Wall Plug To Car Voltage Adaptor? Anybody Know Where To Buy?

[putraged]

hi guys

im looking for a converter from wall plug 220v AC current to car's DC current (12v, Amps??)

anybody know what & where to buy? and what's the device name?

im going for some Xenon projector headlights project and need lots of DC electrical source so i dont have to use my car's battery all the time.

thanks a lot guys.

[Jack88]

Please explain what your trying to do again, what you said didnt really make any sence but from what i got out of it your trying to power some headlight globes outside of the car for something else?

You need to work out how many amps your circuit will draw so you can choose a plug back adapter.

Amps = Watts ÷ Volts.

So using that formula if you have a standard headlight globe which is 55 watts you would have a current draw of 4.5 amps for each globe. Remember tho that a cars electrical systems voltage can vary abit. Normally when the car is running it will be at about 14.x volts, as the voltage rises the current draw will lower so you dont really have to worry about it.

Plug back adapters that can supply a decent amount of current 10 - 15 amps will be rather expensive IF you can even find one. I would recomend buying a AC - DC power supply , something like this will do for most applications.

http://www.jaycar.com.au/productView.asp?I...mp;SUBCATID=381

or

http://www.jaycar.com.au/productView.asp?I...mp;SUBCATID=381

[putraged]

thanks for the enlightenment jack, i just bought a power supply today.

anyway while u're here, got some q's as well.

when we're installing tweeters, we got confused whether its a positive/negative pins since there's no writings on the tweeter pins. do you know the device name to check whether the tweeter power cable is in the right order?

thanks a lot

[Jack88]

Not a problem .

What kind of power supply did you buy?

I wouldnt worry to much about it. Just make sure you do the same with the other one when you install that.

If you wire them up back to front the tweeter will be out of phase to the woofer in your door, its not really a problem with tweeters as they operate on a higher frequency which isnt afected much by it. I doubt you would be able to hear a difference between being in phase and out of phase.

You would need a multimeter to test the resistance of the tweeter but its not going to tell you which wire is the negative or positive it will just show the resistance of of it so theres no real point in even testing it.

As i said above i wouldnt be worryed about it.

[Gav]

For a free (or almost free), rob a power supply from an old computer.

You will get both 12V and 5V CD (good for USB powered projects) at around 200W minimum.

[Jack88]

thats actually a good idea haha.