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How Useful is a Capacitor?


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Old 01-22-2007, 01:45 AM   #1
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A new story entry has been added:

[drupal=4]How Useful is a Capacitor?[/drupal]

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we've all heard of the case where someone just installed a sub/amp combo that does 500 watts and their headlights and interior lights are dimming when the bass hits. supposedly, the miracle fix is a 1 farad capacitor which suddenly stops this from occurring. i'll start off by saying a little background info about capacitors. capacitors are constructed by separating two or more conductors called plates with an insulator called a dielectric. if an AC signal is applied to a capacitor's plates, the current will flow through the capacitor. what actually happens is that if an AC signal is applied to the plates, the capacitor will charge one way (hence current flows), then when the AC signal reverses direction the capacitor discharges and then charges in that direction. this makes it appear that the AC current is flowing through the capacitor. a DC voltage connected to the same plates will not pass through the dielectric, and no direct current will flow through. therefore, this capacitor will accomplish a few things: it will block most DC current (accessory noise suppresion), and it will store an electrical charge that can be used later. please note: a capacitor does not create any current. any dimming or voltage drops are caused by a lack of current.

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Old 01-23-2009, 08:35 PM   #2
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they not useful u should do the big 3 then upgrade the alt

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Old 01-23-2009, 09:06 PM   #3
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Old 01-24-2009, 08:43 AM   #4
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i still run caps.....but i have other reasons

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Old 01-24-2009, 10:47 AM   #5
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i am running a cap, only because it came with the system i got (used.)

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