At 09:59 AM 2/26/2003 -0500, you wrote:
> >               Vdd
> >                |
> >               .-.
> >               | |
> >             R1| |
> >               '-'
> >                |   R2_         _R3
> >                +--|___|----+--|___|-o  PIC  Schmidt trigger input pin
> >                |           |
> >             \  o           |
> >              \            ---
> >               \.          ---104 Ceramic
> >                o           |
> >                |
> >                |           |
> >               ===         ===
> >               GND         GND
> >
> >
> >         R1 24K
> >         R2 100K
> >         R3 1K
>
>The main time constant should be between R1 and C.

What do think is the advantage of having very asymmetrical time constants?

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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