Re: [CAD_CAM_EDM_DRO] Converting Heidenhain Scale to sq wave

In a message dated 19-Aug-02 19:27:14 Central Daylight Time,
bdrmachine@... writes:

> Question: Has anyone converted this signal to 5 volt TTL levels?
> If so please share the circuit diagram with me. If not (after I
> reinvent the wheel) I will follow up with a future post and let you
> all know what I found out.
>

Brian: Nothing magic here! Just run the signals through a 74HCT14 or
74HCT541, Schmidt Triggers, and let the chip do the work!

The '14 in inverting, so you might have to use TWO gates per input to
"re-invert" the signal so you have non-inverting. But in the '541, you have
EIGHT non-inverting buffers!

If you haven't a clue about such, get Don Lancaster's CMOS Cookbook. It had
gobs of data and "how-to", but the "data sheets" for IC's in it is outdated.
There are many more now available (such as the cited '541) not in the book.

Jan Rowland


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