are not bright?

Community Answer

Turn up the brightness on your phone as bright as it can go.

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Question

How much should the distance be between the magnifying glass and the mobile?

Community Answer

They should be at opposite ends of the box. Make sure to turn your screen upside down, because of light rays bending it.

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Question

What power should the magnifying glass be?

Community Answer

It doesn't matter what power it is.

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Question

Can I use a plastic magnifying glass?

Community Answer

No, you will need to use a glass magnifying glass for this.

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Question

Will painting the inside of the projector black makes the image brighter?

Community Answer

Yes. You should set your phone really bright and color the inside of the box black.

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Question

How big should the box be?

Community Answer

You should get a box that is bigger than your phone so the phone has a bit more space.

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Question

How much does a magnifying lens cost?

Community Answer

They are very inexpensive. For a couple dollars, you could get a decent one to project the image clearly.

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Question

What if I don't have magnifying glass ?

Ranyiah

Community Answer

You can order one online. Or, if you have an old projector that does not work, you can take the clear glass out of that and use it as well.

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Question

Why do you have to paint it black?

ths 130028

Community Answer

We have to paint it black to avoid any unwanted reflections of light rays. Black absorbs all wavelengths of light and does not reflect any unwanted colours.

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