Replies to This Discussion

ModeratorPermalink Reply by Hai Tran on March 4, 2012 at 9:40am

http://www.videoguys.com.au/Shop/p/24695/teradek-cube-250--1ch-hdmi...

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Permalink Reply by Gerry Mostert on March 4, 2012 at 1:03pm

Thanks Hai

Altough I think the price would be out of most people's reach, this downlink probably cost less than a 100 dollars to maufacture,

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Permalink Reply by Haidar Abu Bakar on March 4, 2012 at 11:57pm

Yes i totally agree. If is it just to preview what the camera see, then adding a cctv camera set to closely match the DSLR view is a cheap alternative.

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Permalink Reply by Gerry Mostert on March 5, 2012 at 12:47am

I think then it would be easier to convert HDMI signal to AV. Problem still not solved!

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Permalink Reply by Dave on March 5, 2012 at 6:37am

There are HDMI Senders on ebB*y for about 1/10 the price of the Teradek. 

For example: HDMI Sender / Receiver

There is also a direct-to-PC version: HDMI Sender / PC Stick

Unfortunately, I know nothing further about them.

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Permalink Reply by Gerry Mostert on March 5, 2012 at 6:46am

Looks like a nice device for the home but the operating distance is only about 30 metres.

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Permalink Reply by Dave on March 5, 2012 at 6:53am

Yes, that's a bit feeble.  Says output is 12 dBm or about 15 mW.

Perhaps they'd be hackable for the installation of a better, external antenna?

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Permalink Reply by Gerry Mostert on March 5, 2012 at 9:08am

I'm not very good at hacking things, prefer buying an off the shelf item that works.

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Permalink Reply by Gerrit Jan Baarda on March 5, 2012 at 9:35am

What about this and then feed the A/V into a standard FPV transmitter?

According to someone in the MK forums, it runs on 5V, and if you remove the unneeded connectors and box, it should be about 50 gr..

I don´t have one myself, but at that price it might be worth taking the risk....

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Permalink Reply by Mike M on March 5, 2012 at 4:08pm

What is the purpose of sending HDMI signal to the ground? Is it just for camera sighting, or do you want realtime HD (I didn't think most DSLRs supported live HD monitoring) video monitoring? If it's just to control what your camera is pointing at, just use a cheap FPV setup that includes a tiny camera that weighs nothing like the $70US unit below. Several professional camera gimbals have these mounted on the side of the gimbal so they can support any camera the copter can lift.

http://www.hobbyking.com/hobbyking/store/__21327__900MHZ_200mW_Tx_R...

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Permalink Reply by Gerry Mostert on March 6, 2012 at 2:01am

Hi Mike,

I think we are talking about serious aerial video and photography here, well that was my intrention when I started this discussion.......

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Permalink Reply by Mike M on March 6, 2012 at 8:49am

I guess I don't understand what you mean by serious video. The kit I referred above is just for sighting a camera that does not have it's own composite video out. The transmitter is a 200mW device, that weighs nothing (25g), which translates to you having MORE payload and MORE Amp hours available for whichever camera you decide to use. If you try to get HDMI to the ground, it will cost you a lot more power and weight and therefore reduce the amount of time and payload you can use for the actual work of filming.

-Mike

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