The PLL suggestions seems tricky. I remember a thread about
some major PLL-problems a few weeks back... Ill take a quick
look at it just to see whats involved :-)

The f/v and v/f method is one nice way.. no PIC tho ! ;-)

First I'll try to just send out 8 fast pulses for each 0-50 hz pulse
if that doesnt work. I think i'll go for this suggestion.
It doesn't sound simple to program at all, but hopefully doable :-)
It will be done in a F877 since I have a few of those.

Indeed all nice suggestions !
thanxs guys

> That means you can time one cycle, divide the time by
> eight and generate evenly spaced pulses while you time the next
> incoming cycle.
>If the incoming frequency varies by more than 1/8
> you have a theoretical problem (you haven't finished sending the
> last lot before you need to start over). Again, in practical terms,
> who cares as long as you are looking for a frequency output, not an
> absolute number of pulses.
> The times are relatively long so it would be fairly simple to
> implement as a couple of software timing loops in a 12C508 and
> absolute frequency isn't an issue so the internal RC oscillator
> would be fine.
>
> Steve.

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