This project details about making an alarm battery which will wake you up at the given time. Materials required for this experiment are: Transformer, NPN transistor, connecting wire, alarm watch, 12v battery. Take Transformer in your hand which converts 220v to 12v or 12v to 220v. Identify the wire by passing the 12V current in the first pair wire if the voltage in the second wire is 0.65v then change the wire then you can find out that it is coming 2230v. Take the watch and de assemble it. You can now be able to see the spring like structure that will  be your signal wire.Connect first wire in the positive terminal of the battery and the second wire in the spring. Take the transistor which should be NPN. Connect the transistor and after that, connect the wire to the signal wire.