Need you valuable assistance for my below issue.
i need to activate a relay 30A 230V exactly 30 seconds after a power failure. ( Generator kicks in after 15 seconds but it will trip off the safety switch if my 30A heater is already On , but no issue once 30 seconds is finished)
So i need Arduino Nano to identify power is down.
Start a delay timer for 30 seconds.
Activate 30A relay after 30 seconds ( from generator power) .
Also suggest me the best way to power up Android nano.