comp in car question

[LuckyBob]

A question - would a power capacitor from a car audio application across the inputs for the inverter filter out the noise going back into the system? Seems like it would. Thoughts?

Ken

/me is just speculating here...
I think it'd help with the big spikes in power draw from the inverter (like when the comp first powers on and the power supply charges it's storage caps), but I think a lot of the smaller noise going upstream would require more than just big caps. I'd suspect one big cap, a few smaller caps, one or two REALLY (in the pF range) caps, and a fairly robust inductor would minimize the lot of it, but since I don't have an ocilliscope to look at exactly what a computer power supply does to AC or an inverter to look at the resulting effect on the DC power, I couldn't say exactly what components'd be necessary.

If I've got some free time before work tomorrow I'll see if I can crack open one of my spare ATX power supplies and see if it's feasable to use the inards of one of them as a DC-DC power inverter.

/me crosses his fingers for them using a 12-14v secondary winding, as it'll be dirt simple that way.

BTW I didn't mean to sound as negative as I did in my last post. I reread it and realized I wrote all that out in the haste to make sure the thread wasn't abandoned on the basis of semi-incorrect information. My bad.