I'm actually working on a little circuit to enable me to do this, I wanted to be able to have "modes" selectable by a switch in which different camera will be on, etc.... hopefully I can get it working soon and I can detail it here.
Notes on the circuit.......
4 different systems to be controlled by a single circuit, with 3 different modes(Normal, Rear Mode, Front Mode). 4 systems are:
1) Rear Parking sensors
2) Front parking sensors
3) Rear camera
4) Front camera
Inputs to circuit
a) Car reverse signal(triggered when car is put into reverse gear), 12v signal
Front camera output(signal coming from front camera), RCA composite
c) Rear Camera output(signal coming from rear camera), RCA composite
Outputs of circuit
d) Reversing sensors power(12v)
e) Front sensors power(12v)
f) Headunit Reverse signal(12v) - triggers headunit to display whatever is coming from camera input. If not on, headunit will NOT display camera input
g) Headunit camera input. RCA composite
Requirements:
Normal Mode
- Front camera OFF
- Front sensors OFF
- IF car is put into reverse,
- Rear camera ON
- Rear sensors ON
- All front(camera and sensors) OFF
Front Mode
- Front camera ON
- Front sensors ON
- IF car is put into reverse,
- Rear camera ON
- Rear sensors ON
- All front(camera and sensors) OFF
Rear Mode
- All front(camera and sensors) OFF
- Rear camera ON
- Rear sensors ON