Demodulated RF to Composite (Pocket TV Hack)

[jc0r]

Hi all

Bit of a strange project here, but i am trying to make a device that can demodulate the now defunct analogue UHF TV signal and convert it to composite to be used with a video transmitter such as http://www.hobbyking.co.uk/hobbykin...fy_2G4_800mW_16ch_2_4GHz_A_V_Transmitter.html

I already own one of these http://www.ambery.com/rfcotocoviau.html which does the job, however, i am trying to make the unit battery powered and as small as possible.

I have an old Casio pocket TV such as the one in this YouTube teardown video

This unit is ideal size and draws very little in the way of power. I am wondering if anyone knows if it would be possible to connect a Yellow composite lead to Casio's board to extract the demodulated video image to an external source?

Many thanks

 

[Martaine2005]

Hi jc0r,
I have several of these old pocket tv's. But mine also have a video out too.

As the video said, the ribbon cable to the lcd is probably where you want to look.
It will probably be just two contacts.a ground and the signal out. You would have to play with them to find out which is which.
Or search the net for a schematic or service manual for this tv.
Or possibly (not sure though) disconnect the ribbon cable. Hook up the ground connection. Then one by one with a jumper wire, connect ribbon to connector pin. It will be fiddly as they are very small but could work.

Martin