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how clean is power through a relay?


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spyderbyte 
Member - Posts: 25
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Joined: February 27, 2007
Location: United States
Posted: February 27, 2007 at 9:34 PM / IP Logged  
It looks like integrating reverse cameras is a common topic on here.
I was considering a set up like this one, splicing my reverse lights for pin 86 to trigger.
How much noise will the relay introduce into the system?
Are there inexpensive AV switchers that can be triggered by a remote wire to use instead?
Thanks!
Spyderbyte
hotwaterwizard 
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Posted: February 28, 2007 at 7:56 AM / IP Logged  
It would be better to get a VW relay with a Metal Case and ground the case to ground with a metal hose clamp and an L bracket.. The metal case will shield the Relay and it will not pick up Alternator interfearance.
John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
hotwaterwizard 
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Posted: February 28, 2007 at 8:08 AM / IP Logged  

Crutchfield has a switcher for Automotive use.

http://www.crutchfield.com/S-1dbHCTGSW6n/cgi-bin/ProdView.asp?g=81600&I=469MPSS4

how clean is power through a relay? -- posted image.

John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
spyderbyte 
Member - Posts: 25
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Joined: February 27, 2007
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Posted: February 28, 2007 at 3:36 PM / IP Logged  
hotwaterwizard wrote:
It would be better to get a VW relay with a Metal Case and ground the case to ground with a metal hose clamp and an L bracket.. The metal case will shield the Relay and it will not pick up Alternator interfearance.
Will this be enough to keep the signal clean? The relay itself won't introduce any interference or dropped signals?
hotwaterwizard wrote:

Crutchfield has a switcher for Automotive use.

Would I be able to run video signals through that instead? To clarify, I'm only looking to switch video sources, audio will be continuous. I'm really just searching for a fancy 5 pin relay (if I even need fancy).
Thanks!
Spyderbyte
hotwaterwizard 
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Posted: March 01, 2007 at 8:38 AM / IP Logged  

There is one way to find out.

When in doubt, try it out !

John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
spyderbyte 
Member - Posts: 25
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Joined: February 27, 2007
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Posted: March 01, 2007 at 3:18 PM / IP Logged  
hotwaterwizard wrote:

When in doubt, try it out !

I would if I currently had any of the other components of my planned set up. I'd much rather find out if something isn't possible BEFORE I jump head first into another fairly ambitious (and reasonably spendy) project.
Spyderbyte
KPierson 
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Location: Ohio, United States
Posted: March 01, 2007 at 3:36 PM / IP Logged  
I'm using an industrial 12 4pdt relay to switch between my OEM navi and my laptop display and I'm not getting any noise.  The only noise you need to worry about the relay adding is when it clicks on and off.  As long as the voltage is stable across the coil noise should't be an issue, or at least it isn't in my case.
Kevin Pierson
spyderbyte 
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Posted: March 01, 2007 at 4:15 PM / IP Logged  
4pdt? Are you running s-video cables?
I like the news though, where did you get this relay?
Thanks!
Spyderbyte
hotwaterwizard 
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Posted: March 01, 2007 at 10:09 PM / IP Logged  
spyderbyte
What kind of connection do you need?
RCA
BNC
 S
 
A relay is what $10 and a Double ended Female RCA what $5
Hmm $15 sounds like a fairly ambitious (and reasonably spendy) project.
John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
spyderbyte 
Member - Posts: 25
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Joined: February 27, 2007
Location: United States
Posted: March 02, 2007 at 12:00 AM / IP Logged  
hotwaterwizard wrote:
What kind of connection do you need?
Component video. I only mentioned s-video because KPierson's 4pdt relay seemed like overkill.
hotwaterwizard wrote:
A relay is what $10 and a Double ended Female RCA what $5
Hmm $15 sounds like a fairly ambitious (and reasonably spendy) project.
I was referring to the media player, camera, and screen I was planning to hook up through this relay. I want to make sure I'll have good video quality before I purchase everything.
Therefore I can't "try it out" and am looking for people who have.
Thanks
Spyderbyte
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