[Coco] CoCo 3 RGB to SCART video, then converted to HDMI

[Dave Philipsen]

If you have a problem with a circuit that just needs the sync signal(s) 
from a composite video source there is an inexpensive chip that will 
strip the sync for you.  It is an LM1881.

Dave Philipsen


On 4/30/2015 6:09 AM, Steven Hirsch wrote:
> On Thu, 30 Apr 2015, Barry Nelson wrote:
>
>> I have conducted an experiment and it worked! I wired the CoCo 3's 
>> RGB video lines from the connector on the bottom of the computer to 
>> the RGB lines in an SCART connector. I connected the audio from the 
>> CoCo connector to the left and right audio on the SCART connector. I 
>> connected the CoCo 3's composite video to the composite video/sync on 
>> the SCART connector and I connected +5V to a 100 ohm resistor 
>> connected to the "fast switching" pin on the SCART connector. I then 
>> plugged the SCART video connector into my SCART --> HDMI converter, 
>> which I plugged into my TV. Viola! Perfect RGB video up scaled to 1080P.
>
> From my experience with other classic machines, use of composite video 
> as composite sync for SCART is hit or miss.  Glad it worked out for you!
>
> Would love to see some photos of 80-column text mode.
>
>
>