i have a tv that works on 12v dc and also 220v Ac. i can attach both power cables. I run it on the 12v battery almost of the time but some times the 220v electricity is back so i have to make it work on it by remove the 12v dc blug and re-switch it on again so it can work on 220v blug. if i don't remove it the screen will still work on 12v blug even the 220v is excited. i need a simple circuit that can switch of the 12v blug once the220v ac is back.
note: i used a charger for my battery so once the 220v Ac is back the volt of the battery blug incrase from 12v to almost more than 13v.
any help please.