Dodi Iskandar


 The presence in the home
security system is absolutely necessary, because the current
security system has become a vital requirement, it is trig-
gered by rampant crime. Therefore, the authors would like
to introduce a security door system that can be watched at
any time via the indicator lights are CMOS-based ICs. The
purpose of this study was to analyze a series of door security
systems, where in order to nd out more about the work-
ings and components in this circuit. Method is to conduct
research conducted literature review, which is seeking infor-
mation from books and the internet. And rare-step research
such as: to design the circuit, the circuit arrangement and
testing the circuit. Based on observations, indicates that
this tool can work as expected. Penamaan File: 41101131

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