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09-01-2012, 11:45 PM #11
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- Mar 2007
- Grand Prairie, Texas
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Many 2011 and up trucks come with the USB port that connects to the stereo and can recharge items.
09-02-2012, 01:04 AM #12
My Kenwood headunit has a USB port on it, but I believe it only has enough power for the 1 USB port, not sure it has power for charging an Ipad, it might charge a cell phone.
I need multiple ports anyway (at least 3) for my personal phone, my on call phone for work, and my ipad. It would be allot simpler to reverse engineer a 7 port hub to get extra ports and make it compatible with the power system in the truck, well I thought it would be.
And then if I have my phone plugged into the USB port on the head unit, where does the thumb drive go with my music on it ?
09-02-2012, 02:12 AM #13
Just a quick note... Even though the iPad says its not charging it actually is, it's just not as fast. If you are plugged into the laptop and using the iPad it will recharge the battery a little slower then what is being used. Not sure if this helps you in your decision making.2011 Silverado 1500 Z71 4x4 Crew Cab
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09-02-2012, 08:57 AM #14
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- Mar 2006
- Cameron, NC
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Advance auto sells a cigarette lighter adapter that has 3 lighter sockets and a USB port for charging. Now, you could get one of those and use it in one of two ways:
1. Take the unit apart and take the already engineered regulator out and use that to power the USB hub that you said you wanted to use in the first place or,
2. Use the unit as-is and buy 3 cigarette lighter to double USB adapters, plugging one into each of the unit's cigarette lighter sockets, giving you a total of 7 USB charging ports.
At no point did I ever suggest you buy all of those items and dismantle them all for the parts to make a completely custom enclosure.
Either way, you are never going to be able to pull 14 amps through any circuit of this type.
Last edited by moogvo; 09-02-2012 at 09:00 AM."It went together didn't it? Well then there has to be a way to take it apart!" - Me.
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09-02-2012, 09:34 AM #15
So my thinking was to get 7 x 2.1 amp cigarette lighter USB adapters where each one has the resistors, regulator, pcb and gut them and make 1 unit with a single hot and a single cold lead that I can wire into the truck somewhere making it a clean install or factory type look.
That should give me 7 usb ports with 2.1a to each one for faster charging.
09-02-2012, 09:35 AM #16
09-02-2012, 05:48 PM #17
I got a chance today to disassemble one of the 2.1a single USB cigarette lighter adapters and here is what I found:
Here you can see the parts of the USB adapter.
Close up of the hot and cold connectors.
So this thing is already regulated down to v5 2.1a from 12v. What I am thinking about doing is taking 7 of these units and gutting them out of their cigarette lighter adapter and then installing them in a 7 port USB Hub housing for a normal USB Hub.
I am going to remove the coil spring for the positive connector and replace it with a red 10g wire for hot and the clip (negative) with a black 10g wire for the negative on each one.
I am thinking about adding a terminal strip for later expansion if needed.
And then I can just take the positive and negative from the cigarette lighter socket in the truck, remove it and put caps on them to connect them to the terminal blocks wires.
09-02-2012, 06:08 PM #18
Apple is trying to be sneaky. They always have to do something dumb to make stuff not work with normal stuff.
09-02-2012, 10:29 PM #19
09-30-2012, 03:43 PM #20
So this project is moving forward now after being benched for a few weeks. After learning how to solder and make a mess of it at @SurrealOne 's place, I picked up a soldering iron and decided I was going to fix me some leads on the USB charger in the photos above.
(This is my second attempt at soldering anything) so it is not the best.
So what I have now is 1 2.1amp USB charger with leads that I can either splice into my + and - cigarette lighter power cables behind the dash. All I need are 6 more to get 7 ports and an enclosure that will fit it all.
Then I will have my 7 port USB charging station in the truck.
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