orangeLearner:
I think that is going a little far. You only need to simulate with the appliances that will be used there. (and the microwave does not use any energy when plugged in)I put my cap across the power supply output, not the 5V. Energy stored in a capacitor varies quadratically with voltage. My circuit ran for three days and never reset. Even if it does, I turned on the WDT for two seconds as a redundant safety measure.
How do you do it across the power supply output? I am using a USB adapter (5V, 1A).
Also, I have the WDT set for 8 seconds, but even with the WDT the arduino doesnt fix itself once it goes down (which is something I cant understand)