Solved(?) - 2 sources / 1 input

"nFamousCJ - Keeper of Stringbean, Gengars and a Deezul" (nfamouscj) 10/14/2019 at 20:01 • Filed to: None

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My head unit only has one video input. The 250 now has a camera on each license plate (guessing where the front end really is is tricky being far and tall). The cameras are standard rca and I’m hoping to use a toggle to switch between front and rear. They’re externally powered down stream.

facw > nFamousCJ - Keeper of Stringbean, Gengars and a Deezul 10/14/2019 at 20:18

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Seems like it could work.

Potentially cheaper and easier to just get something like this for $6.50 :

https://www.amazon.com/Splitter-3-Input-1-Output-Connecting-Devices/dp/B07WHFQFS3

I’ll admit that’s an ugly solution and somewhat bulky solution, but there might be other things out there, this was the first I saw.

nFamousCJ - Keeper of Stringbean, Gengars and a Deezul > facw 10/14/2019 at 20:23

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That was the initial route but it's size and only needing the video. Plus my route it's a single hole drilled, not sure how to access that switch easily. But ultimately I took the idea of that thing and tried to figure out whats inside it. 

MM54 > nFamousCJ - Keeper of Stringbean, Gengars and a Deezul 10/14/2019 at 20:42

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Your sketch is aesthetically pleasing, and the circuit should work. Noise intro duced to the signal from the switch will be non-zero but it shouldn’t be bad, especially just for use as a back-up (and I guess front) parking camera.

VincentMalamute-Kim > nFamousCJ - Keeper of Stringbean, Gengars and a Deezul 10/14/2019 at 20:43

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Glad you posted this. I’ve been thinking of multiple cameras in my windowless cargo Transit.

Video signals will travel OK through a standard DPDT switch?

What is the front license plate camera for?

What are the RCA plug/sockets called?

nFamousCJ - Keeper of Stringbean, Gengars and a Deezul > MM54 10/14/2019 at 20:57

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Im hoping using twisted cabling should help with noise, but you're right the big decider will be the switch. And you're correct on their function. 

FTTOHG Has Moved to https://opposite-lock.com > nFamousCJ - Keeper of Stringbean, Gengars and a Deezul 10/15/2019 at 01:28

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This should do the trick: https://www.bhphotovideo.com/c/product/703119-REG/Ocean_Matrix_OMX_VIDEO_AB_OMX_VIDEO_AB_Composite_Video_RCA.html

It’s smaller than the bulky  AV switchers that pass audio too and appears to have a quality switch.  It’s small enough to just Velcro to the top of the dash. The switch doesn’t appear to have enough thread to mount though the dash but you could probably pop the box open and see if there is more hiding inside.  

FTTOHG Has Moved to https://opposite-lock.com > nFamousCJ - Keeper of Stringbean, Gengars and a Deezul 10/15/2019 at 01:53

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I’d use coax like RG59 if I was going the DIY switch route and get solder-on connectors as well as solder the switch.  It’s a little more work but will minimize noise and should hold up better long term.

nFamousCJ - Keeper of Stringbean, Gengars and a Deezul > FTTOHG Has Moved to https://opposite-lock.com 10/15/2019 at 08:01

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Thats not a bad idea and mounting could get creative to hide it just enough. I'm only $12 invested so far so I'll try the DIY method and see how the noise is and keep this as my backup plan. 

nFamousCJ - Keeper of Stringbean, Gengars and a Deezul > VincentMalamute-Kim 10/15/2019 at 08:03

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Im guessing they will be this is an experimental setup.

Front camera is so I don’t keep parking multiple feet from the vehicle in front of me in a parking lot (I normally park way out in the open but have to park in a close spot.)

Those are screw terminal rca connectors 

VincentMalamute-Kim > nFamousCJ - Keeper of Stringbean, Gengars and a Deezul 10/15/2019 at 11:04

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Thanks.

Curious to see how much video noise you get.

I see o thers think it’s doable although you’ll have some noise.