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Zubinell
Joined: 10 Feb 2009
Posts: 39
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| Posted: Fri May 15, 2009 10:11 pm Post subject: Screen triggered by Barco BD808s |
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Has anyone figured a nice simple and reliable method to trigger a screen motor when turning on a Barco BD808s? I am considering using a relay with a low current trigger driven off of the power LED. Kinda hoping someone has found a simplier solution. Any ideas?
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Fri May 15, 2009 10:33 pm Post subject: |
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That's pretty much what you need to do. Runco puts in a little PC board on the SMPS and brings a jack out to the back of the set.
THe LED only has 1.7 volts on it or so, you probably need to get into the SMPS to tap into it.
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Zubinell
Joined: 10 Feb 2009
Posts: 39
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| Posted: Mon May 18, 2009 1:45 pm Post subject: |
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Thanks for the follow up Curt. I could dive a trigger relay with 2.5 volts which is what I was considering experimenting with and attempting to drive off of the LED. I will look at the SMPS suggestion and see if I can determine a new approach.
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jkruger
Joined: 24 Oct 2007
Posts: 2435
Location: Carlsbad, CA
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| Posted: Mon May 18, 2009 2:06 pm Post subject: |
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Mine has this in it.
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Zubinell
Joined: 10 Feb 2009
Posts: 39
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| Posted: Mon May 18, 2009 2:07 pm Post subject: |
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Gee, you got an extra?
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jkruger
Joined: 24 Oct 2007
Posts: 2435
Location: Carlsbad, CA
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| Posted: Mon May 18, 2009 2:08 pm Post subject: |
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I bet Curt does.
Runco put a little jack in the back of the pj.
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Zubinell
Joined: 10 Feb 2009
Posts: 39
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| Posted: Mon May 18, 2009 2:27 pm Post subject: |
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Curt, what would it take for me to get one?
Thanks
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon May 18, 2009 5:32 pm Post subject: |
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I should have a Runco SMPS here if you want to go that route. I think Runco simply tacks off the +17 volt line, and regulates the 17 volts down to 12, along with a protection resistor.
According to Runco, that board must be worth about $5K back when the set was new...
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perisoft
Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY
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| Posted: Tue May 19, 2009 11:21 am Post subject: |
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| Curt Palme wrote: | I should have a Runco SMPS here if you want to go that route. I think Runco simply tacks off the +17 volt line, and regulates the 17 volts down to 12, along with a protection resistor.
According to Runco, that board must be worth about $5K back when the set was new... |
That's one of those, "I'm in the wrong business" kinda things... 
I (based on a suggestion from here) got a 12-volt wall wart, and plugged it into the aux outlet on the back of my center channel receiver (I use a different receiver for center/front/rear/subs). Turn on the amp and the screen comes down. Ghetto, but it works!
_________________
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Zubinell
Joined: 10 Feb 2009
Posts: 39
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| Posted: Tue May 19, 2009 1:36 pm Post subject: |
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Wrong Business is right. My receiver is offers multi output on stereo which I use to pass through an aux amp for whole house audio and for audio for a 32" LCD as well. I considered doing such a set up as triggering the screen from some output on the receiver but then the screen would drop when using the whole house source. I really want it only when using the projector so I am working with the projector. Now I am dropping it with a wall switch. My prior screen was a pull down which was really just left down almost all of the time and I am amazed in the difference in "whiteness" between the new screen and my 6 year old pull down. Retracting the screen definitely preserves the white.
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