Handheld Ultraviolet Black Light with UV LEDs and a PVC tube

I frequently conduct experiments in my work space, one of which required a source of ultraviolet light. Rather than purchase one online, I decided to build my own handheld version out from a few UV LEDs I got at the local electronic store.In this project,I will show you how to make a reasonably sim…By: LabRatMatt(…)