I want to install front and rear cameras on my car. However, the head unit only allows one composite in.
The circuit I am thinking of is below. I think the power side of the circuit is OK, but to keep things simple, I thought of just joining the composite signals with a simple rca splitter.
I only need to show one camera output at a time and am not too worried if the changeover is a bit rough.
My main concerns are… Will it work with just a splitter? Will I damage the head unit?
EDIT. After the feedback (Thanks). I decided to go with a DPST relay on the composite signal wire with common earths. This seems to be the same as manual changeover switches. As this is in a car, I will use standard automotive relays for this Any comments?