[Coco] MC6847 + Component video

[Zippster]

That circuit won’t drive component inputs on a standard television properly.
I tried it on several quite a while back when I first started playing with the 6847.

You can get a good Luma only display from the Y portion of the circuit,
but the color difference signals are completely off as far as level.
They also aren’t terminated correctly.

Someone should work up a circuit for this though, component out would be worth
having.  I’d suggest using op-amps, ac coupling the signal into and out of the amp circuit.

- Ed




> On Apr 21, 2015, at 3:32 PM, Joe Grubbs <jsgrubbs at hotmail.com> wrote:
> 
> Suweet! Thanks!
> 
> 
> 
>> Date: Tue, 21 Apr 2015 16:15:52 -0400
>> From: linville at tuxdriver.com
>> To: coco at maltedmedia.com
>> Subject: Re: [Coco] MC6847 + Component video
>> 
>> On Tue, Apr 21, 2015 at 04:04:18PM -0400, Joe Grubbs wrote:
>>> The 6847 datasheet implies that one could connect it a monitor/television with component (Y-BY-RY) inputs via some kind of driver or buffer. Has anyone ever tried this? If so, is there a schematic for a driver/buffer that works well?
>> 
>> Daniel Campos has such a circuit.
>> 
>> https://twitter.com/RetroCanada76/status/299203476859260929/photo/1
>> 
>> -- 
>> John W. Linville		Someday the world will need a hero, and you
>> linville at tuxdriver.com			might be all we have.  Be ready.
>> 
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