Author(s) :

Abdussamad U. Jibia.

Volume/Issue :

Abstract :

In this paper, a serial-input electronic key is presented. Unlike the conventional combination lock, the input combi-nation is serially applied. Each of the three entries is given by the number of times a press-and-release button is pressed during an interval determined by pressing another pushbutton switch. The system design is achieved by breaking the system into three main blocks, namely the asynchronous timing unit, the synchronous data processing unit and input/output unit. The input/output unit refers to all the input/output devices. The timing unit sequences the operation of the system with respect to time while the data processing unit sequences operations as a function of data entered through the asynchronous push button switch as well as of time. Test results have shown the system to be workable and reliable.

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