[Coco] CoCo 2 Factory Composite Video RE'd

Zippster zippster278 at gmail.com
Sun Dec 14 21:28:13 EST 2014 

I’m using one with three RCA plugs that came with a video camera,
but I believe you are correct.

In fact I just dug out a standard headphone plug to RCA stereo cable
and it works just fine.

- Ed


> On Dec 14, 2014, at 8:05 PM, Chad H <chadbh74 at hotmail.com> wrote:
> 
> And, if I recall correctly, the wiring of those cables matches the very common RCA to 1/8" cord used to patch walkmans to receivers.  If so, that's great.
> 
> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Zippster
> Sent: Sunday, December 14, 2014 7:59 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] CoCo 2 Factory Composite Video RE'd
> 
> Yes.  
> 
> My guess is they decided to do it that way so they wouldn’t have to change the case.
> 
> - Ed
> 
> 
>> On Dec 14, 2014, at 7:51 PM, Chad H <chadbh74 at hotmail.com> wrote:
>> 
>> Ahhhh gotcha.  So the jack on the PCB is the 1/8" 3-conductor one?
>> 
>> -----Original Message-----
>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Zippster
>> Sent: Sunday, December 14, 2014 6:32 PM
>> To: CoCoList for Color Computer Enthusiasts
>> Subject: Re: [Coco] CoCo 2 Factory Composite Video RE'd
>> 
>> The board handles the audio as well.  The connector jack has 3 conductors, video, audio and ground.
>> The cable will have RCA plugs on one end and a 1/8” plug on the other.  You’ll sometimes see these for use with video cameras, etc.  A simple stereo headphone plug to RCA would work as well as you only have 2 signals, monaural sound and composite video.
>> 
>> It’s the same connector style found on the factory board.
>> 
>> - Ed
>> 
>> 
>>> On Dec 14, 2014, at 6:17 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-bo
>>>>>>> a
>>>>>>> rd-2
>>>>>>> <https://sites.google.com/site/thezippsterzone/coco2-composite-bo
>>>>>>> a
>>>>>>> rd-2>>
>>>>>>> 
>>>>>>> 
>>>>>>> - Ed
>>>>>>> 
>>>>>>> --
>>>>>>> Coco mailing list
>>>>>>> Coco at maltedmedia.com
>>>>>>> https://pairlist5.pair.net/mailman/listinfo/coco
>>>>>> 
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>>>>> 
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