@asper
Some ppls asked me for a pic from inside:
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Its basicly an upgrade of the USB-Mod. If you already have performed this you just have to add 2 more wires and a switch. The first brown wire is GND, the second is sense. Wire those cables to a 3 Pole Switch. Take care that the GND is in the middle. With this method you can later add a LED, which lights up when youre in device mode. The power for the led can be taken off the original led board (red wire). You might have to create youre own Mini-USB to USB cable, dont know if this can be buyed.
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Can I see a photo of the whole thing including the switch, from what I gather is going five volts to the switch then to USB right ?