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Author Topic: video  (Read 2210 times)

colin-stevens

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video
« on: March 24, 2007, 08:03:31 PM »

wondering about putting some kind of camera into a sub. so, help. what system would work? can i transmit to a shore based receiver or do i put some kind of recorder in the sub? bit of a luddite. catn make sense of modern technology, or more to the point the terminology.So can someone help with an idiots manual on what is needed and what to do?Hve seen various bits here and sup pirates. now cant find them.
cheers guys
colin
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Mankster

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Re: video
« Reply #1 on: March 24, 2007, 08:41:04 PM »

johno 52-11

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Re: video
« Reply #2 on: March 24, 2007, 09:52:47 PM »

I have helped a friend fit 2 cameras in a Severn Class lifeboat with a 7" screen on top of the transmitter you can see it here http://www.modelboatmayhem.co.uk/Shows2007/Lemington-2006/images/INMBS2006-574.JPG
The setup is 2 wired cameras that have the power switched by a control on the transmitter one looks forward and one looks aft.
Both video feeds are connected together and wired into a video transmitter with the receiver mounted under the R/C transmitter.
The AV transmitter/receiver came from ebay. The main reason for the separate unit is that it is more powerful than the combined camera/transmitter we can get a range of about 500 meters without picture loss.
 You can see some of the results on our website http://www.lifeboatmodels.co.uk/severnvideoclips.htm the only downside with the setup is you need a battery belt to power the screen and receiver.
 If you want to record the output look for an mp4 recorder that is what we use as you can upload from it straight onto your computer.
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kendalboatsman

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Re: video
« Reply #3 on: March 24, 2007, 09:54:32 PM »

A few years back I purchased from Ebay a mini Colour CCD camera with wireless transmitter. The receiver plugs into a video. Only trouble I had was interference over a distance, but suspect the house played a part in that as we get poor phone signals indoors. Picture quality was good, not sure how much space you have in the sub but the transmitter module is the size of 3 or 4 credit cards stacked up. The camera is very small as well. It used PP3 9v batteries to power it.

It looks like they have updated it and combined camera and transmitter to make it smaller, see here http://cgi.ebay.co.uk/New-Wireless-Mini-Color-Video-CCTV-Camera_W0QQitemZ140100322092QQcategoryZ48632QQrdZ1QQcmdZViewItem

Hope that helps

Clive :)
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tigertiger

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Re: video
« Reply #4 on: March 25, 2007, 07:05:13 AM »

Johno

this sounds interesting, can you give more details please.

I may wish to copy what you have done.
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johno 52-11

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Re: video
« Reply #5 on: March 25, 2007, 10:22:25 AM »

Johno

this sounds interesting, can you give more details please.

I may wish to copy what you have done.

The av Trans/recv is from ebay search cctv 2w and you get this http://cgi.ebay.co.uk/4chs-Digital-CCTV-Camera-2-4G-2W-Transmitter-Receiver_W0QQitemZ160099115098QQcategoryZ71482QQssPageNameZWDVWQQrdZ1QQcmdZViewItem as its 2w its more powerful than the combined units which are only 100 or 200mw. I have seen some that are 2.5w but don't know anything about them.

The screen came from Maplin you can see it here without the R/C Transmitter on the mounting.http://www.modelboatmayhem.co.uk/Shows/Warwick_2005/images/Warwick2005-033.JPG The arms on the side are for a shoulder harness as it gets a bit heavy to hand around the neck.

To switch between cameras both have their outputs connected to the av transmitter on the power is switched with a 3 way r/c switch so only the camera with power provides the picture.

Hope this helps

John

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tigertiger

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Re: video
« Reply #6 on: March 25, 2007, 11:36:32 AM »

Thanks Johno
i think I got it now.

TT
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Turbulent

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Re: video
« Reply #7 on: March 25, 2007, 04:56:50 PM »

I've just bought a mini "Spy" camera from Ebay for 20 quid, I'm not sure what to fit it to yet, but it's small enough to go into the sail of my Alpha or my trafalgar they also sell one with a built in screen for 60.00.

http://stores.ebay.co.uk/tobamax-store_W0QQsspagenameZL2222QQtZkm

Mankster

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Re: video
« Reply #8 on: March 25, 2007, 09:02:05 PM »

2.4 GHz won't work at all well, with the antennae under water no matter how powerfull the transmitter. So its best to to routhe the antennae through the periscope to keep it abopve the water. Other frequencies (especially lower) work much better, I have got a signal from 3 foot, but may not be legal in the UK.
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