[Coco] S-video Prospects...

[Boisy Pitre]

Congratulations John, this is great!   What a difference between the  
talkers and the doers!  The talkers just talk, but the doers go out  
and get things done!

Not to take away from Roy's great work on the VGA adapter, but S- 
Video offers a lot of possibilities as well.  I wonder if the picture  
would improve with some additional tweaks?  It would seem to me that  
a quality 19" or larger TV would provide one hell of a display for a  
CoCo 3.

Again, great work!

Boisy

On Jan 5, 2006, at 5:07 PM, John Kowalski wrote:

> Hi Everybody,
>
> Well, I went and ordered a sample of the AD724 chip and just  
> finished wiring
> the sucker up to the CoCo's RGB video.
>
> And...  it works.
>
> I haven't gone as far as comparing the output against my old RGB-to- 
> SVideo
> converter, but so far it looks pretty decent, although probably not  
> quite as
> pristine as from my old converter.
> 80 columns looks fine and is perfectly legible.  If anyone is  
> interested, I
> might try taking some more photos of the video output to give  
> people an idea
> of the quality.
>
> The circuit consists of:
> 1 x AD724 chip
> 1 x 3.57945 Mhz clock crystal
> 1 x 7805 (5V) voltage regulator
> 4 x 0.1 uF capacitors
> 3 x 220 uF capacitors
> 1 x 10 uF capacitor
> 1 x 82 pF capacitor
> 6 x 82 Ohm resistors
> 3 x 68 Ohm resistors
>
> + wires and connectors and a 2"x2" perf board.  Yes, the AD724 is  
> surface
> mount - it takes a special kind of patience to wire one up to a  
> perf board :)
>
> So, it works.  The big question for someone why may be looking into  
> building
> these things is being able to find a supplier who will sell these  
> chips in
> quantities of less than 100.
>
>                                          John Kowalski (Sock Master)
>                                          http://www.axess.com/ 
> twilight/sock/
>
>
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