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Make sure you follow the traced line well until it is completely removed from the box. Be careful while cutting the traced circle of the box not to damage the table with your knife or not to injure your hand. If you are kids make sure you have a grown up with you while making the projector. Once you’re done, the mobile phone projector is ready to use. Creating your own projector is a fun DIY activity that you can do yourself. So, try it out yourself and let us know in the comment section how it turned out to be.

It’s best to cut a little bit to the inside of the circle you traced so that the magnifying glass will fit tightly and not fall out. Ideally, you should do this with thick paper – I used Fabriano. This will also help with the overall stability of your projector, as having one side cut out can make it a little wobbly.
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Make sure it is of high quality and a decent size for delivering the most premium image quality. After doing so, you can connect wirelessly with the Chromecast to start sharing your phone’s content with your projector. Another method to connect your phone to a projector is through a Chromecast or other similar device. It usually comes with a wireless dongle you can plug into the projector. If you have a projector that supports input through Bluetooth, you only need to pair the devices in Bluetooth mode to connect your phone to the projector.

Finally, glue the lens side onto the flaps of the inner box. I'm sure you didn't want to just pass by this without trying it out. This could be done by moving your device closer or farther away from the lens to attain the right image size and clarity.
Lightbulb
You should probably have some empty shoe boxes at your home; pick one from there. If you didn’t find any, choose any rectangular card box.Make sure the box is hard enough and won’t be damaged while cutting it with pressure. However you choose to use it, you will find this cinema projector easy and cheap to build. You can build one in less than one hour so you can build it and begin using it right away.
Using a magnifying glass is the simplest method for obtaining a convex lens. It would help if you considered the focal length when trying to project your smartphone display through the opening in your box. The focal length is the separation between the phone’s display and lens. The hot glue will ensure the glass remains in place while using the projector. There is a possibility that the lens will fall out if you do not pay attention to this step.
Glue gun with glue sticks
If you don’t have a mirror available, you can still make a projector. Place your phone with the image upside down directly in front of the lens. To keep the phone secured in its position, I recommend attaching it with a Velcro. Start sliding the lens slowly away from the mirror while looking at the image on the wall. You might need to change the distance between the wall and the projector if the image is not sharp enough. Use the precision knife to cut out the outline so that the magnifying glass fits snugly in the opening you’ve made.
Did you know that you can build a smartphone projector out of everyday objects? Wireless HDMI and mirroring are good options, but what if there is no TV screen to receive the signal? Locate a dimly lit area and turn your phone’s display to its brightest setting. Ensure you put it on a table six inches behind your lens, facing a projector screen or a white pinned paper. You should have enough knowledge to estimate the size of boxes you require.
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In this cable, the power is sent directly from the projector through the HDMI port to your phone. The best thing about wired connections is the speed and video quality it offers. Some cables can handle up to 4k resolution videos, and you will rarely experience any lag or buffering in the video.
Without the mirror, your smart phone projector won´t correct the inversion of the image. For that reason, I recommend you avoid anything with writing. For this DIY you'll be needing a couple of things to put this together so you can have your smartphone movie projector just the way you want it.
It builds upon the Wi-FI Direct feature in android and facilitates a smoother connection between your phone and the display device. Many projectors nowadays support wireless connection with mobile through Wi-Fi direct. If you do have this kind of projector, you can connect to any android phone that has Wi-Fi direct capabilities. You can also connect your phone to a projector wirelessly, and there are several methods you can go about it. Some projectors support connection over Wi-Fi connection, and some can even stream your screen through Bluetooth.
All you need is a car headlight projector lens and some other parts and instructions for making this HD smartphone projector. The dispersion of light increases broader the farther away the smartphone projector is from a surface. It implies that large projections will seem extremely black in all lighting conditions. The lens concentrates and refracts light to project images from the phone.