Make an inexpensive & simple UV LED Torch
From our friends at instructables comes an easy project for use with UV LEDS.
To make this simple project, here's what you'll need:
2 Ultra Violet LEDS
1 1/4W resistors (the value of the resistor needs to be calculated based on the forward voltage of the LED you use)
1 non-working 9V battery (or a 9V battery clip)
1 new 9V battery
Pliers
Solder
Soldering equipment
The full instructions on the Instructables site will show you how to put everything together. Once assembled, the light snaps Read more [...]