Week 2
This week was about title registration. My supervisor had to
register for me. While he want to register, I research about my project. I
review that many of this project choose DTMF (Dual-Tones Multi-Frequency)
systems. When I research, this systems is easy because it is aready decode the
button presses that form the password to access the systems to control the
devices. As the caller press the specific password, it results in turning ON or
OFF specific device. The devices switching achieved by a relay. DTMF generator
generates two frequencies corresponding
to a number or code which will be transmitted through the communication
networks, constituting the transmitter section which is simply equivalent to a
mobile set. In the receiver part, DTMF detector IC (8870) detects the number or
code represented by DTMF.
Block diagram
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