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Old 03-07-2011, 06:08 PM   #1
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Default 12 volt TV / DVD players.

I'm not sure if this is the right section for this thread "Computers, Internet, Tech stuff", but I couldn't find a better place to put it.

In our Roadtrek, we have a nice LCD TV. Roadtrek also installed a DVD player. They are both powered by 120AC. Internally, much of the electronic equipment, runs on 12 volts DC. There is a transformer in the cabinet. Since our vehicles already have 12 volts, it just makes sense, not to invert 12 DC up to 120 AC, and back down to 12 DC. We loose power (as heat) in both of those conversions.

There are 12 volt DC LCD TV's, that even have the DVD played built in. This would allow us to eliminate one more piece of equipment, and open up a little more storage space.

Here is a link to a number of different sized 12 DC TV's.
http://www.12volt-travel.com/12-volt-te ... c-684.html

Here is a voltage converter, that can take a variable voltage (battery voltage), and output an even 12 volts. I don't know if this would be necessary, or if these TV's have something like this built into their cabinets.
http://www.trcelectronics.com/Meanwell/sd-50a-12.shtml

To connect this to the "Computer" part of the thread; many of these TV's have VGA/HDMI inputs, for use as a computer screen.

Has anyone here done anything like this, or considered it?
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Old 03-07-2011, 06:28 PM   #2
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Default Re: 12 volt TV / DVD players.

Quote:
Originally Posted by Photog
I'm not sure if this is the right section for this thread "Computers, Internet, Tech stuff", but I couldn't find a better place to put it.

In our Roadtrek, we have a nice LCD TV. Roadtrek also installed a DVD player. They are both powered by 120AC. Internally, much of the electronic equipment, runs on 12 volts DC. There is a transformer in the cabinet. Since our vehicles already have 12 volts, it just makes sense, not to invert 12 DC up to 120 AC, and back down to 12 DC. We loose power (as heat) in both of those conversions.

There are 12 volt DC LCD TV's, that even have the DVD played built in. This would allow us to eliminate one more piece of equipment, and open up a little more storage space.

Here is a link to a number of different sized 12 DC TV's.
http://www.12volt-travel.com/12-volt-te ... c-684.html

Here is a voltage converter, that can take a variable voltage (battery voltage), and output an even 12 volts. I don't know if this would be necessary, or if these TV's have something like this built into their cabinets.
http://www.trcelectronics.com/Meanwell/sd-50a-12.shtml

To connect this to the "Computer" part of the thread; many of these TV's have VGA/HDMI inputs, for use as a computer screen.

Has anyone here done anything like this, or considered it?
There is a very good and complete discussion of this topic here:

http://www.rv.net/forum/index.cfm/fu...pging/1/page/1

We did a conversion like you reference, and really like it. Ours is shown in the link a ways in.
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Old 03-13-2011, 12:26 AM   #3
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Default Re: 12 volt TV / DVD players.

Try these websites....
http://www.jensenrvdirect.com/
http://www.asaelectronics.com/
As far as I know they've been making 12V TVs and RV/Marine accessories for decades, and much of the stuff
they make is OEM stuff in many lines of RV, all classes and sizes. I looked into them 2 years ago, but because
they have very few physical retailers per se (except somewhere in Elkhart, IN), and I like to touch and see
the products before buying, I went with a 110-120AC Sharp from Best Buy Canada. Warranty and being able
to return the product in case of problems was another consideration.
Jensen/ASA Electronics have been around forever.
I also convert 12VDC to 110AC where necessary, using small portable inverters, and it has worked well for
me for over 2.5 years now.
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Old 03-13-2011, 01:07 AM   #4
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Default Re: 12 volt TV / DVD players.

Quote:
Originally Posted by Mike
Try these websites....
http://www.jensenrvdirect.com/
http://www.asaelectronics.com/
As far as I know they've been making 12V TVs and RV/Marine accessories for decades, and much of the stuff
they make is OEM stuff in many lines of RV, all classes and sizes. I looked into them 2 years ago, but because
they have very few physical retailers per se (except somewhere in Elkhart, IN), and I like to touch and see
the products before buying, I went with a 110-120AC Sharp from Best Buy Canada. Warranty and being able
to return the product in case of problems was another consideration.
Jensen/ASA Electronics have been around forever.
I also convert 12VDC to 110AC where necessary, using small portable inverters, and it has worked well for
me for over 2.5 years now.
We looked at all the 12v TV and DVD combos when we were deciding what to do (a couple of years ago). At the time, the 12 units were pretty low quality and targeted toward truckers who wanted basic entertainment. Poor picture quality and viewing angles were the norm. From what I have been reading lately, the newer 12v units are much better, in particular the Skyworth ones. They even make a LED version that is more energy efficient. I haven't seen them myself, however. They may be good option. If we could have found a very low power, good picture, TV/DVD, we would have gone that way, but unfortunately, none existed then, so we had to do a piece part version, which does work well though. For those of us that want to run on batteries for extended periods, low power drain is essential, and eliminated a lot of the contenders.
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Old 03-13-2011, 02:46 PM   #5
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Default Re: 12 volt TV / DVD players.

Quote:
Originally Posted by booster

We looked at all the 12v TV and DVD combos when we were deciding what to do (a couple of years ago). At the time, the 12 units were pretty low quality and targeted toward truckers who wanted basic entertainment. Poor picture quality and viewing angles were the norm. From what I have been reading lately, the newer 12v units are much better, in particular the Skyworth ones. They even make a LED version that is more energy efficient. I haven't seen them myself, however. They may be good option. If we could have found a very low power, good picture, TV/DVD, we would have gone that way, but unfortunately, none existed then, so we had to do a piece part version, which does work well though. For those of us that want to run on batteries for extended periods, low power drain is essential, and eliminated a lot of the contenders.
I understand all of that, I went through it as well, researched the various options ad infinitum, and
went with the best solution I could find at the time.
btw, I think I'd be wary of Skyworth, unless as you say, it's improved a lot. I recall reading some negative reviews
of it 2 years ago, just before I decided on the lower draw AC powered Sharp LCD HDTV option.
There may be better low draw options available in conventional AC powered TV/DVD combos is my point, I guess.
Good luck.
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Old 03-13-2011, 03:44 PM   #6
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Default Re: 12 volt TV / DVD players.

Quote:
Originally Posted by Mike

I understand all of that, I went through it as well, researched the various options ad infinitum, and
went with the best solution I could find at the time.
btw, I think I'd be wary of Skyworth, unless as you say, it's improved a lot. I recall reading some negative reviews
of it 2 years ago, just before I decided on the lower draw AC powered Sharp LCD HDTV option.
There may be better low draw options available in conventional AC powered TV/DVD combos is my point, I guess.
Good luck.
As it turns out, ours is a very low power use AC powered tv (Vizio), but it uses a "brick" converter and runs the tv on 12v, so we went direct 12v with a stabilizer. We pull less than 2 amps even with the standalone 12v DVD player in use.
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Old 03-13-2011, 04:10 PM   #7
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Default Re: 12 volt TV / DVD players.

Yours is a Vizio LED model? They (LED TVs) were just being talked about up here when I bought
my Sharp LCD HDTV. Even without the undoubtedly lower draw LED technology, our Sharp only
pulls around 4amps when I invert it off the coach batteries. We never need to worry about
drawing down our batteries by watching TV at that rate, including the other lightweight loads
like the Motorola DSR209 12VDC satellite receiver, but we're also usually pretty mobile so we
recharge fairly regularly. I could probably replenish the TV draw down with one 85W 4.5A solar
panel, if I ever get around to doing all of that "techy" stuff.
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Old 03-13-2011, 06:37 PM   #8
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Default Re: 12 volt TV / DVD players.

Yep, ours is a 19" LED model. They are very efficient and generate very little heat.
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Old 03-13-2011, 10:10 PM   #9
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Default Re: 12 volt TV / DVD players.

That's what I mean about best solution available at the time. There's probably a better solution than
LED technology, on a test bench in a lab somewhere. It'll be better than LED and even more efficient,
but that's the nature of the beast, forever changing and improving. Still, if we all waited for the perfect
answer in a perfect world, we'd still be watching the 13" CRT that Roadtrek put in them (mine at least).
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Old 06-05-2011, 03:03 PM   #10
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Default Re: 12 volt TV / DVD players.

Just stumbled across this thread, and it has been somewhat helpful.
We have just purchased a LTV Freedom 2B, that so far we are very happy with. However the PO removed the original 13" CRT and the original VHS player (not a big loss), the only thing he did leave on the van is a big ugly dome thing (visiontrac or tracvision) that I'm not sure what to do with!! Now we want to install a 13" - 15" flat screen with a DVD player (either a combo or separate)

The problem I'm having is that I know squat about TVs. Last one I bought was 25 years ago, and I still have it, as you can tell I'm not a big TV watcher, but thought we shouild get one for the RV if only to get local weather reports. After reading this thread it would appear that the best option would be to get a 12 Volt TV, however after that I'm lost, LCD, LED, HDTV etc don't mean anything to me, and trying to find a 12v unit locally is proving very frustrating.

Could someone point me in the right direction and advise where and what I should be looking for???

Thanks
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