Turn Your Smartphone Into a Microscope for $10
Whether you want to take some crazy macro photography or you just need to do a little laboratory work, Instructables user Yoshinok shows off how to turn your smartphone into a microscope for just $10.
The build here uses some plexiglass, bolts, nuts, a focus lens, and a laser pointer. The actual macro photography comes from using a cheap lens from a laser pointer, and the rest of the build is for the stand so you can actually take steady pictures. The magnification you get is pretty surprising, so head over to Instructables for a bunch of sample photos and the full guide.