Terminology: Difference between revisions
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;<span id="PWM">PWM</span>: Pulse Width Modulation. A technique of varying the brightness of a LED by flashing it on and off very quickly, making it appear to the eye that the LED is dimmer. Good PWM is at such a high rate that you can't notice it. But if you wave your hand in front of the light and get a strobe effect, the PWM is getting too low. Some use current regulation which makes the light dimmer without PWM and is also more efficient. | ;<span id="PWM">PWM</span>: Pulse Width Modulation. A technique of varying the brightness of a LED by flashing it on and off very quickly, making it appear to the eye that the LED is dimmer. Good PWM is at such a high rate that you can't notice it. But if you wave your hand in front of the light and get a strobe effect, the PWM is getting too low. Some use current regulation which makes the light dimmer without PWM and is also more efficient. | ||
;QTC: Quantum Tunneling Composite - a spongy material that provides decreasing resistance as it is compressed. It lends itself to being used in twisty flashlights, providing infinitely variable brightness as the head is pushed down onto the battery. BLF posts show it in action in a [http://budgetlightforum.cz.cc/node/1599 Tank007 E07] and a [http://budgetlightforum.cz.cc/node/1909 Mini Maglite]. Pictures of the stuff are [http://budgetlightforum.cz.cc/node/870 here]. [http://en.wikipedia.org/wiki/Quantum_Tunneling_Composite Wikipedia article] | ;<span id="QTC">QTC</span>: Quantum Tunneling Composite - a spongy material that provides decreasing resistance as it is compressed. It lends itself to being used in twisty flashlights, providing infinitely variable brightness as the head is pushed down onto the battery. BLF posts show it in action in a [http://budgetlightforum.cz.cc/node/1599 Tank007 E07] and a [http://budgetlightforum.cz.cc/node/1909 Mini Maglite]. Pictures of the stuff are [http://budgetlightforum.cz.cc/node/870 here]. [http://en.wikipedia.org/wiki/Quantum_Tunneling_Composite Wikipedia article] | ||
;<span id="ramping">ramping</span>: a mode in some flashlights where the brightness varies (ramps up or ramps down) and you select the brightness level you want. Sometimes this level is then memorized, but in the original [[NiteCore]] D10 it is only used until you turn the light off again. | ;<span id="ramping">ramping</span>: a mode in some flashlights where the brightness varies (ramps up or ramps down) and you select the brightness level you want. Sometimes this level is then memorized, but in the original [[NiteCore]] D10 it is only used until you turn the light off again. | ||