Wagner Lipnharski wrote:

> What about to use some 74hct14 between the encoders and the '245? It
> could reshape the pulses nicely and the '245 would not receive "analog"
> intermediate signals...  '14 comes in 6 inverters per package, what
> could serve up to 3 encoders.
>

That's what I was planning for tonight.

>
> Some optical encoders use a simple diode+photodiode as the movement
> sensing element, and the photodiode doesn't need to be necessarily a
> sharp and fast switching unit... in real it switches slowly as the
> movement wheel starts to allow the light from the emitter to reach the
> sensor, it goes increasing in lumnes, what causes the photo-diode to
> make a curved slope and not a sharp one...  the '14 could solve it.
>

I agree.

> Probably if you turn the encoders in high speed, with your actual
> configuration, the '245 would work since the photo diode transitions
> would be faster.
>

I still get phantom transitions regardless of speed, granted not as bad as
speed increases. When in tranisition I get oscillations at about 50Mhz
(perfect sinewave), which course the rf it puts out causes other problems.