Re: LED control circuit

On Thu, 18 May 2006 13:07:41 -0700, gstringe wrote:

This will probably be easy for you folks who do this all the time and
are up on what is available IC wise.

I want to sequence an LED thru modes with a push button. It will
sequence like this: on, flash, off, on, flash, off etc.

I would supply steady power and flash power to a bus maybe as there
will be a lot of LEDs to control.

Any clever ideas out there?

Many thanks for the help.

I think your basic idea is good. There is a flashing bus, a continuously
on bus, and ground.

For each button, there is a counter, which is configured so it resets
itself when it gets to 11. So it counts as follows: 00, 01, 10, 00 etc.

These counter outputs go to an analog mux/demux which, according to the
input count, selects either the continuous bus, the blinking bus, or
ground.

Let me know if you want more detail.

--Mac

.

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