[Coco] CoCo 2 Factory Composite Video RE'd

[Zippster]

The color mode on this board is pretty darn good even on a large LCD TV.
The B&W mode is super clear on the same TV.

I added a couple of pics of the output on a 46” LCD TV.
Of course on a CRT it’s perfect, But this pretty darn good for composite on a big LCD.

Not the best pics, but gives you an idea.

<https://sites.google.com/site/thezippsterzone/coco2-composite-board-2 <https://sites.google.com/site/thezippsterzone/coco2-composite-board-2>>

- Ed


> On Dec 14, 2014, at 9:39 AM, David Ladd <dladd at realmspire.com> wrote:
> 
> Zippster, Thank you :D  The HD TV's that my family has and the one I
> personally own the tuners still support analog as well as the ATSC
> digital.  The thing is the green is super over powering and can't
> hardly read the black text lol.  So I figure the composit might be
> better :D  Plus this would allow me to use the Playstation One's
> composit monitor too or a car backup camera display panel :D
> --
> David Ladd
> --
> 
> 
> 
> On Sun, Dec 14, 2014 at 9:03 AM, Zippster <zippster278 at gmail.com> wrote:
>> Hi David,
>> 
>> I can definitely do that.  :)
>> 
>> - Ed
>> 
>>> On Dec 14, 2014, at 1:24 AM, David Ladd <dladd at realmspire.com> wrote:
>>> 
>>> You know you should sell these boards for those of us who have CoCo2's
>>> that don't want to build their own :D  I would love to have a Composit
>>> replacement for the RF modulator. :D  *hint hint*
>>> 
>>> 
>>> --
>>> David Ladd
>>> --
>>> 
>>> 
>>> 
>>> On Sat, Dec 13, 2014 at 11:27 PM, Zippster <zippster278 at gmail.com> wrote:
>>>> Hi Everybody,
>>>> 
>>>> I’ve successfully reverse-engineered the factory composite board found in
>>>> a CoCo 2 I purchased on ebay.  This board is a direct replacement for the RF modulator.
>>>> It requires no modifications to the case, and uses the channel switch to select B&W or COLOR.
>>>> 
>>>> It seems to have very good output - I’d say better than the reference circuit from the 6847 data sheet.
>>>> It’s a more involved circuit with voltage regulators on-board and is AC coupled.
>>>> 
>>>> Pics of the factory and re’d prototype can be seen here for those who are interested.
>>>> 
>>>> <https://sites.google.com/site/thezippsterzone/coco2-composite-board-2 <https://sites.google.com/site/thezippsterzone/coco2-composite-board-2>>
>>>> 
>>>> 
>>>> - Ed
>>>> 
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>>> 
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