Options for a reversing camera

[moltuae]

Originally Posted by HPsauce

I'd be interested to know what you were thinking, given that the button on the RNS-D cycles through the available inputs I thought that might make it very difficult.

It might not be that difficult. Cycling would be possible, using a programmable device or maybe a simple counting circuit to generate the button activation pulses but I think a simpler approach might be to identify the video switching circuit and bypass it, especially if it turns out to be a regular composite video signal. The hardest part will be finding where the video switching takes place, then it's just a matter of intercepting it and inserting a second two-way video switch after the first. Of course this would all be much easier with a schematic diagram ..... I don't suppose anyone has one for an RNS-D?

It's possible also that the video switching takes place in the boot (haven't looked but the RNS-D head unit pinouts might give some clues). If that is the case, there may be a single composite video signal going to the head unit that you could intercept.