First of all, just a caveat: I am a complete newbie with electronics, computer software is more my thing!
I have bought a (used) car this morning and it came with an old TrafficMaster Satnav installed which I have now removed. It seems that a power jack has been installed in the dashboard to power it.
I usually have my phone in a dock and run a long micro usb charging cable to a cigarette lighter USB charger so I can charge my phone while driving.
It would be nice to utilise the power jack that has been installed, to charge the phone as it will be a neater solution than running the long USB cable.
The old Trafficmaster is powered through a 2.5mm audio jack, the other end is moulded to the unit. Therefore the power jack installed in the car is the female end. This all works and the Trafficmaster recieves power.
The TrafficMaster is pictured here
What I want to do if possible is make a cable that has the 2.5mm jack at one end and a micro USB on the other.
Is it possible to take a spare USB charging cable cut the micro USB off, cut the 2.5mm off the trafficmaster and solder the ground USB wire to the ground audio jack wire and the 5V USB wire to the 5V wire in the 2.5mm connector? (Is there one!?)