[Coco] PICs and S-Video

[Chris Hawks]

---Reply to mail from John Kowalski about [Coco] PICs and S-Video
[...]
> It was a bit fiddly to figure out all the values for the resistors and
> capacitors - I had to use an oscilloscope to get all the timing and trigger
> input levels right.  The two trigger inputs in particular need to be R/C
> filtered just right so that the 556 will only trigger on the lowest 'spike'
> and not the full duration of lows.
> 
> I figure I'll move the (mess of wires) circuit onto the RGB-to-SVideo board
> itself over the weekend and jot down a diagram of the wiring and components
> and email it to you.  (Parts are one LM556CN, 5 capacitors and 6 resistors -
> plus optional trimmers if you want to be able to adjust the delay time
> and/or pulse width.)

    GREAT! I was going to do that this weekend. I haven't seen my scope in
years and don't remember getting rid of it. 

---End reply

Christopher R. Hawks
HAWKSoft
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