[Coco] *COOL* Look what I found! (VideoMod for CoCo2)

[Fedor Steeman]

Hi all,
Well, there is definitely a little board to be added, but I do not know the
technical jargon for this technique. Of the modified CoCo2 I possess that
has this videomod, I added a range of pictures to my gallery on
coco3.comfor the interested to peek at:

http://coco3.com/modules.php?name=Gallery&g2_itemId=1483
<http://coco3.com/modules.php?name=Gallery&g2_itemId=1483>

Cheers,
Fedor

PS: Nobody interested in the SCART connector? :-(

2009/1/8 N8WQ <exwn8jef at gmail.com>

> Hi George,
> The last time I looked the Color Computer (1, 2, or 3) didn't have any
> surface mount components. LOL
> The circuit has 22 parts, which includes one variable capacitor and one
> potentiometer.
> If you look on page one you can read "SMD technick."
> He clearly shows the circuit raised on top of the rf video modulator.
>
> Alan Jones
>
> --
> N8WQ - Canal Winchester, Ohio
> http://exwn8jef.googlepages.com/home
> http://n8wq.blogspot.com
>
>
>
> George Ramsower wrote:
>
>>
>> ----- Original Message ----- From: "N8WQ"
>>
>>  Hi Fedor,
>>> That looks like a SMT (surface mount) component layout. A SMT pc board
>>> would have to be made or you could use what us home brewer's call "manhattan
>>> style" construction. Or we could translate the project to "through hole"
>>> components. It would be nice to see the schematic though. LOL
>>> The BSR14 is a NPN general purpose amplifier.
>>>
>>> Alan Jones
>>>
>>
>> He's showing where on the RF modulator to make connections. The ckt he
>> built only has about three or four parts on it.
>> Usually this mod only require a transistor to invert and amplify the video
>> that goes into the modulator.
>> Although I can't read what he's said, it looks to me to be an installation
>> guide for the little ckt. This is probably why there's no schematic of the
>> actual ckt.
>>
>> George
>>
>>>
>>>
>>>
>>> Fedor Steeman wrote:
>>>
>>>> Hi all,
>>>>
>>>> While going through the huge lot of copied CoCo Manuals I inherited from
>>>> Michel Collette, a former Dutch CoCo-society regional coordinator, I
>>>> discovered the following schematics for making a video buffer mod for
>>>> the CoCo2, enabling a CoCo2 to be coupled up any television or video
>>>> equipment with a composite video input:
>>>>
>>>> http://www.steeman.dk/CoCoManuals/VideoMod_(KoenVaartjes).pdf
>>>>
>>>> How cool is that!?
>>>>
>>>> It is all in Dutch, written by someone called Koen Vaartjes, but if
>>>> people
>>>> are interested I could translate, clean it up, perhaps redo the
>>>> schematics
>>>> in a graphics editor and put it up on a webpage!
>>>>
>>>> Some of the equipment i inherited from Michel Collette actually included
>>>> a
>>>> CoCo2 with this video mod. I tried it out when I first discovered it and
>>>> it
>>>> worked flawlessly then. After having transported the CoCo one time,
>>>> however,
>>>> something went wrong, because after that all I got was a black screen
>>>> and no
>>>> sound. I believe there must be a loose contact somewhere, because every
>>>> now
>>>> and then when I try it, it works again.
>>>>
>>>> The final page looks like a schematic of a scart cable (
>>>> http://en.wikipedia.org/wiki/Scart) that is widely used in Europe at
>>>> least.
>>>> I do also have a modified SCART cable that can be used to hook up the
>>>> RGB-output of a CoCo 3 to a normal television with a scart input. That
>>>> too
>>>> once worked, but not anymore. Maybe if someone could help me understand
>>>> the
>>>> schematic, and figure out what wires of a RGB-cable should be connected
>>>> to
>>>> what pin of the scart, I could try to fix the cable or make a few more
>>>> for
>>>> anyone interested... This would mean that a CoCo3 could be connected
>>>> from
>>>> the RGB output directly to a television with scart input.
>>>>
>>>> Cheers,
>>>>
>>>> Fedor
>>>>
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>>>>
>>>>
>>>>
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