Oops. Typo. That is a CD4010 non-inverting CMOS buffer. Not 4001.
-Richard
Richard Brewster wrote:
-Richard
Richard Brewster wrote:
> R1
> Switch
> ---/\/\/\/\/----
> +V | |
> | |\ 4001 |
> <-----o------| /o----------o OUT
> |/
> Gnd
>
> The switch is between +V and ground. The 4001 is a non-inverting
> buffer, powered by +V. Let the switch be centered. On power up OUT may
> be at ground or +V. Whichever it is, since it feeds back to the input
> through R1, it will stay put. If it's at ground, then a momentary flick
> of the switch to +V will cause the output to follow. The switch can
> remain at +V, bounce off the contact, or move back to center (no
> connection). OUT remains at +V. Nothing changes until the switch is
> moved back to GND. At that instant OUT becomes zero volts and will
> remain so, even if the switch is lifted (bounces). It is a simple
> flip-flop.
>
> Richard Brewster
>
>
> rafe127 wrote:
>
>> I guess it is about time I picked up the CMOS cookbook, I will order
>> it tomorrow.
>>
>> Explain to me, if you will, the basic premise of this kind of
>> debouncing. Will it still work for my purposes if the open and close
>> of the switch are as much as one second apart? I'm just curious what
>> the principle is.
>>
>> Thanks again,
>> Rafael
>>