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Difference between revisions of "Flashlight Basics"
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A flashlight (or "torch" for some English speakers) is a handheld light source powered by batteries. | A flashlight (or "torch" for some English speakers) is a handheld light source powered by batteries. | ||
[[File:Flashlight-parts.jpg|thumb|left|800px|Disassembled flashlight with parts labeled. Click image for a larger version.]]<br clear=all> | |||
== Light Source == | == Light Source == | ||
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== Driver == | == Driver == | ||
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 | 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 LEDs 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. | ||
== More Options == | == More Options == | ||
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 | 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 LEDs that can be used too. | ||