Long Delay Astable Multivibrator
Posted: Mon May 17, 2004 8:55 pm
I purchased a light controller board that will will produce multiple patterns; right-to-left, left to right, middle outwards, etc.
The problem is that you select which pattern you want by pressing a pushbutton and that pattern repeats until you press the pushbutton again. I want to eliminate the PB by having a circuit that displays the first pattern for say 20 sec.'s and then go immediately on to the next pattern (w/o having to push a button) for 20 sec.'s,and then the next, etc, and repeat from the beginning.
I was thinking of using a 555 or 556 timer. Anybody have any ideas ?
The problem is that you select which pattern you want by pressing a pushbutton and that pattern repeats until you press the pushbutton again. I want to eliminate the PB by having a circuit that displays the first pattern for say 20 sec.'s and then go immediately on to the next pattern (w/o having to push a button) for 20 sec.'s,and then the next, etc, and repeat from the beginning.
I was thinking of using a 555 or 556 timer. Anybody have any ideas ?