Difference between revisions of "Terminology"

Terminology (view source)

Revision as of 08:44, 11 April 2011

53 bytes added , 08:44, 11 April 2011

revise CC/CV

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 ;C: capacity - the charge/discharge rate in an hour. For instance discharging a cell rated 1000mAh at 1C means drawing 1000mA and it should last 1 hour; at 0.1C it would draw 100mA and last 10 hours.
-;CC/CV: constant charge / constant voltage - a method of charging lithium-ion batteries where a constant charge is applied up to some point, then a constant voltage is applied and the charging current drops to zero as the battery is fully charged.
+;CC/CV: constant charge / constant voltage - a method of charging lithium-ion batteries where a constant charge is applied until the battery reaches 4.2V, then a constant voltage is applied as the current draw drops. Charging terminates when the current drops to 5% or 10% of the initial charging value.
 ;CCFL: Cold-Cathode Fluorescent
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 ;donut hole: a dark spot in the center of the flashlight beam. This is a common problem with multi-die emitters (can also appear as a plus-sign in the beam reflecting the layout of the 4 dice) but can also be the result of a poorly matched reflector.
-;driver: the electronics in between the battery and LED. These are usually mounted to a circuit board in the "pill" and regulate the voltage to the LED as well as provide the various modes and memory of the light. See article [[Driver]].
+;driver: the electronics in between the battery and LED. This usually consists of a circuit board in the "pill". It regulates the voltage to the LED as well as provides the various modes and memory of the light. See article [[Driver]].
 ;duraloop: nickname for a Duracell precharged NiMH battery with a white top, made in Japan, and thought to be an [[Eneloop]] in Duracell wrapping. See article [[Rechargeable]].
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 ;lumens: (abbrev: lm) a measurement of [[Light Output Measurements|light output]]. Lumens measure all of the light output (compare to lux).
-;Lux: short for Luxeon [[LED]], an early high-power LED (also LuxI, LuxIII, Lux3, LuxV for different versions of this LED).
+;lux: 1. a measurement of light intensity. Lux refers to the number of lumens falling on a square meter. See article [[Light Output Measurements]].
+:2. short for Luxeon [[LED]], an early high-power LED (also LuxI, LuxIII, Lux3, LuxV for different versions of this LED).
-;lux: a measurement of light intensity. Lux refers to the number of lumens falling on a square meter. See article [[Light Output Measurements]].
 ;<span id="mAh">mAh</span>: milliampere-hours - a rating of [[battery capacity]] in thousandths of an ampere in an hour. A 1000mAh battery should be able to discharge 1000mA for 1 hour or 500mA for 2 hours.
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 ;memory: 1. The memory effect in some cell types, see article [[Rechargeable]].
-: 2. The ability for a flashlight capable of multiple levels of output to remember the last-used level and return to that level the next time it is switched on.
+:2. The ability for a flashlight capable of multiple levels of output to remember the last-used level and return to that level the next time it is switched on.
 ;Nailbender: a CPF member who makes high power P60 and other drop-ins for host lights.