>
> My problem is in trying to get the LED to have three quick successions
> with increasing frequency and then off. If the on pulses were a water,
> it would be like throwing a stone onto a calm pond and seeing the
> ripples start as one ripple and then quickly followed by a second ripple
> and slightly more quickly followed by a third and then calm until the
> next stone is thrown.
>
>
Ok, if I'm parsing that correctly, you're looking for something like
on-50mS, off-500mS, on 50mS, off-250mS, on-50mS, off-1000mS, repeat.

Assuming I'm not completely off base here....

A couple minutes of using the Google augmented memory tool finds this
version.
http://www.bowdenshobbycircuits.info/page5.htm#4017-2.gif
(555 feeding a 4017 for a ten step sequencer)
If you configured the 555 to be 50mS on and 200mS off then tied your lights
to outputs 1, 4, 5 and reset the counter at nine, you'd be pretty close to
the described goal.
Different combinations of lights can be created via diode OR connections to
the individual outputs.
Different patterns with integer multiples of the base time can be created
by selecting different combinations of outputs and reset placement.
You'd likely need to add drive transistors to get the led current high
enough.


-Denny
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