Slide projectors are great, but outdated, and digital projectors cost a bundle. Fortunately, you can show off your mobile photos and your phone hack savvy by turning your smartphone into an inexpensive projector.
When light passes though a lens (including the lenses in your eyes), it gets flipped, which means the picture from your projector will come out upside-down. No fear, though — we have a fix!
For the iPhone go to Settings > General > Accessibility and turn on Assistive Touch. Once activated, a little white orb will pop open that you can drag around the screen. Click on the orb and go to Device > Rotate Screen. This will allow you to flip applications like the Photos app, which would normally rotate itself right side-up.
Project onto a bare white wall or another flat, white surface.
Position your phone in its stand near the back of the box and walk the box forward or backward until the image starts to come into focus. Fine-tune the focus by moving the phone forward or backward in the box.
Set your phone’s photo app to slideshow mode for a hands-free experience.
If desired, put the power cord through the hole in the back of the box and seal with a bit of tape.
For best viewing, turn the screen brightness of your phone all the way up, put on the box top, cover any windows, and turn the room lights down.
Thanks to Instructables user MattBothell for inspiring this project!
Taking It Further
Other stand ideas include this ultra-portable Tiltpod, this handy dandy Gorillapod, or this super creative lego stand from this cool tutorial.
Use a large aperture camera lens with a focus ring for more flexibility with projection size and focus distance.
Use your magnifying glass to get an up-close perspective on your phones pixels.
Try using your computer screen instead of your phone as the display in a new projector project.