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StewR Occasional Visitor
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Joined: Dec 13, 2005 Posts: 4
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Posted: Tue Dec 13, 2005 2:05 am Post subject: Custom power lead for both Tomtom BT and XDA |
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Hi all,
Has anyone already done this, or does anyone know if it is possible... to power both the XDA IIs and the Tomtom Bluetooth GPS receiver from a single cigarette lighter plug?
I have a cigarette lighter power lead for both the XDA and BT Tomtom and I'm thinking about cutting the leads in half and joining the wires so that they are connected to just the Tomtom BT GPS cigarette power cable.
e.g.
Code: |
________ tomtom
/
<==------
\________ XDA IIs
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Does anyone know if this should be okay? and does anyone know which wires should be soldered to which? I presume the devices will still be protected by the fuse in the Tomtom cigarette lighter plug which is good.
From research I understand that the Tomtom cable has three wires, red, black and white. And the XDA cable has four wires red, black, white and green.
Can I connect just the red and black and ignore the others???
Thanks,
~S |
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lbendlin Pocket GPS Staff
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Joined: 02/11/2002 22:41:59 Posts: 11878 Location: Massachusetts, USA
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Posted: Tue Dec 13, 2005 2:27 am Post subject: |
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You better be careful here. Maybe you can find a friend who has more experience.
Although only two wires are required on each side, they must have a reason to provide more.
Also, the converter needs to deliver enough umph (Ampere) to feed both devices. If it's just 1A then this may be tight. 2A is better, but not as common. _________________ Lutz
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StewR Occasional Visitor
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Joined: Dec 13, 2005 Posts: 4
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Posted: Tue Dec 13, 2005 9:30 am Post subject: |
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Thanks for the reply.
The Tomtom cigarette adapter is actually 2A, so I'm hoping there will be plenty of power.
Just need to know about the wires :-)
~S |
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Crocodile Regular Visitor
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Joined: Jun 06, 2004 Posts: 196
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Posted: Tue Dec 13, 2005 3:17 pm Post subject: |
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I may have exactly what you need. XDA2s "Y" cable to power the XDA & a serial GPS (RJ11 socket) together with an RJ11 (plug) cable to DC jack to power the bluetooth GPS.
Let me know if you're interested & I'll think about a price. |
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StewR Occasional Visitor
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Joined: Dec 13, 2005 Posts: 4
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Posted: Tue Dec 13, 2005 3:25 pm Post subject: |
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Thanks for the offer, however myTomtom is Bluetooth which has a 5V power plug (possibly 2.5mm jack although I'm not too sure) and not a RJ11 socket, so I don't think your cable will work :-( |
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Crocodile Regular Visitor
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Joined: Jun 06, 2004 Posts: 196
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Posted: Tue Dec 13, 2005 6:23 pm Post subject: |
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Crocodile wrote: | ....together with an RJ11 (plug) cable to DC jack to power the bluetooth GPS. | That's what this cable is for. |
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mikealder Pocket GPS Moderator
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Joined: Jan 14, 2005 Posts: 19638 Location: Blackpool , Lancs
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Posted: Wed Dec 14, 2005 9:56 am Post subject: |
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I would not recommend doing this for a number of reasons, firstly this type of cable does not readily lend itself to soldering, the insulation tends to melt, causing short circuits. The cable does not easily terminate in the screw terminal blocks (it’s too fine). If you manage to join the wires (inline splice - crimp type termination), this junction will always be a weak point on the harness assembly, probably letting you down at the most inopportune time.
What I would recommend is a cig lighter "Y" adaptor, that way two independent chargers can be used at the same time from a single power point - Mike |
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Crocodile Regular Visitor
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Joined: Jun 06, 2004 Posts: 196
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Posted: Wed Dec 14, 2005 11:01 am Post subject: |
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The additional charging cable I have is this one.
I also have an unused Tom Tom style car cradle for the XDA2s which would also work with the bluetooth charge cable.[/url] |
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StewR Occasional Visitor
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Joined: Dec 13, 2005 Posts: 4
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Posted: Wed Dec 14, 2005 11:36 am Post subject: |
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Hi Mikealder,
I was thinking of using a mono 3.5mm audio socket on the cigarette lighter cable, an audio splitter and then two 3.5mm audio plugs to connect to the cables to the XDA and Tomtom. Clearly it is not audio being carried, but I'm simply using the plug+socket combination to securely fix the wires (as this type of connector is designed for fine wire). I'm thinking that this should work.
I really want to avoid the Y adapter in the cigarette socket as it looks so unsightly and requires two wires to be dressed in around the dash.
So, does anyone think the audio splitter solution would work. We're only talking 5v and <2A right? |
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