[sdiy] 4069 VCO to get started? My answer

[Richard Wentk]

At 11:43 05/10/2004 +0200, Nicolai Czempin wrote:
>Scott Gravenhorst wrote:
>
>>Richard Wentk <richard at skydancer.com> wrote:
>>
>>>Laurie Biddulph wrote:
>[..Snip...]
>
>All this info is very interesting, and it sounds really clever to use 
>something meant for digital in an analogue way. However, it does nothing 
>to make it simpler.
>Perhaps it is simpler to *build*, but not simpler to *understand*. I 
>should have been clearer on that point, I guess.

No, it's really is very simple.

Digital circuits are just analogue circuits used in a special way. It's all 
still about voltages and currents. There's nothing clever about using a 
digital circuit in an analogue way, because really it's *all* analogue.

The difference is that digital is simplified so you can build certain kinds 
of circuits without worrying exactly what those voltages and currents are 
doing. Digital includes a built-in fudge factor so everything gets rounded 
up or down to '1' or '0'. With analogue you need to be more precise. 
Internally though, both are made out of the same kinds of transistors and 
resistors and other basics.

Richard