This is a great weekend project, especially if you have an old 3.7 volt wall adapter. I have a box of these in my shop, but I never now what to make with them. Be sure to check the output rating (is is usually printed on the wall adapter).
SAFETY NOTE: The UV LEDs you can purchase actually give off near ultraviolet (400nm) light which is in the same range as a normal blacklight. This means they are safe and will NOT damage your eyes or give you cancer. This project is so simple that MAKERS of any age can build it. It gives off a soft blue/green glow at night that is perfect for use as a night light. It is also bright enough to use as a message board during the day so you don’t forget that important appointment. This project was featured on Instructables.com
Uploaded to YouTube by crndy52
Retrieved Wednesday 14th December 2011 10:14 am EST