[Coco] PICs and S-Video

[Mark Marlette]

If all of those parts are just to provide an inversion for the delay. 
I would go with the inverter. You can get 4 pin devices, SMT, won't 
even know they are there. Last time I looked they were around $0.14 
each. R/C are around $0.01. Total them cost is about the same...Where 
you will save time is in assembly.

Mark



At 2/24/2006 07:37 PM, you wrote:

>---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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