DIY Fiber Tester

Ever find yourself staring at a bundle of unknown fiber optic cables without your trusty (and expensive) Fiber Identifier? Fear not! As long as you're carrying your Android phone or iPhone you are in luck. Activate your LED flashlight and point one end directly into one strand of fiber. Check the fibers on the other end and you will see immediately which is which! I've uncovered a similar device on Instructables which would also be helpful but nothing beats the convenience of a device you're already carrying with you anyway.