Re: Wiring 'Aux-in'(iPod)connectors to Car radios
A further photo, this time showing the adapter box from the outside. It is connected to the radio or stereo via about 1.5m 4-core screened cable. Fitting a 4-pole c/o switch allows for two things, (1) the I-pod, etc., can be left plugged in, using the switch to select sources. (2) the 'spare' poles are used to ground the unwanted input to prevent unwanted signal breakthrough.
A similar device could be made using a switched stereo jack, omitting the switch altogether, or using a double pole c/o switch instead of a 4-pole one.
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