Hi everybody, thanks for your replies.
Yes, im using a 9v battery like the picture, but im using a rechargable 9v battery, because I want to save money with the circuit.
Two 9v batteries is more expensive that I was thinking CrossRoads, may be another option ?
Do you mean a pack of six "AA" for ATMega and the servo Paul__B ?
I dont know what is aDMM raschemmel...
Best regards, GInza.