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Thread: Rearview camera

  1. #1
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    Rearview camera

    Hi. My carputer is now installed, the LCD screen is mounted, WLAN card is installed and my GPS is in the mail. Now I am wondering about my rearview camera. How can I make this work? I want the camera to fill the whole screen when I put the car in reverse and then get back to it's original screen when the car is put out of reverse. To do this I have to connect a cable from my reverse-lights which will give the signal, and I need some kind of software to recieve this signal. What do I need?

  2. #2
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    Depends on how you want to input the signal to the screen. If you are you directly inputing the rearview signal to the screen, you will need some sort of leading/trailing pulse generator to trigger the input button to switch from vga to rca. If you are using a video capture card, I recommend taking a look at using a fusion brain.

  3. #3
    Who am I? HiJackZX1's Avatar
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    Quote Originally Posted by Plecto View Post
    Hi. My carputer is now installed, the LCD screen is mounted, WLAN card is installed and my GPS is in the mail. Now I am wondering about my rearview camera. How can I make this work? I want the camera to fill the whole screen when I put the car in reverse and then get back to it's original screen when the car is put out of reverse. To do this I have to connect a cable from my reverse-lights which will give the signal, and I need some kind of software to recieve this signal. What do I need?
    It all depends on what screen have. Some LCDs come with a special wire that you connect to the reverse bulb. When you go into reverse, the bulb turns on, and automatically switches to the A/V 1 or 2 on the screen. Then when it turns off, it goes back to last state.
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  4. #4
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    HiJackZX is correct. Some LCDs have the hardware switching solution built in by default. I have a lilliput, which unfortunately doesnt have that feature.

  5. #5
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    Hmm... what about a relay? The relay is triggered by the reverselights. Kompositt only has two leading cables, right? In that case I just have to cut one of them to stop the video information from reaching the screen? But then again, the screen have to overrule the VGA input when there is a kompositt input present, don't know how that would work actually.

    What's a fusion brain?

  6. #6
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    My LCD screen doesnt have a rearview camera option. So how do I do this? Isnt there any kind of PCI card that you can plug different 12V devices to?

  7. #7
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    Does your screen accept multiple inputs (rca, vga, ...) or just one?

  8. #8
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    It has VGA, S-video and compositt (RCA).

  9. #9
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    Ill post more once I get back to my notes (away on business right now). Essentially what needs to be created is a circuit that will simulate the "video source" button's being pressed both when the car is put into and taken out of reverse. The way I am going to do this is using a leading/trailing edge trigger on the reverse lights to pulse a relay. I will give you the specifics once I return to my garage.

  10. #10
    Maximum Bitrate bes51659's Avatar
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    Most have been said, but I summarize. Correct me if I am wrong:

    1) Some Panels has to be controlled by selecting AV with a button press.
    In this case you will need to modify your hardware to get it automatic. I guess fusion brain is one way. Depending on how the buttons operate. Fusion brain has not got isolated output that might be required (= need for relay or bilateral switch like DG441) From spec it has not got open collector outputs either so I would not use it without glue electronics. (I think an absolute max rating of 17[V] powersupply is unsufficient too...)

    2) Some Panels will detect AV present (= camera on) and switch automatically from VGA to AV. Xenarc, and Lilliput if special sequence of buttons are pressed on remote. See this post and search forum.

    In this case you connect the camera power to rear light. You might see some warming up effects. (I am not sure if it can be switched in if VGA is off)

    3) Some Panels has a "rearview" wire input.

    In this case you connect rearview light to this input.

    ***************

    My system is a system 3. A CID-650.

    I noticed that if the rearview input was made active without having VGA on first, the panel would not enable VGA without selecting VGA again with the buttons when rearview was turned off. This was bad for me as I wanted the system to be totally automatic. No buttons at all!

    I thought I'd just mentioned that this is a possible problem depending on your setup. If you are interested in how I solved it check link in signature. I also wanted a delayed off ;-)

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