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Author Topic: FAQ for first time case modders  (Read 88086 times)

PetaHertz

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FAQ for first time case modders
« Reply #140 on: October 11, 2003, 12:43:07 AM »

Squeak: no, if I = 0, and V = 5 then V*I=0. Power drain is 0.  That's why lengths of wire don't cause a power drain.  (well, technically they do, but it's so tiny it can be ignored).

Orion: I stand corrected.

**Edit**

Though my explanation helps me remember in very simple terms to always use a resistor with an LED.
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orion

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FAQ for first time case modders
« Reply #141 on: October 11, 2003, 07:46:02 AM »

Quote from: PetaHertz
Though my explanation helps me remember in very simple terms to always use a resistor with an LED.


That's cool.  It just doesn't describe why some people don't put in an inline resistor and still their power supplies don't explode in a blaze of glory. :)  If you're not driving the LED very hard, it might not push it into thermal runaway.
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PetaHertz

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FAQ for first time case modders
« Reply #142 on: October 12, 2003, 11:00:15 AM »

huh?
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orion

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FAQ for first time case modders
« Reply #143 on: October 15, 2003, 09:13:49 AM »

Quote from: MaxamusCrasious
wtf?


Blaze of Glory = Gross Exaggeration of Effects of Short Circuit on Power Supply

:)

I suppose I could have made it more obvious by saying something like "It doesn't decribe why some people don't put in an inline resistor and even so their power supplies don't burst from their computers and run screaming down the street." :)
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Alric_the_mad

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FAQ for first time case modders
« Reply #144 on: October 17, 2004, 05:13:14 AM »

Glasses never equal eye protection (didn't learn that from case modding, but good to know anyway).
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surfyboymark

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Re: FAQ for first time case modders
« Reply #145 on: March 12, 2007, 03:28:22 AM »

Is the best way to a cut hole for a fan a dremel???
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GideonX

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Re: FAQ for first time case modders
« Reply #146 on: March 12, 2007, 07:56:57 AM »

Is the best way to a cut hole for a fan a dremel???

Or a holesaw.
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hardcase

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Re: FAQ for first time case modders
« Reply #147 on: May 10, 2007, 12:46:56 AM »



That's cool.  It just doesn't describe why some people don't put in an inline resistor and still their power supplies don't explode in a blaze of glory. :)  If you're not driving the LED very hard, it might not push it into thermal runaway.

That's only because the power source has built in current limiting, then.  And the kind of current that a non-current-limited LED will draw is relatively small compared to the power output of the typical 5V or 12V rail of a power supply.

Also, this is DC current.  The source is not driving the LED - it's a static system.  The LED simply draws as much current as Ohm's law allows.
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anarchos

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Re: FAQ for first time case modders
« Reply #148 on: December 10, 2010, 06:58:50 PM »

sirs i'm a noobie here can you help me? i'd like to create a PCI cover for my PC i dont want the ones with vents in them coz i dont want negative pressure inside my pc..can you help me or guide or even give me a cutting template, for me to make one..thanks in advance and more power..
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Hak Foo

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Re: FAQ for first time case modders
« Reply #149 on: December 10, 2010, 10:55:52 PM »

sirs i'm a noobie here can you help me? i'd like to create a PCI cover for my PC i dont want the ones with vents in them coz i dont want negative pressure inside my pc..can you help me or guide or even give me a cutting template, for me to make one..thanks in advance and more power..

Why make your life harder than it has to be?  steal one from a dead 486.
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