[Coco] CoCo 2 Factory Composite Video RE'd

[Tom Seagrove]

I will open it up tonight and get some pictures...


On Dec 15, 2014, at 8:07 AM, Kip Koon <computerdoc at sc.rr.com> wrote:

Tom,
What kind 512KB PCB is in your Coco 2?

Kip Koon
computerdoc at sc.rr.com
http://www.cocopedia.com/wiki/index.php/Kip_Koon



-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Tom Seagrove
Sent: Sunday, December 14, 2014 7:31 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] CoCo 2 Factory Composite Video RE'd

I have a CoCo 2 someone modded with a similar board installed. It has 2 RCA cables coming out the back for audio and video.  There is also a switch on the front to turn on and off 512K memory.  A non standard keyboard is installed as well.

Tom


On Dec 14, 2014, at 7:17 PM, Chad H <chadbh74 at hotmail.com> wrote:

Hey, im curius, I know my RF on my CoCo 2 provides audio as well..but this is done away with on the mod...so what provides audio?  I dont remember composite video doing that.  I remember using seperaye red/white RCA patches for L/R audio channels when doing this with old VCR's and DVD players.
Sent from my Galaxy S4

-------- Original Message --------
From: Zippster <zippster278 at gmail.com>
Sent: Sunday, December 14, 2014 11:10 AM
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Subject: Re: [Coco] CoCo 2 Factory Composite Video RE'd

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-boar
>>>> d-2 
>>>> <https://sites.google.com/site/thezippsterzone/coco2-composite-boar
>>>> d-2>>
>>>> 
>>>> 
>>>> - Ed
>>>> 
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>>> 
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>> 
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