My idea for powering carpc off wall at home (cheaply!)
Everytime I want to sync my music, or install stuff, it is a big hassle. The reason is that I do not feel comfortable running the carpc off battery for extended periods of time. Therefore, everytime I want to install something/sync my music/whatever, I have to unscrew everything, take my computer indoors, and use it there. It would be MUCH more convenient if I could just use the computer in the car, but being able to "plug" the car's electrical system into the wall at home so that the battery does not get drained. So here is my idea.
I came across this site:
I am mostly interested in the part which suggests connecting the +5 volts of 3 computer power supplies together to obtain 15 volts at a fairly high current (~25 amps). I have a TON of computer power supplies laying around, so this is no problem. To reduce the 15 volts to the ~13.8 volts that a car's electrical system requires, the site suggests connecting one of two high current diodes to drop the voltage to approximately that level. With this ~13.8 volts availiable at a fairly high current, I could then connect the +13.8 volts and -ground in parallel with my car's electrical system, then run my carputer without fear of a drained battery. Before I try something like this out, I would like to hear some opinons. Is this a good idea? Is there anything I have overlooked?
Also, the most difficult part is where I can find a diode which can handle such fairly high currents cheaply. I would prefer to buy locally and the only store that I know of that carries electronic components is:
I have not been able to find a suitable diode from looking at this site (maybe I am using the wrong search terms?)
Or could I go to a car junkyard to find these high current diodes? I know that high current diodes are connected to alternators to convert the AC > DC. But what exactly do automotive diodes look like? I've tried to do a image search, but I couldnt really find a good picture. Where under the hood would I be able to locate these diodes? Are they usually obviously exposed, or are they hidden in something? I am a complete noob when it comes to anything under the hood of cars.
Suggestions would be welcome. Thanks.