Yeah, it can be done using a uP (Micro-Processor) and any of a few dozen of them. I just figure micro-controllers have their place but something like this is a few buttons and a relay. Most of us saw and placed a thousand of them in our career.Thanks, Ron, this indeed is the circuitI was describing., even drawn with standard symbols. And all of your comments are exactly on target. Doing this with an arduino would be a whole lot more complex, more expensive, and much less reliable.
Simple, basic crude and reliable.