TTL RGB ==> PC
cclist at sydex.com
Sat Nov 17 12:46:05 CST 2007
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.
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