Great info thanks, do you know how much current a TomTom draws when hooked up to a 5V supply?Here is a mount kit that has a wire you can hook directly to your car. But you have to use the mount. PDAMODS store: Tomtom One V2 Dashboard Flex Mount, Tomtom One Version 2
If you want to build your own follow this diagram.
Simple 5V power supply
parts are available at radio shack. Be sure to enclose it, it will get hot.
one the usb cable the red wire is +5V pin 1 and the black wire is the ground. pin 4. the white and green are data- and data +. pin 2 and 3 respectively.
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