[Coco] S-video Prospects...

[jdaggett at gate.net]

Stephen

One major problem with the AD72x series of chips is that they require RGB 
interlace signal. The Coco 3 is non-interlace RGB.

james

On 4 Jan 2006 at 4:18, Stephen H. Fischer wrote:

From:           	"Stephen H. Fischer" <SFischer1 at MindSpring.com>
To:             	"CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Subject:        	Re: [Coco] S-video Prospects...
Date sent:      	Wed, 4 Jan 2006 04:18:50 -0800
Organization:   	A. Nani Mouse Inx.
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> Hi,
> 
> The most important part, the AD72x needs to be obtained at a reasonable 
> cost.
> 
> No one has said they are going to do a buy or even at what price they might.
> 
> The $15 cost assumes a well stocked parts bin or access to a parts supply
> similiar to what I have had in the past here in Silicon Valley.
> 
> Most but not all stores have disappeared or are rapidly stocking only 
> Surface
> Mount stuff. They only buy what their customers have too many of and what
> they can sell to other customers. That today is SM.
> 
> Stores that remain:
> 
> Alltronics, Moved to far south of San Jose but I would make a trip just to 
> get out.
> 
> Haltronics: Still in the 5th place they have operating but speaking about 
> number 6.
> 
> Halted: Bought by Oracial and closed down for the tax write off. Was one of 
> the best.
> 
> ???? Name I cannot remember. Closed their Santa Clara store which was the 
> first place
> I would go for the parts for this project. San Jose Store still open but was 
> not as fully
> stocked as their Santa Clara store.
> 
> Anchor: Still open but very small showroom, not a good place for what we 
> need.
> 
> A few more, I have not checked lately as I have not been building anything.
> 
> Jameco: Mail Order is better than my walking in and then waiting for a hour.
> Appears to be the best place for the hobbist today.
> 
> Most of these have web pages.
> 
> Remember, we need only a few simple parts:
> 
> 1 x AD72x IC
> 1 x Surf Board
> 1 x small perf board
> some small wire
> 1 x Crystal or OSC
> Perhaps a S-Video Connector to mount in the back of the CoCo Case.
> 6 x 75 Ohm resistors
> 3 x 100 Ohm resistors for in the R, G and B lines from the CoCo.
> 
> 5 x .01 Caps
> 2 x 10  Caps
> 3 x 220  Caps
> 
> Maybe 2 x 10K Ohm Resistors
> 
> My interest is non - CoCo and requires an AD725, an AD724 being perhaps
> better for a CoCo project.
> 
> Those parts do not add up to $95. Most except for the IC and Surf Board
> I might may allready have in my parts bin.
> 
> Stephen H. Fischer
> 
> Chris Hawks wrote:
> > ---Reply to mail from Stephen H. Fischer about [Coco] S-video Prospects...
> >
> >> The $95 price is below Analog's > $125 price for their evaluation board
> >> but much higher than the ~ $15 that building your own would cost.
> >>
> >> BTY, I just used 3 resistors, one in each of the R, G and B lines to
> >> connect My CoCo 3
> >> to the AD723 Evaluation board for S-Video output to my RCA TV.
> >>
> >> Now, if his price was lower, it would be a fine CoCo 3 add on,
> >> even though he has too many unnecessary parts for our usage.
> >
> >    Cool! I'm glad someone has the time to work on it. I'll get in line
> > now.
> >
> > ---End reply
> >
> > Christopher R. Hawks
> > HAWKSoft
> 
> 
> 
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