Flashlight Basics: Difference between revisions

In the head of a LED light there might be a [[driver]] which regulates the voltage from the batteries to some value optimal for the light source. For instance many LED's need a voltage of about 3.6 volts, so if you only have one AA battery (1.2 to 1.5 volts), the driver will need to boost the voltage to something the LED can use. The driver also can control different brightness levels to the light and special modes for SOS or strobe functions. Incandescent flashlights are often driven directly by the batteries without a driver.

Flashlights themselves can take different forms, including head lamps, and can be made of plastic, aluminum, stainless steel, or titanium (see [[materials]]). There are many different kinds of light sources and LED's that can be used too.