how to make mini projector

 

A mini projector allows a video to be projected onto a much larger screen. While a mini projector can be smaller than a smartphone, it can display images on much bigger screens.

In order to make your own mini projector, you'll need an LED light, water bottle cap, thumbtacks or tape and some kind of transparent object. Glasses work as well as anything else that is transparent. You'll also want to have any kind of clear or translucent lens that will fit over the opening of the water bottle cap and stay put with either tape or thumbtacks.

Preparing the LED light. Make sure the LED light is on its side (it will be upside down in your final product). The LED has at least three pins, two of which are long and one of which is short. Strip the wires off of all three of those pins. You can now twist those wires together to form a thick wire if you'd like, but I preferred to leave them as they were because they didn't need to be wound very tightly or keep a tight bend.

 

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Cuting the hole in the cap. Hopefully you're using a water bottle cap for your mini projector, but really any transparent object that will allow all the light out will work. The hole needs to be about as big as the bulb for your light and about 1/4" away from it. This takes a steady hand (or more than one person) to cut properly.

Insert the wires into the cap. Once you've made the hole, feed all three of your wires into it, being careful not to let them get twisted or caught on each other. Once they're in, use two thumbtacks or tape to secure them in place so they don't fall out when you turn it over and start messing around with the lens.

Adding the lens. Now that you've got the wires in place and secured, you can put the lens on top of your mini projector. Because of its shape, it will cover almost all of the opening in your water bottle cap. You may want to trim it down to make sure none of the bulb is exposed without actually cutting into any wires (although I didn't have to trim mine at all). Secure your lens with some kind of tape or thumbtacks so that it doesn't fall off and doesn't get scratched.

 

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Putting it together and testing. With both your light and your lens in place, you should have a mini projector ready to go. You can use it like a normal projector or you can project onto a surface using some sort of translucent or transparent material like paper. It would also be possible to take its power source (a battery) out and use an outlet so that you can project onto something big that is plugged into the wall rather than having to find an electrical outlet.

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How to make mini projector: tutorial details [for copyright reasons, this original article may not be copied verbatim]