I didn't know the voltage stabilisers are active components, I thought they are just a bunch of caps that filter out different levels of noise, ie large caps for low frequency noise and smaller caps for high frequency. I don't think they have a regulator inside, because the two terminals from the stabiliser are connected in parallel to the battery terminals, so even if theres regulator across it, it will do nothing. (A regulator takes power supply of some voltage, say 14V, and outputs a more stable voltage say 12V and try to keep it there, so it will definitely require at least three wires from the voltage stabiliser, but most of the stabilisers I see on the market only have two.) As for low frequency noises, you are right, caps that are not big enough will not be able to supply enough current, that's why these voltage stabilisers cost so much, cos a good one will need to have several good "Farad's" to supply enough current.
Since they are so expensive, I'm actually trying to design one myself, there are a couple of friends that want it as well, so I'm getting a PCB designed for it and also getting a proper heatsink casing for it. I'll let you guys know how I go with it, maybe a custom made one will cost just as much as the one in the market, who knows
QUOTE(bigdenis @ Mar 21 2005, 04:31 AM)
Ok, they're quite inexpensive, however, I'm just wondering if they be any good on a V6 Camry? Any input appreciated, thanks.
UPDATE: I've read the following from Toyota Nation:
There was one guy who did a full test on audio cap with a scrope monitoring voltage drop with and without a cap. Result is bad. The cap did smooth out the curve a bit but never was able to do anything useful when bass hit.
A cap will remove high freq noise in electrical system. They'll never remove low freq noise produce by bass. Reason is the bass took so much current the cap can't hold that much.
A voltage stabilizer or regulater is an active component which will step up voltage when supply voltage drops. Sounds good. Problem is battery voltage drop due to bass hit with high current draw and system can't supply such high current. In order to step up voltage, the regulater need to draw more current from the system, Power = Current x Voltage, to keep Power constant with lower voltage current gotta increase. Now our voltage problem was because of not enough current and we're trying to draw more current to fix it Don't think that'll work.
A voltage regulator works great only when system voltage is greater then needed. Say 24V source for 12V component. A regulater will be happy supplying 12V all the time. On a 12V-12V system, the regulater need to draw more current to keep output constant.
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