摘要：Because the proliferation of late occurrence of theft at home more often emptyhouse so the opportunity thieves entered more freely drain bias of existingproperty within the house that makes sense is not safe and comfortable homeowner. The author aims to create a tool to study the electronic lock as safetyalternatives at home using a combination of three buttons. In collecting data onscientific writing, writer use method of study and literature derived fromelectronic books associated with scientific writing and testing methods that havepracticed the lab and the research and concluded that the writing contained inthis scientifically. Electronic key to the overall analysis tool has the basicworkings of the secret combination of button presses simultaneously will makethe transistor in a state of blockage or cutoff to saturation and finally move therelay when a magnetic induction of the coil relay, the relay is in a state positionto be connected normally close so the application system in a state controlled orON. The conclusion that the authors get after doing the test turns out the toolcan work, and work properly. From the test results either in performance ortechnical data obtained by alter-fox codes as desired. Three key combination hasbeen encoded by the examiner is 2, 1, and 6 of this pin can not be changed backbecause the equipment has enabled it to work on coding the combination ofthese pin. key words: electronic lock.
