By | February 8, 2015
when Led On it means that your password is correct if the Led off it,s mean that Your Password is Wrong You can Attach a Relay instead of Led after attaching Relay you can ON and OFF High devices.The Password in the Code is 123456 you can change this password By editing the code The Circuit of this Project is so simple You need Hex keypad and Connect with Arduino.
Circuit Diagram:

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