To obtain this measurement, the researchers from Siemens Communications use a combination of ultrasound and infrared. Sophisticated sensor technology recognizes the pen’s position in real time. To write with the virtual keypad, the user simply “types” with the pen on the projected image. A distance sensor recognizes when a user is holding the pen to his or her ear and automatically reduces the volume. The signals are transmitted via Bluetooth. The pen for writing and telephoning is kept in the side of the bracket and features a built-in microphone and speaker. The projector system can even be used to give presentations and slide shows for small groups. Depending on the position of the bracket, the image can be projected onto a surface in front of the phone or onto a wall. The light source is a tiny semiconductor laser that emits monochrome light to project a real-time image of the display. On the side of the housing there is a swivel bracket that holds the projector unit. Small imperfections like scratches and dirt can affect image quality.At first glance, the mobile phone looks exactly like a conventional cell phone. You can also make your mobile phone projector clearer by using a high-quality lens. To get the clearest possible picture, do make sure you have your phone brightness to the maximum, minimize any light leakage from the box, and don’t have your projector positioned too far from the wall. You can, however, use old working projector lenses from old overhead projectors for your DIY smartphone projector. Unfortunately, there’s no cheap solution for those issues. Yes – though of course, the quality will not be as good as a proper store-bought projector.Īs you’re using a magnifying glass and not a well-constructed lens, it’s likely that the glass has some curvature and/or yields some chromatic aberration. This smart phone projector makes for a fun bonding experience with the kids! With a cardboard box, a smartphone, and a few basic household tools (like tape, a magnifying glass, and some others) you can create a working DIY projector. Just keep in mind that the image will be reversed, so try to avoid images that have any writing in them.Ībsolutely. If you don’t have a mirror, you can skip this step. This is how your projector should be looking at this point with the mirror on one side and the lens on the other: If not, then you can get an approximation by looking down at the mirror and making sure that you can see the lens. You can use a protractor to know the right angle. Place it on the back of the box (opposite to the lens) at a 45-degree angle. So, to correct the image from left to right, all you have to do is place a mirror in between the smartphone and the lens. It’s similar to what happens in a photographic camera, which is why DSLRs have mirrors in them to make you see the image in the viewfinder. In this process, the image gets turned around. They converge in the magnifying glass and are refracted towards the wall in an inverted cone. This is because the beams of light travel from the screen to the lens forming a cone. If you put your phone directly towards the lens, the image will be projected upside down and flipped left to right. How to make a projector with your phone and get it right side up? That’s where the mirror comes in. Now that you have the lens ready, let’s work on the other side of the projector. How to make homemade DIY props for photography.It should be wide enough to hold your phone, but not much wider than that because you want the light to go forward and not spill out to the sides. If not, just make sure it’s a rectangular box. Note on the box: This guide on how to make a DIY projector works best with a shoebox due to its size. Exacto knife or precision cutter (or scissors).Tape, normal or double-sided (can be substituted with glue).Thick black matte paper (alternatively, brush and paint).Some of them are optional, but having them will make the process easier and will get you better results. To make this you just need a few simple objects. This then projects an enlarged version of the image onto a wall. To build this makeshift projector, you’ll be constructing a box that directs light from your phone’s screen towards a magnifying glass.
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