Date   : Mon, 25 Feb 2002 14:22:07 +0000
From   : John Woodgate <jmw@...>
Subject: Re: Circuits involving a SAA5050?

I read in !bbc-micro that Kris Adcock <krisa@...> wrote (in
<001701c1bdf3$d4ad3bf0$c7eea8c0@...>) about '[BBC-Micro] Circuits
involving a SAA5050?', on Mon, 25 Feb 2002:
>Greetings earthlings,
>
>For several years now I've been maintaining a RiscPC system with a teletext
>decoder card in it. The card is being used to produce an 80x25 screen of
>text as a composite video signal. Now, I need to replace this card, mostly
>because the card has a TV tuner in it, and the property where the computer
>is based does not have a TV licence. So, I'm looking to build my own
>'serverely simplified' version of the card. Using an SAA5050 chip seems to
>be an obvious choice, so I was wondering if anyone on this mailing list has
>any experience using this chip, or has built anything similar. I'm pretty
>good at taking existing circuit diagrams and butchering them to my own evil
>ends, but not so hot on starting from scratch.
>
Can you not just disconnect the power supply to the TV tuner part?
Without the tuner oscillator going, the detector van will not react. 
-- 
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk 
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