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Thread: MiniTouch backup camera switching a little to fast!

  1. #1
    Variable Bitrate m2x0p9x's Avatar
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    MiniTouch backup camera switching a little to fast!

    I just hooked up my backup camera today with my MiniTouch. I have the camera powered by my reverse lights. Now if I dont need to reverse, I put the shifter in drive. Because naturally the shifter passes over reverse to get to drive, it engages the auto-backup and the screen switches to AV-2. But because it passes reverse so quick, the screen doesnt know to switch back to VGA. So at the moment I have to shift in to drive a little slow so it catches the ON/OFF state of reverse.

    Anyone have a fix? Is there somewhere else I can connect the camera too give the reverse signal that wont get triggered when going in to drive? The only thing I can think of, is buying an amp delay/pop eliminator to give it a slight delay so when power is giving the camera is already off and the auto-switch wont be made.

  2. #2
    MySQL Error soundman98's Avatar
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    i think delay like the 528t pulse timer would be the best/easiest option..

  3. #3
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    Quote Originally Posted by soundman98 View Post
    i think delay like the 528t pulse timer would be the best/easiest option..
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  4. #4
    Variable Bitrate m2x0p9x's Avatar
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    Dont have any experience with these. Can you give a little more info on how it works? I googled it, but all the product pages were vague. It says its trigger by a + , - , or state change. So I set it to 1 sec, it gets the reverse lights 12v signal, delays for 1 second, then allows the current to pass through? Ive been thinking about this a little more. Now will the timer hold the current and send it along at the designated time, or is it just a barrier of the current for "X" amount of seconds, and if there is still a signal at the time of delay it connects? Now if it stores the charge to send, I think im going to be in the same spot, just 1 second later. Lol. Maybe someone can explain a little more as I dont really know how these work.

  5. #5
    MySQL Error soundman98's Avatar
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    i have never used them but i feel i have a very good understanding of how they work...

    it doesn't store a charge, it just delays the connection-- like if you put a switch on the wire, and manually switched the screen to the reverse input-- this does the exact same thing, though it will perform the switch automatically.


    it is based on a 555 timer microchip-- if you have any experience with 555 chips, you could build it yourself if you wanted--there have been more then a couple of schematics posted on the interwebz.

    explanation of how it works:

    let say you set the delay to 10 seconds.

    what that means is that if you connect the black/white wire to ground, after 10 seconds, the relay will turn on.

    if you were to connect the black/white wire to ground, and then remove the wire from ground at the 9 second mark, the relay will not turn on.

    how this applies to you is that you would set the delay for a second or two-- long enough to allow you to normally switch gears. this would get the timer to ignore the 'blip' while you are switching gears to drive, but if you were to set the gearshift to reverse, would allow the signal to pass--although with a small delay..

    the biggest advantage of the 528t over other pre-built modules is that the relay is a single pole, double throw relay. meaning there is a normally-on pin, and a switched-on pin. many designs only include a single pole, single throw relay--which only includes a switched-on pin, so sometimes that can make it tougher to wire in certain circumstances..

    this is the manual i am using for reference:
    http://www.directedstore.com/manuals/528T.pdf


    for connecting, you basically connect red to +12v, black to ground, black/white to the tail light circuit switched ground(many systems are switched-ground, though, you might need to check with a volt-meter at the reverse lamp to double check this)

    for the other side of the connections, connect 'common, pin 30' to ground, and 'normally open, pin 87' to the mini touch reverse wire input.

    from there, you just need to adjust the delay to meet your needs.

  6. #6
    Variable Bitrate m2x0p9x's Avatar
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    Probably one of the best replies I have gotten on the forums. Everything I needed to know and detailed. Thanks.

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