TTL RGB ==> PC

[Chuck Guzis]

On 17 Nov 2007 at 10:22, Gordon JC Pearce wrote:

> >From memory, and it was a while ago, we had three voltage dividers to
> knock the TTL outputs down to .7v, and then three more resistors from
> the intensity bit to the analogue outputs.
> 
> There may have been some diodes there.
> 
> The sync combiner was a couple of resistors and a transistor.

It can also be done with a 74LS06 OC inverter and a few resistors.  A 
fancy version might use a '221 one shot to adjust sync pulse position 
and width.  I think the one I used to drive an RGB monitor with SOG 
from a VGA output used a 74HC86 XOR and was self-powered.

Cheers,
Chuck