Just ask anyone involved in the free Tibet movement or any of the ISP's that host websites with the words free Tibet, they used to get massive attacks from DOS right through to serious and well planned attempts to hack these sites.
Spent an entire week assisting the fending off of one of these and having to rebuild a server after the attack got through with it.
As is noted above its possable but I have not noticed anyone mentioning that your AT/ATX power supplies actually convert the incomming AC to DC then is switched to high frequency AC (hence the term switchmode), it is possable in theory to modify your power supply to work off your car.
1st obtain a power supply with a schematic. Difficult but not impossable.
You will then need to remove the AC-DC coverter, this is not to hard, and boost the input filter caps to help remove the noise. Then the transformer will need to be rewound to deal with the lower input voltage and increased current which will be required on the input, also the switching transitor will need to be beefed up and a new heatsink added to deal with the extra heat.
Once you have gotten it to this point make sure you test it hard before you ever attach the motherboard.
Before the nay-sayers jump in it can be done and has been done, but unless you have an extensive junkbox and a heap of time it is not practical due to the cost, unless of course you live in New Zealand where a decent inverter cost a small fortune.
Of course if you can find a power supply that will allow you to rip out all of the high voltage section and directly input your car's DC you have all of the required output voltages, this is normally easier if you have a truck or bus that runs on 24 volts.
If you want to down convert the 13.8 volts that is standard in most vehicle power supplys the look at the 79xx and 78xx series of voltage regulators, whilst not as efficent as some of these super duper adaptors on the market they are easy to use there is also the LM317 adjustable voltage regulator for those odd voltages. I am not sure about in the US but most electrical hobbiest store should have data and application sheets on these devices here is a link to a dc-dc converter primer http://www.jaycar.com.au/pdfs/dcdcconv.pdf and this is a link to info on voltage regulators http://www.dse.co.nz/cgi-bin/dse.storefront/3d6431 9c00d7ecca2740c0a87f99073c/Export/catalogs/DTA0000 021.
Beware of some of the cheap plug in type converters as they only use resistors. I find it amazing that you can not buy decent equipment off the shelf in the US as there is plenty of demand for it I would have thought.
Anyhow I hope these links help
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Just ask anyone involved in the free Tibet movement or any of the ISP's that host websites with the words free Tibet, they used to get massive attacks from DOS right through to serious and well planned attempts to hack these sites. Spent an entire week assisting the fending off of one of these and having to rebuild a server after the attack got through with it.
As is noted above its possable but I have not noticed anyone mentioning that your AT/ATX power supplies actually convert the incomming AC to DC then is switched to high frequency AC (hence the term switchmode), it is possable in theory to modify your power supply to work off your car.
1st obtain a power supply with a schematic. Difficult but not impossable.
You will then need to remove the AC-DC coverter, this is not to hard, and boost the input filter caps to help remove the noise. Then the transformer will need to be rewound to deal with the lower input voltage and increased current which will be required on the input, also the switching transitor will need to be beefed up and a new heatsink added to deal with the extra heat.
Once you have gotten it to this point make sure you test it hard before you ever attach the motherboard.
Before the nay-sayers jump in it can be done and has been done, but unless you have an extensive junkbox and a heap of time it is not practical due to the cost, unless of course you live in New Zealand where a decent inverter cost a small fortune.
Of course if you can find a power supply that will allow you to rip out all of the high voltage section and directly input your car's DC you have all of the required output voltages, this is normally easier if you have a truck or bus that runs on 24 volts.
If you want to down convert the 13.8 volts that is standard in most vehicle power supplys the look at the 79xx and 78xx series of voltage regulators, whilst not as efficent as some of these super duper adaptors on the market they are easy to use there is also the LM317 adjustable voltage regulator for those odd voltages. I am not sure about in the US but most electrical hobbiest store should have data and application sheets on these devices here is a link to a dc-dc converter primer http://www.jaycar.com.au/pdfs/dcdcconv.pdf and this is a link to info on voltage regulators http://www.dse.co.nz/cgi-bin/dse.storefront/3d6431 9c00d7ecca2740c0a87f99073c/Export/catalogs/DTA0000 021.
Beware of some of the cheap plug in type converters as they only use resistors. I find it amazing that you can not buy decent equipment off the shelf in the US as there is plenty of demand for it I would have thought.
Anyhow I hope these links help