1. Originally Posted by c0rrupti0n
I did read your previous post and was meaning to comment on it. I thought that the higher the guage the less current used, the more power the device has...(when dealing with a small amount of power such as 5 volts). However the more voltage requires a lower guage to avoid heading up the wire.

Thanks for your help I plan to give it a shot tomorrow...
First, I hope you didn't take my last post as being harsh... I didn't mean it that way

Anyway, higher the gauge, the smaller the wire. The smaller the wire, the greater resistance. The greater resistance, the greater voltage drop, and the more power dissapated (as heat.) This is true regardless of voltage. You're right that a lower gauge wire heats up less, but not that a higher gauge consumes less current (in fact, the lost power is what becomes heat.)

I think you've pretty much nailed the cause of your problem, and you're on the cusp of making it work. You just got the electrical properties of wire a little mixed up

2. Your the man mushin, Thanks so much for the explaination. Im going to try a 12 guage. I will let yeah know what happens tomorrow...

Out of curiousity, lets say you use a 0 guage wire at 15 feet with 5 volts. Would that work? Just seems like theres so much metal and yet so lil voltage to push across such a large wire.

3. I think it would more depend on the quality of wire than length. Less resisitance, longer shot, more resistance, shorter shot. If you use really good really low resistance wire, I'm sure you could shoot longer than 15 feet.

Edit: Radioshack in my opinion does not carry quality wire.

4. There are not really very many alternatives available for 'quality of wire'. Most wire is copper. The only better wire would be either gold or silver, and the expense would be excessive. The other alternative is to obtain a 'switching regulator' that would connect to the ignition and supply the 5 volts. This would remove the 5 volts when the key is switched off, causing unknown disturbances to the carputer (probably appears as removal of a USB device). An example of a switching regulator would be a modified Lilliput egg.

http://www.carnetix.com/lilli_usb_mo..._usb_mod_1.htm

5. The best wire you can get without going exotic is from your local hobby store. Should have 12-16 guage in spools, but it isnt cheap. There are a hundred times as many strands of silver wire inside a silicone case. If you can afford it I would recommed going that way. Do it once the right way versus how many times trying to save money.

6. Originally Posted by c0rrupti0n
Your the man mushin, Thanks so much for the explaination. Im going to try a 12 guage. I will let yeah know what happens tomorrow...

Out of curiousity, lets say you use a 0 guage wire at 15 feet with 5 volts. Would that work? Just seems like theres so much metal and yet so lil voltage to push across such a large wire.
Yes, 0 gauge wire would work for you, aside from being ridiculous overkill. More metal doesn't make it harder for current to flow, it makes it easier. As a rough analogy, think of it as road size. Bigger wire is like having more lanes; given the same amount of traffic, it'll be able to flow more smoothly without as much road rage (heat).

7. If your still having problems, It may be a impedance issue. Try putting a power supply at the cd rom. Search for the sproggy power supply information, and biuld yourself a small single circiut 12 to 5 volt switch mode power supply. Then the cd will see a perfect 5 volts, with no fluctuations no matter what the drive is doing. Even if your 15 foot power cable is dropping from 12 volts to 10 volts, doesnt matter the power supply will take care of it.
Just my suggestion, a way to solve the worse case senario i guess.
Hey it worked for me!

(audigy nx 2 in rear of vehicle, PC in front. Put a 5 volt sproggy style supply right next to the audigy nx, small cable from that to the front to the rest of the PC. SOLVED my noise problems totally.)

8. Originally Posted by c0rrupti0n
Your the man mushin, Thanks so much for the explaination. Im going to try a 12 guage. I will let yeah know what happens tomorrow...

Out of curiousity, lets say you use a 0 guage wire at 15 feet with 5 volts. Would that work? Just seems like theres so much metal and yet so lil voltage to push across such a large wire.
the thicker the wire the easier it is for the current to travel, think of a resistor, if you put another one in parallel the resistance decreases, add another one and it decreases again but a somewhat less amount, the more resistors you add the closer the resistance gets to 0, this is effectivley what your are doing by making the wire thicker.

edit: didnt realise this was already explained by mushin

9. I would like to comment about the type of wire used. Just like everyone is saying, larger wire => more power to device. But I would argue about using different types of wire. If my memory serves me, copper is a better conductor than gold or silver. The reason gold is used in audio equipment, is that no naturally occuring substance corrodes gold. The tighter the wire is wrapped and the thicker the wire is, are the only factors that pertain to wire quality in your situation. Hope this helps.

10. Originally Posted by mushin
Yes, 0 gauge wire would work for you, aside from being ridiculous overkill. More metal doesn't make it harder for current to flow, it makes it easier. As a rough analogy, think of it as road size. Bigger wire is like having more lanes; given the same amount of traffic, it'll be able to flow more smoothly without as much road rage (heat).
Also could think of your car as a really huge wire (i know not really, but go with it). You can get a good ground just about anywhere that's metal.

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