How to hard wire a cell phone car charger? - Page 2 - Chrysler 300C Forum: 300C & SRT8 Forums
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post #11 of 16 (permalink) Old 06-05-2007, 03:33 PM Thread Starter
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Originally Posted by Mr. iNCREDIBLE View Post
that's what i was asking. most phones are regulated at 5 volts
What if I just take a house charger and cut it and connect a + and - to a constant power rather than a car charger?
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post #12 of 16 (permalink) Old 06-05-2007, 04:16 PM
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Originally Posted by NautcaSprt6 View Post
What if I just take a house charger and cut it and connect a + and - to a constant power rather than a car charger?


doesn't matter, without a voltage regulator you will be pushing 12+ volts into a phone designed for 5 volts.. it will smoke and catch fire (been there done that)

All I need to know is what the output voltage is, if you can tell me that then I can tell you what part you need to regulate the voltage (probably cost you 50 cents) and how to wire it.
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post #13 of 16 (permalink) Old 06-05-2007, 04:19 PM Thread Starter
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Quote:
Originally Posted by Mr. iNCREDIBLE View Post
doesn't matter, without a voltage regulator you will be pushing 12+ volts into a phone designed for 5 volts.. it will smoke and catch fire (been there done that)

All I need to know is what the output voltage is, if you can tell me that then I can tell you what part you need to regulate the voltage (probably cost you 50 cents) and how to wire it.
Sounds good.
Ill tell u when I get home.

THanks
Bert
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post #14 of 16 (permalink) Old 06-05-2007, 04:59 PM
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There weren't enough power ports for me either... so I hard wired a 3 port plug into the one under the console. I undid the screws and lifted enough to tap into it and then ran the wire under the console. I got it at Autozone and it has two spots for screws.

Actually, I used a single port one first that connects to the one under the console... and then I plug the 3 port one into it. I mounted it to the left side of the console (which ends up near the middle of my right leg when sitting). I have a Garmin GPS, and my Escort X50 plugged into that port. I have 5 charger ports in my car and I use 4 of them all the time. I don't like plugging into the ash tray one... too many visible wires annoys me.

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post #15 of 16 (permalink) Old 06-05-2007, 09:55 PM Thread Starter
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Mr. I
The charger says Input: 5.0v 0.7a
Now whats my next step?
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post #16 of 16 (permalink) Old 06-06-2007, 01:43 PM
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ok, here we go..

go to radio shack and buy this:
5 volt regulator IC #7805($.25 at radio shack):


then you have to cut the car charger wire you have, cut close to the cig light base.

strip back the insulation, solder the red wire to the right leg of the IC (the right leg is when the IC is on the table label up as in picture)

solder the black (ground) to the center of the IC

run wire from what ever source in the car (switched cig lighter, or any 12 volt power) and solder to the left leg, solder second ground from the center leg to a ground point on the car (ground wire on cig lighter, or metal frame for example) make sure that NONE of the 3 wires touch, I use shrink wrap to cover the solder points.

now the IC will generate heat (it's pulling off the extra 7ish volts. so I suggest bolting it to the metal frame and keeping it away from plastic or carpet. you can also wrap it in heat transfer insulation (any hardware store in the plumbing/heating dept). just keep it away from melt-able or flammable objects. wrapping in heat insulation and stuffed in an old Altoid can is what I did with mine (taped the lid shut) and stuffed it behind the console.
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