How to get composite video output from OV7670 Image Sensor?

Other Hardware Sensors
1

I want to make an FPV setup for my robot. The camera module is OV7670. I want to send the video feed wirelessly and receive it on another arduino on an LCD screen. While this is not possible with an arduino UNO (which is all I have!), I wanted to to convert the digital video signal inputted to arduino UNO from module to composite video signal which can then be hooked to an analog RF TV transmitter (which I have!) and received on a T.V. with just an antenna. Can someone please help me with this?

PS:- I have already looked at https://www.sparkfun.com/products/11745 which outputs RCA signal directly, but I am looking for alternatives as this is costly.

2

You don't need an arduino to do this.
You take a parallel D/A chip and put it on the video output. This gives you the video signal.
You then take the VSYNC and HSYNC and mix it with gates to get a composite sync output, as shown here:-
http://www.epanorama.net/circuits/vga2rgbs.html

Then you add together your sync and video as shown here:-
http://www.nbtv.wyenet.co.uk/cammonsync.htm

3

There are also modules who has composite out like this one

http://www.ebay.it/itm/CMOS-420TVL-CCTV-Camera-w-3-6mm-Lens-CMOS-1030-PCB-Home-Security-Camera-for-DIY-/111404367004?pt=US_Security_Cameras&hash=item19f037bc9c