2 of these circuits would work also using these 12 volt DC timer modules.. The events can be independent with 2 pushbuttons or sequenced with one push button. The latter would require 2, DPDT relays instead of the SPDT relay used in the linked post. The 1 meg pots make it adjustable up to 180 seconds after the button is pushed. No messing with formulas or IC chips or PC boards.
http://www.jcstudiosinc.com/Bl...d=478&categoryId=426
Dale H
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