Universal WVI

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Universal WVI

Post by lexxion83 » Fri Jun 10, 2011 7:50 pm

Hello all,

I read a lot of post here and like the idea of converting systems to something that is portable. I got interested in the idea of Wireless Video Interface (Xbox 360 and PS3). I own Xbox 360 and was looking at techknott's creations (both Xbox 360 and PS3).

I did some planning and came to the conclusion that I do not have much time/tools/ skills (probably) to rewire lcd screen, controllers, power supply circuits, batteries etc. Plus I did not want to take things apart just in case I want them to be reused later. But I wanted to create a universal WVI the one with LCD screen, AV receiver that can run on battery and wall outlet.

After some research I came to the conclusion that it is possible to universal WVI with standard interconnection cables/adapters that you can just put it in the box without much rewiring or soldiering.

The things I choose are running on 12 VDC. The reason is that a lot of headrest LCD monitors are running on car battery voltage (12VDC) and a lot or power adapters / cables / av transmitters / batteries used for CCTV (security cameras) are running on 12VDC too. See the connection :)

Anyway, here is the list of parts:

1. LCD 7" HD Monitor
Model: CVTM-C79
The reason I chose that monitor is it HD for its size (800x480) in Pixels. I can barely see any pixels even when looking up close. It has 2 composite inputs (1 female / 1 male yellow cables). The power consumption is very low in about 7 Watts. It does not have speakers build in (as I want the longest battery life and it was my preferred choice for this project).

2. RC-305 Rx/Tx 5.8Ghz wireless AV transmitter/receiver
Model: AV 5.8Ghz Kit

The reason I chose this model is the portable size and very low power consumption. The av transmitter has composite input Yellow, white and green (red in standard cable). It can transmit all of them at the same time. It required some soldiering of composite chasis-mount rca plugs (yellow, white, red) as you will see in the pictures below. The receiver has 2 composite outputs. One can go to the 7" LCD monitor and at the same time you can hook it up to the big screen too. How nice is that :)

3. Power Supplies/Cables
a. 12VDC @ 1.5A power supply (this one is used with a power splitter cable to power both the LCD monitor and av receiver)
b. 12VDC @ 500mA power supply (used to power av transmitter)
c. One power splitter cable adapter
d. 2 power cable adapters
e. 2 RCA male to 3.5mm female adapter. This one is used for audio. I convert red/white to headphone jack.

4. Miscellaneous
a. RCA chasis-mount plugs . I bought these at radio shack.
b. Project box for transmitter. I bought this at radio shack.

5. Battery

This is the only thing I did not received yet. I ordered a 12VDC 6800mah Li-Ion battery (you can find them on ebay when you type that voltage and capacity). This battery is used for powering CCTV cameras. See the connection again :). So lets see how much battery life I will get out of this battery connected to 7" lcd screen and av receiver.

Battery capacity: 6800 mAh
7" LCD Scrren: 7 Watts ( Standard equation Current = Power / Voltage = 7 / 12 = about 600mA )
AV Receiver : about 200mA

So how many hours (in theory) = 6800mAh / (600mA + 200mA) = 6800 / 800 = about 8.5 hrs. I think i did this correctly.

Overall the system runs perfect right now. The video and audio are very good. I used headphones instead of speakers in order to hear anything. Speakers will drain additional 100-200mA from battery and I want to longest battery life possible. It is very much playable. The good thing about this I can use original controllers, with this system. I did not figure out the case yet. I might just integrate the whole screen into a case and have a kick stand or something or incorporate a hinge (shape of a portable DVD player) where the bottom will contain battery and av receiver and the flip screen. The av receiver runs a little bit hot but with proper ventilation it should not be a problem.

Right now I ordered a battery and it will come here in 2-3 weeks (as it is coming from china).

Some pictures for the proof :)

1. Overall Universal WVI Setup:
WVI Setup - Link

2. Modern Warfare 2 Screenshot 1(Xbox 360):
MW2 Pic 1 - Link

3. Modern Warfare 2 Screenshot 2(Xbox 360):
MW2 Pic 2 - Link

If you have any questions / comments please do not be afraid to ask :)


!!! Update !!!

I was finally able to complete my project :) . I got new battery (7.4V @ 6400mAh). I was able to include all the cables/plug converters in a box. I can run from battery, wall , or charge and run from wall at the same time. I also included a 25mm fan for cooling the wireless av receiver (it has separate ON/OFF switch). The range is pretty good at about 20-30 feet. It is really not meant to move as you get occasional blank screen as it looses the signal for like a second. BUT this one was not meant to move. If you leave it stationary there is no interference. The sound is provided through headphones. The paint used for boxes is Crylon Fusion - Flat Black.

The whole project was made in thought that I will be able to reuse the parts (if something breaks). There was no cables cut etc. Everything is pretty much intact :).

Video of my project in action:

Lexxion's Universal WVI Video

Here are pictures of final product:












Do NOT post screen-stretching images. -B6
Last edited by lexxion83 on Fri Jul 08, 2011 10:11 am, edited 2 times in total.

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Re: Universal WVI

Post by hailrazer » Sat Jun 11, 2011 1:34 pm

The battery you bought is complete and utter crap.

I have the 6800mAh and the 9800mAh ones.

They are actually 750mAh and 1200mAh batteries.

HK crap at it's finest.

You will be throwing those in the garbage and buying something else for sure.

It should be a dead giveaway that they are lying because there is no way to get an even 12v from Li-Ion cells. LOL
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Re: Universal WVI

Post by humakabula1 » Sun Jun 12, 2011 8:13 pm

they are the blue brick batteries, correct?
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Re: Universal WVI

Post by lexxion83 » Mon Jun 13, 2011 5:21 am

Yes, they are the blue brick ones. I figured they capacity will not be the one reported but maybe something close to it. If that is the case then I would run it of external power only. Not a big deal. I just bought an abs enclosure so I hope to integrate everything now.

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Re: Universal WVI

Post by lexxion83 » Sat Jun 18, 2011 8:59 am

I received the 12v 6800mAh battery and did the test on my setup. I got 1h 20min of run time. I did not expect it to be that low. I think the capacity of this battery is 1100mAh.

I also ran a test with 5 AA batteries (7.5v) and they are able to power my 7" HD Monitor and av wireless receiver :). So I will buy a nice 7.4V li-po battery pack that is quality.

There is still hope I can get about 4-5 hrs of run time.

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Re: Universal WVI

Post by lexxion83 » Fri Jul 08, 2011 10:13 am

I FINALLY finished my project :).

Please check out the video and pictures in my original post (I updated it).


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Re: Universal WVI

Post by mrkstinn » Wed Aug 03, 2011 9:23 am

great! already checked it. you are the man!

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